Leguminosae

マメ科

関

bean、ceratonia、Fabaceae、legume、leguminous

　

WordNet

1. a large family of trees, shrubs, vines, and herbs bearing bean pods; divided for convenience into the subfamilies Caesalpiniaceae; Mimosaceae; Papilionaceae (同)family Leguminosae, Fabaceae, family Fabaceae, legume family, pea family
2. any of various leguminous plants grown for their edible seeds and pods (同)bean plant
3. any of various seeds or fruits that are beans or resemble beans
4. hit on the head, especially with a pitched baseball
5. any of various edible seeds of plants of the family Leguminosae used for food (同)edible bean
6. an erect or climbing bean or pea plant of the family Leguminosae (同)leguminous plant
7. the fruit or seed of any of various bean or pea plants consisting of a case that splits along both sides when ripe and having the seeds attach to one side of the case
8. the seedpod of a leguminous plant (such as peas or beans or lentils)
9. relating to or consisting of legumes

PrepTutorEJDIC

1. 『豆』(おもにいんげん豆・そら豆など大きめの豆類) / 豆のさや(pod) / 豆に似た実 / 《俗》頭 / 《俗》(野球で)ビーンボールを投げる
2. マメ科植物の総称(特に食用・飼料用) / 豆のさや
3. マメの,マメ科の

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/07/31 09:33:42」(JST)

wiki ja

[Wiki ja表示]

マメ科 Fabaceae
ベニバナツメクサ Trifolium incarnatum
分類（APG III）
界 : 植物界 Plantae 階級なし : 被子植物 angiosperms 階級なし : 真正双子葉類 eudicots 階級なし : コア真正双子葉類 core eudicots 階級なし : バラ類 rosids 階級なし : マメ類 fabids 目 : マメ目 Fabales 科 : マメ科 Fabaceae
学名
Fabaceae Lindl. (1836) nom. cons. Leguminosae Juss. (1789) nom. alt.
亜科
ジャケツイバラ亜科 Caesalpinoideae ネムノキ亜科 Mimosoideae マメ亜科 Faboideae (Papilionoideae)

マメ科（まめか、Fabaceae syn. Leguminosae）は、被子植物に含まれる分類群の1つで、いわゆるマメの仲間を含む。

マメ科・ネムノキ科・ジャケツイバラ科に3分する説もあったが、ジャケイツバラ科が他の2科を内包する側系統であり、系統的には否定された。

特徴

マメ科の植物は、葉が羽状複葉になるものが多い。また「就眠運動（夜になると葉柄や小葉の根元（葉枕）で折れ曲がり葉が閉じること）」をするものもある。オジギソウでは触れただけで同じような運動を起こす。托葉があり、葉と同様に大きくなるもの（エンドウ）、蜜腺になるもの（ヤハズエンドウ）、とげになるもの（ハリエンジュ）などもある。

蔓性のものも多く、茎が巻き付くものと巻きひげを発達させるものがある。草本も木本もあり、また立派な樹木になるものも含まれる。

花は左右対称になる傾向がある。マメ亜科は独特の形を持っており、蝶形花という。雌しべは平らで、熟すると2つに割れ、中に1列におさまる種子を放出するものが多い。いわゆる「まめ」の形である。種子には胚乳はなく巨大な子葉が栄養分を蓄えている。

生態

一部のマメ科植物は根に根粒もしくは茎に茎粒を持ち、根粒菌という細菌が共生している。根粒菌は植物からリンゴ酸などの効率のいい栄養分をもらって生活の場を提供して貰う代わりに、大気中の窒素を植物にとって使いやすい硝酸塩に転換（窒素固定）する。窒素は植物にとって必須元素であり、肥料として取り入れる成分の一つであるが、豊富に存在する気体窒素は自然界では一部の細菌と雷などでしか使用可能形態に転換できない。特に根粒ではその能力が高いため、それを持つ植物は自ら肥料を作ることのできることになり、そのような植物はやせている土地でもよく育つものが多い。

帰化植物にはマメ科のものが多い。これは上記のように荒れ地でよく育つものが多いことも理由の一つであると考えられる。

利用

種子が可食のものが多く含まれ、広義の穀物として主食並に利用されるものも数多い。日常語としての豆は往々にして種子のことを指す。ただしマメ科のなかにもエニシダやクララ、トウアズキ、ニセアカシアといった有毒種があるため注意が必要である。

上記のようにマメ科には根粒などを持っているものが多く、それらは自力で肥料が作れるため、荒れ地でよく育つ。これは栽培植物としての扱いやすさにもつながるが、そのために荒れ地の緑化に使われる例もある。アカシアやギンゴウカンがその代表例である。これを利用してゲンゲなどは緑肥植物としても使われている。半面で、この窒素固定を自分で行なう生態のため、別の場所への人為的な移植が難しい種もある。

観賞用に栽培される種も多い。デイゴ、ハナズオウ、スイートピー、ルピナス spp.、フジ、ホウオウボクなど、独特の花形と多彩な花色が楽しまれる。

下位分類

広義のマメ科は、745属19500種を含むとも、650属12000種であるともされる大きな科である。

花の形態により伝統的にマメ亜科、ジャケツイバラ亜科、ネムノキ亜科の3亜科に大別されてきた（新エングラー体系など）。クロンキスト体系ではそれらを科にしてマメ科を3科に分割し、それら3科（すなわち、従来のあるいは現在のマメ科）の属する目としてマメ目を立てた。しかしいずれも、系統的な分類ではない。APGは広義のマメ科を採用している。

分子系統によれば、従来のジャケツイバラ亜科はマメ科の中で基底的な側系統群である。特に、ネムノキ亜科がきわめて派生的な位置にあるため、系統的な亜科分類では、ジャケツイバラ亜科はジャケツイバラ連 Caesalpinieae とカワラケツメイ連 Cassieae のそれぞれ一部（ジャケツイバラ属 Caesalpinia ・ナンバンサイカチ属 Cassia など）からなるコンパクトな単系統に限定される。ただし、それ以外の群の新たな亜科分類は提唱されていない。

マメ科

[C] 広義のデタリウム連 Detarieae （Amherstieae を含む）   [C] ハナズオウ連 Cercideae   [C] Duparquetia （カワラケツメイ連）     [C] 広義の Dialiinae （カワラケツメイ連）     [F] マメ亜科     [?] Umtiza など     [C] 狭義のジャケツイバラ亜科 （ジャケツイバラ連の一部・カワラケツメイ連の一部）       [M] Dinizia （オジギソウ連）   [C] Dimorphandra ・ Mora （ジャケツイバラ連）   [C] Arapatiella ・ Peltophorum など （ジャケツイバラ連）     [C] Moldenhawera ・ Diptychandra （ジャケツイバラ連）     [C] Erythrophleum （ジャケツイバラ連）   [M] ネムノキ亜科の大半

[C] ジャケツイバラ亜科 Caesalpinioideae

花は左右相称であるがマメ亜科のように特殊化していない。サイカチ、センナ、ジャケツイバラなど。ハナズオウ、ハカマカズラなどは系統的には含まれない。

[M] ネムノキ亜科 Mimosoideae

花は放射相称、花弁は小さく（雄しべが目立つ）、多数の花からなる花序を作る。ネムノキ、オジギソウ、アカシア（ミモザ）など。

[F] マメ亜科（Faboideae または 代替名 Papilionoideae)

最大の亜科、特徴的な花の形態を有する。

• ジャケツイバラ亜科のホウオウボク。放射相称に近い

• ネムノキ亜科のネムノキ。目立つのは雄蕊

• マメ亜科のエンドウ。典型的な蝶形花

主な種

Caesalpinioideae ジャケツイバラ亜科

• Caesalpinieae ジャケツイバラ連
  • Caesalpinia ジャケツイバラ属：ジャケツイバラ
  • Gleditsia サイカチ属：サイカチ
  • Haematoxylum アカミノキ属：アカミノキ
• Cassieae カワラケツメイ連
  • Cassia ナンバンサイカチ属
  • Chamaecrista カワラケツメイ属：カワラケツメイ
  • Ceratonia イナゴマメ属：イナゴマメ（キャロブ）
  • Delonix ホウオウボク属：ホウオウボク
  • Senna センナ属：エビスグサ、センナ
• Cercideae ハナズオウ連
  • Bauhinia ハカマカズラ属：ハカマカズラ
  • Cercis ハナズオウ属：ハナズオウ
• Detarieae デタリウム連
  • Saraca サラカ属：ムユウジュ
  • Tamarindus タマリンド属（1属1種）：タマリンド

Mimosoideae ネムノキ亜科

• Acacieae アカシア連
  • Acacia アカシア属：アカシア・アラビアゴムノキ
• Mimoseae オジギソウ連
  • Desmanthus アメリカゴウカン属：イリノイバンドルフラワー
  • Entada モダマ属
  • Leucaena ギンネム属：ギンネム（ギンゴウカン）
  • Mimosa オジギソウ属：オジギソウ
  • Parkia パルキア属：ヒロハフサマメノキ
• Ingeae ネムノキ連
  • Albizia ネムノキ属：ネムノキ
  • Calliandra ベニゴウカン属：ベニゴウカン
  • Samanea サマネア属：モンキーポッド

Faboideae マメ亜科

ADAクレード

• Angylocalyceae
  • Angylocalyx
• Dipterygeae
  • Dipteryx トンカマメ属
• Amburaneae
  • Amburana

イチベンバナ連

• Swartzieae イチベンバナ連
  • Swartzia イチベンバナ属
  • Bobgunnia

50kb逆位クレード

• Aeschynomeneae クサネム連
  • Aeschynomene クサネム属：クサネム
  • Arachis ラッカセイ属：ラッカセイ
• Amorpheae ラッカセイ連
  • Amorpha イタチハギ属：イタチハギ
• Cicereae ヒヨコマメ連
  • Cicer ヒヨコマメ属：ヒヨコマメ
• Crotalarieae タヌキマメ連
  • Aspalathus アスパラトゥス属：ルイボス
• Dalbergieae ダルベルギア連
  • Dalbergia ツルサイカチ属：キングウッド、ローズウッド、ブラジリアン・ローズウッド、ケランジィ
  • Pterocarpus インドカリン属：カリン、コウキ
• Desmodieae ヌスビトハギ連
  • Desmodium ヌスビトハギ属：ヌスビトハギ
  • Lespedeza ハギ属：ハギ
  • Uraria フジボグサ属：フジボグサ
• Exostyleae
  • Exostyles
• Fabeae (Viceae) ソラマメ連
  • Lathyrus レンリソウ属：ハマエンドウ・スイートピー
  • Lens ヒラマメ属：ヒラマメ
  • Pisum エンドウ属：エンドウ
  • Vicia ソラマメ属：ヤハズエンドウ・ソラマメ
• Galegeae ゲンゲ連
  • Astragalus ゲンゲ属：キバナオウギ・ゲンゲ（レンゲ）
  • Glycyrrhiza カンゾウ属：スペインカンゾウ（リコリス）
  • Oxytropis オヤマノエンドウ属：オヤマノエンドウ
• Genisteae エニシダ連
  • Augyrocytisus ギンヨウエニシダ属：ギンヨウエニシダ
  • Cytisus エニシダ属：エニシダ
  • Genista ヒトツバエニシダ属
  • Spartium レタマ属（1属1種）：レタマ
  • Ulex ハリエニシダ属：ハリエニシダ
• Hedysareae イワオウギ連
  • Hedysarum イワオウギ属：イワオウギ
• Indigofereae コマツナギ連
  • Cyamopsis クラスタマメ属：クラスタマメ（グアールマメ、グアー）
  • Indigofera コマツナギ属：コマツナギ
• Loteae ミヤコグサ連
  • Lotus ミヤコグサ属：ミヤコグサ
• Luppineae ルピナス連
  • Lupinus ルピナス属（ノボリフジ）
• Millettieae フジ連
  • Wisteria フジ属：フジ（ノダフジ）
• Phaseoleae インゲン連
  • Butea ブテア属：ハナモツヤクノキ
  • Cajanus キマメ属：キマメ
  • Canavalia ナタマメ属：ナタマメ
  • Erythrina デイゴ属：デイゴ
  • Glycine ダイズ属：ダイズ
  • Hardenbergia ハーデンベルギア属：コマチフジ
  • Lablab フジマメ属：フジマメ
  • Mucuna トビカズラ属：アイラトビカズラ
  • Phaseolus インゲン属：インゲンマメ
  • Pachyrhizus クズイモ属：ヒカマ
  • Psophocarpus シカクマメ属：シカクマメ
  • Pueraria クズ属：クズ
  • Rhynchosia タンキリマメ属：タンキリマメ
  • Vigna ササゲ属：アズキ
• Robinieae ハリエンジュ連
  • Robinia ハリエンジュ属：ニセアカシア（ハリエンジュ）
• Sophoreae クララ連（エンジュ連）
  • Castanospermum カスタノスペルマム属（1属1種）：オーストラリアビーンズ
  • Maackia イヌエンジュ属：イヌエンジュ
  • Ormosia オルモシア属：ワイルーロ
  • Sophora クララ属：クララ
  • Styphnolobium エンジュ属：エンジュ
• Trifolieae シャジクソウ連
  • Medicago ウマゴヤシ属：ウマゴヤシ
  • Melilotus シナガワハギ属
  • Trigonella フェヌグリーク属：フェヌグリーク（コロハ）
  • Parochetus パロケツス属：ブルークローバー
  • Trifolium シャジクソウ属：ムラサキツメクサ（アカツメクサ）・シロツメクサ

参考文献

• Angiosperm Phylogeny Group (2003). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II" (PDF). Botanical Journal of the Linnean Society 141: 399–436. （APG II。オープンアクセス）
• The Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III" (PDF). Botanical Journal of the Linnean Society 161 (2): 105–121. （APG III。オープンアクセス）

関連項目

• 豆
• 肥料木

外部リンク

• マメ科（画像）：フラボン

wiki en

[Wiki en表示]

This article is about Fabaceae s.l. (or Leguminosae), as defined by the APG System. For Fabaceae s.s. (or Papilionaceae), as defined by less modern systems, see Faboideae.

Fabaceae Temporal range: Palaeocene–Recent
Kudzu (Pueraria lobata)
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Rosids
Order:	Fabales
Family:	Fabaceae Lindl. (Leguminosae Jussieu, nom. cons.).
Type genus
Faba (now included in Vicia) Mill.
Subfamilies
Faboideae Rudd (Papilionoideae Juss., is the alternative name) Caesalpinioideae DC. Mimosoideae DC.
Diversity
730 genera and 19,400 species
Fabaceae distribution map. Legumes are found in four major biomes: rain forest, temperate, grass, and succulent.
Synonyms
Caesalpiniaceae R.Br. Cassiaceae Link Ceratoniaceae Link Detariaceae (DC.) Hess Hedysareae (Hedysaraceae) Agardh Lathyraceae Burnett Lotaceae Burnett Mimosaceae R.Br. Papilionaceae Giseke Phaseolaceae Ponce de León & Alvares Robiniaceae Welw. Swartziaceae (DC.) Bartl.

The Fabaceae or Leguminosae, commonly known as the legume, pea, or bean family, are a large and economically important family of flowering plants. It includes trees, shrubs, and perennial or annual herbaceous plants, which are easily recognized by their fruit (legume) and their compound, stipulated leaves. The group is widely distributed and is the third-largest land plant family in terms of number of species, behind only the Orchidaceae and Asteraceae, with 630 genera and over 18,860 species. The five largest of the 630 legume genera are Astragalus (over 2,000 species), Acacia (over 1000 species), Indigofera (around 700 species), Crotalaria (around 700 species), and Mimosa (around 500 species), which constitute about a quarter of all legume species. About 18,000 legume species are known, amounting to about 7% of flowering plant species. Fabaceae is the most common family found in tropical rainforests and in dry forests in the Americas and Africa.

Recent molecular and morphological evidence supports the fact that the Fabaceae is a single monophyletic family. This point of view has been supported not only by the degree of interrelation shown by different groups within the family compared with that found among the Leguminosae and their closest relations, but also by all the recent phylogenetic studies based on DNA sequences. These studies confirm that the Leguminosae are a monophyletic group that is closely related with the Polygalaceae, Surianaceae and Quillajaceae families and that they belong to the order Fabales.

Along with the cereals, some fruits and tropical roots a number of Leguminosae have been a staple human food for millennia and their use is closely related to human evolution.

A number are important agricultural and food plants, including Glycine max (soybean), Phaseolus (beans), Pisum sativum (pea), Cicer arietinum (chickpeas), Medicago sativa (alfalfa), Arachis hypogaea (peanut), Lathyrus odoratus (sweet pea), Ceratonia siliqua (carob), and Glycyrrhiza glabra (liquorice). A number of species are also weedy pests in different parts of the world, including: Cytisus scoparius (broom), Robinia pseudoacacia (black locust), Ulex europaeus (gorse), Pueraria lobata (kudzu), and a number of Lupinus species.

Etymology

The name 'Fabaceae' comes from the defunct genus Faba, now included in Vicia. The term "faba" comes from Latin, and appears to simply mean "bean". Leguminosae is an older name still considered valid, and refers to the fruit of these plants, which are called legumes.

Description

The fruit of Gymnocladus dioicus

Fabaceae range in habit from giant trees (like Koompassia excelsa) to small annual herbs, with the majority being herbaceous perennials. Plants have indeterminate inflorescences, which are sometimes reduced to a single flower. The flowers have a short hypanthium and a single carpel with a short gynophore, and after fertilization produce fruits that are legumes.

Growth habit

The Leguminosae have a wide variety of growth forms including trees, shrubs or herbaceous plants or even vines or lianas. The herbaceous plants can be annuals, biennials or perennials, without basal or terminal leaf aggregations. They are upright plants, epiphytes or vines. The latter support themselves by means of shoots that twist around a support or through cauline or foliar tendrils. Plants can be heliophytes, mesophytes or xerophytes.

Leaves

The leaves are usually alternate and compound. Most often they are even- or odd-pinnately compound (e.g. Caragana and Robinia respectively), often trifoliate (e.g. Trifolium, Medicago) and rarely palmately compound (e.g. Lupinus), in the Mimosoideae and the Caesalpinioideae commonly bipinnate (e.g. Acacia, Mimosa). They always have stipules, which can be leaf-like (e.g. Pisum), thorn-like (e.g. Robinia) or be rather inconspicuous. Leaf margins are entire or, occasionally, serrate. Both the leaves and the leaflets often have wrinkled pulvini to permit nastic movements. In some species, leaflets have evolved into tendrils (e.g. Vicia).

Many species have leaves with structures that attract ants that protect the plant from herbivore insects (a form of mutualism). Extrafloral nectaries are common among the Mimosoideae and the Caesalpinioideae, and are also found in some Faboideae (e.g. Vicia sativa). In some Acacia, the modified hollow stipules are inhabited by ants and are known as domatia.

Roots

Main article: Root nodule

Many Fabaceae host bacteria in their roots within structures called root nodules. These bacteria, known as rhizobia, have the ability to take nitrogen gas (N₂) out of the air and convert it to a form of nitrogen that is usable to the host plant ( NO₃⁻ or NH₃ ). This process is called nitrogen fixation. The legume, acting as a host, and rhizobia, acting as a provider of usable nitrate, form a symbiotic relationship.

Flowers

"Pea flower" redirects here. For the flour produced from peas, see pea flour.

A flower of Wisteria sinensis, Faboideae. Two petals have been removed to show stamens and pistil

The flowers often have five generally fused sepals and five free petals. They are generally hermaphrodite, and have a short hypanthium, usually cup shaped. There are normally ten stamens and one elongated superior ovary, with a curved style. They are usually arranged in indeterminate inflorescences. Fabaceae are typically entomophilous plants (i.e. they are pollinated by insects), and the flowers are usually showy to attract pollinators.

In the Caesalpinioideae, the flowers are often zygomorphic, as in Cercis, or nearly symmetrical with five equal petals in Bauhinia. The upper petal is the innermost one, unlike in the Faboideae. Some species, like some in the genus Senna, have asymmetric flowers, with one of the lower petals larger than the opposing one, and the style bent to one side. The calyx, corolla, or stamens can be showy in this group.

In the Mimosoideae, the flowers are actinomorphic and arranged in globose inflorescences. The petals are small and the stamens, which can be more than just 10, have long, coloured filaments, which are the showiest part of the flower. All of the flowers in an inflorescence open at once.

In the Faboideae, the flowers are zygomorphic, and have a specialized structure. The upper petal, called the banner, is large and envelops the rest of the petals in bud, often reflexing when the flower blooms. The two adjacent petals, the wings, surround the two bottom petals. The two bottom petals are fused together at the apex (remaining free at the base), forming a boat-like structure called the keel. The stamens are always ten in number, and their filaments can be fused in various configurations, often in a group of nine stamens plus one separate stamen. Various genes in the CYCLOIDEA (CYC)/DICHOTOMA (DICH) family are expressed in the upper (also called dorsal or adaxial) petal; in some species, such as Cadia, these genes are expressed throughout the flower, producing a radially symmetrical flower.

Fruit

Main article: Legume

Legume of Vicia angustifolia

The ovary most typically develops into a legume. A legume is a simple dry fruit that usually dehisces (opens along a seam) on two sides. A common name for this type of fruit is a "pod", although that can also be applied to a few other fruit types. A few species have evolved samarae, loments, follicles, indehiscent legumes, achenes, drupes, and berries from the basic legume fruit.

Physiology and biochemistry

The Leguminosae are rarely cyanogenic however, where they are, the cyanogenic compounds are derived from tyrosine, phenylalanine or leucine. They frequently contain alkaloids. Proanthocyanidins can be present either as cyanidin or delphinidine or both at the same time. Flavonoids such as kaempferol, quercitin and myricetin are often present. Ellagic acid has never been found in any of the genera or species analysed. Sugars are transported within the plants in the form of sucrose. C3 photosynthesis has been found in a wide variety of genera. The family has also evolved a unique chemistry. Pterocarpans are a class of molecules (derivatives of isoflavonoids) found only in the Fabaceae.

Ecology

Distribution and habitat

The Fabaceae have an essentially worldwide distribution, being found everywhere except Antarctica and the high arctic. The trees are often found in tropical regions, while the herbaceous plants and shrubs are predominant in extratropical regions.

Biological nitrogen fixation

Roots of Vicia with white root nodules visible.

Cross-section through a root nodule of Vicia observed through a microscope.

Biological nitrogen fixation (BNF, performed by the organisms called diazotrophs) is a very old process that probably originated in the Archean eon when the primitive atmosphere lacked oxygen. It is only carried out by Euryarchaeota and just 6 of the more than 50 phyla of bacteria. Some of these lineages co-evolved together with the flowering plants establishing the molecular basis of a mutually beneficial symbiotic relationship. BNF is carried out in nodules that are mainly located in the root cortex, although they are occasionally located in the stem as in Sesbania rostrata. The spermatophytes that co-evolved with actinorhizal diazotrophs (Frankia) or with rhizobia to establish their symbiotic relationship belong to 11 families contained within the Rosidae clade (as established by the gene molecular phylogeny of rbcL, a gene coding for part of the RuBisCO enzyme in the chloroplast). This grouping indicates that the predisposition for forming nodules probably only arose once in flowering plants and that it can be considered as an ancestral characteristic that has been conserved or lost in certain lineages. However, such a wide distribution of families and genera within this lineage indicates that nodulation had multiple origins. Of the 10 families within the Rosidae, 8 have nodules formed by actinomyces (Betulaceae, Casuarinaceae, Coriariaceae, Datiscaceae, Elaeagnaceae, Myricaceae, Rhamnaceae and Rosaceae), and the two remaining families, Ulmaceae and Fabaceae have nodules formed by rhizobia.

The rhizobia and their hosts must be able to recognize each other for nodule formation to commence. Rhizobia are specific to particular host species although a rhizobia species may often infect more than one host species. This means that one plant species may be infected by more than one species of bacteria. For example, nodules in Acacia senegal can contain seven species of rhizobia belonging to three different genera. The most distinctive characteristics that allow rhizobia to be distinguished apart are the rapidity of their growth and the type of root nodule that they form with their host. Root nodules can be classified as being either indeterminate, cylindrical and often branched, and determinate, spherical with prominent lenticels. Indeterminate nodules are characteristic of legumes from temperate climates, while determinate nodules are commonly found in species from tropical or subtropical climates. Nodule formation is common throughout the leguminosae, it is found in the majority of its members that only form an association with rhizobia, which in turn form an exclusive symbiosis with the leguminosae (with the exception of Parasponia, the only genus of the 18 Ulmaceae genera that is capable of forming nodules). Nodule formation is present in all the leguminosae sub-families, although it is less common in the Caesalpinioideae. All types of nodule formation are present in the sub-family Papilionoideae: indeterminate (with the meristem retained), determinate (without meristem) and the type included in Aeschynomene. The latter two are thought to be the most modern and specialised type of nodule as they are only present in some lines of the Papilionoideae sub-family. Even though nodule formation is common in the two monophyletic subfamilies Papilionoideae and Mimosoideae they also contain species that do not form nodules. The presence or absence of nodule-forming species within the three sub-families indicates that nodule formation has arisen several times during the evolution of the leguminosae and that this ability has been lost in some lineages. For example, within the genus Acacia, a member of the Mimosoideae, A. pentagona does not form nodules, while other species of the same genus readily form nodules, as is the case for Acacia senegal, which forms both rapidly and slow growing rhizobial nodules.

Evolution, phylogeny and taxonomy

Evolution

The order Fabales contains around 7.3% of eudicot species and the greatest part of this diversity is contained in just one of the four families that order contains: Fabaceae. This clade also includes the Polygalaceae, Surianaceae and Quillajaceae families and its origins date back 94 to 89 million years, although it started its diversification some 79 to 74 million years ago. In fact, the leguminosae have diversified during the early tertiary to become a ubiquitous part of the modern earth’s biota, along with many other families belonging to the flowering plants.

The leguminosae have an abundant and diverse fossil record, especially for the Tertiary period. Fossils of flowers, fruit, leaves, wood and pollen from this period have been found in numerous locations. The earliest fossils that can be definitively assigned to the leguminosae appeared in the late Palaeocene (approximately 56 million years ago). Representatives of the 3 sub-families traditionally recognised as being members of the Leguminosae – Cesalpinioideae, Papilionoideae and Mimosoideae — as well as members of the large clades within these sub-families – such as the genistoides – have been found in periods a little later, starting between 55 to 50 million years ago. In fact, a wide variety of taxa representing the main Leguminosae lineages have been found in the fossil record dating from the middle to the late Eocene, suggesting that the majority of the modern fabaceae groups were already present and that a broad diversification occurred during this period. Therefore, the Fabaceae started their diversification approximately 60 million years ago and the most important clades separated some 50 million years ago. The age of the main Cesalpinioideae clades have been estimated as between 56 and 34 million years and the basal group of the Mimosoideae as 44 ± 2.6 million years. The division between Mimosoideae and Faboideae is dated as occurring between 59 and 34 million years ago and the basal group of the Faboideae as 58.6 ± 0.2 million years ago. It has been possible to date the divergence of some of the groups within the Faboideae, even though diversification within each genus was relatively recent. For instance, Astragalus separated from the Oxytropis some 16 to 12 million years ago. In addition, the separation of the aneuploid species of Neoastragalus started 4 million years ago. Inga, another genus of the Papilionoideae with approximately 350 species, seems to have diverged in the last 2 million years.

It has been suggested, based on fossil and phylogenetic evidence, that legumes originally evolved in arid and/or semi-arid regions along the Tethys seaway during the Palaeogene Period. However, others contend that Africa (or even the Americas) cannot yet be ruled out as the origin of the family.

The current hypothesis about the evolution of the genes needed for nodulation is that they were recruited from other pathways after a polyploidy event. Several different pathways have been implicated as donating duplicated genes to the pathways need for nodulation. The main donors to the pathway were the genes associated with the arbuscular mycorrhiza symbiosis genes, the pollen tube formation genes and the haemoglobin genes. One of the main genes shown to be shared between the arbuscular mycorrhiza pathway and the nodulation pathway is SYMRK and it is involved in the plant-bacterial recognition. The pollen tube growth is similar to the infection thread development in that infection threads grow in a polar manner that is similar to a pollen tubes polar growth towards the ovules. Both pathways include the same type of enzymes, pectin-degrading cell wall enzymes. The enzymes needed to reduce nitrogen, nitrogenases, require a substantial input of ATP but at the same time are sensitive to free oxygen. To meet the requirements of this paradoxical situation, the plants express a type of haemoglobin called leghaemoglobin that is believed to be recruited after a duplication event. These three genetic pathways are believed to be part of a gene duplication event then recruited to work in nodulation.

Phylogeny and taxonomy

Phylogeny

The phylogeny of the legumes has been the object of many studies by research groups from around the world. These studies have used morphology, DNA data (the chloroplast intron trnL, the chloroplast genes rbcL and matK, or the ribosomal spacers ITS) and cladistic analysis in order to investigate the relationships between the family’s different lineages. The studies have confirmed that the traditional sub-families Mimosoideae and Papilionoideae are each monophyletic but both are nested within the paraphyletic sub-family Caesalpinioideae. All the different approaches have yielded similar results regarding the relationships between the family's main clades, as shown in the cladogram below.

Fabales

Polygalaceae Surianaceae Quillajaceae Fabaceae Duparquetia* Cercideae clade* unnamed clade (Barnebydendron, Goniorrachis)* unnamed clade (Schotia)* resin-producing Detarieae clade Prioria clade* unnamed clade (Brandzeia, Daniella)* Detarieae sensu stricto clade* Amherstieae clade* Dialiinae clade* Umtiza clade* Caesalpinia clade* Cassia clade* Dimorphandra clade A* Tachigali clade* Peltophorum clade* Dimorphandra group B* Dimorphandra group B* Mimosoideae Faboideae

Asterisks (*) indicate clades traditionally assigned to Caesalpinioideae.

Taxonomy

The Fabaceae are placed in the order Fabales according to most taxonomic systems, including the APG III system. The family includes three subfamilies:

• Mimosoideae: 80 genera and 3,200 species. Mostly tropical and warm temperate Asia and America. Mimosa, Acacia.
• Caesalpinioideae: 170 genera and 2,000 species, cosmopolitan. Caesalpinia, Senna, Bauhinia, Amherstia.
• Faboideae (Papilionoideae): 470 genera and 14,000 species, cosmopolitan. Astragalus, Lupinus.

These three subfamilies have been alternatively treated at the family level, as in the Cronquist and Dahlgren systems. However, this choice has not been supported by late 20th and early 21st century evidence, which has shown the Caesalpinioideae to be paraphyletic and the Fabaceae sensu lato to be monophyletic. While the Mimosoideae and the Faboideae are largely monophyletic, the Caesalpinioideae appear to be paraphyletic and the tribe Cercideae is probably sister to the rest of the family. Moreover, there are a number of genera whose placement into the Caesalpinioideae is not always agreed on (e.g. Dimorphandra).

Genera

The 730 genera included in this family can be viewed on the following three pages:

• List of Mimosoideae genera
• List of Caesalpinioideae genera
• List of Faboideae genera

Economic and cultural importance

Legumes are economically and culturally important plants due to their extraordinary diversity and abundance, the wide variety of edible vegetables they represent and due to the variety of uses they can be put to: in horticulture and agriculture, as a food, for the compounds they contain that have medicinal uses and for the oil and fats they contain that have a variety of uses.

Food and Forage

The history of legumes is tied in closely with that of human civilization, appearing early in Asia, the Americas (the common bean, several varieties) and Europe (broad beans) by 6,000 BCE, where they became a staple, essential as a source of protein.

Their ability to fix atmospheric nitrogen reduces fertilizer costs for farmers and gardeners who grow legumes, and means that legumes can be used in a crop rotation to replenish soil that has been depleted of nitrogen. Legume seeds and foliage have a comparatively higher protein content than non-legume materials, due to the additional nitrogen that legumes receive through the process. Some legume species perform hydraulic lift, which makes them ideal for intercropping.

Farmed legumes can belong to numerous classes, including forage, grain, blooms, pharmaceutical/industrial, fallow/green manure and timber species, with most commercially farmed species filling two or more roles simultaneously.

There are of two broad types of forage legumes. Some, like alfalfa, clover, vetch, and Arachis, are sown in pasture and grazed by livestock. Other forage legumes such as Leucaena or Albizia are woody shrub or tree species that are either broken down by livestock or regularly cut by humans to provide stock feed.

Grain legumes are cultivated for their seeds, and are also called pulses. The seeds are used for human and animal consumption or for the production of oils for industrial uses. Grain legumes include both herbaceous plants like beans, lentils, lupins, peas and peanuts. and trees such as carob, mesquite and tamarind.

Bloom legume species include species such as lupin, which are farmed commercially for their blooms as well as being popular in gardens worldwide. Laburnum, Robinia, Gleditsia, Acacia, Mimosa, and Delonix are ornamental trees and shrubs.

Industrial farmed legumes include Indigofera, cultivated for the production of indigo, Acacia, for gum arabic, and Derris, for the insecticide action of rotenone, a compound it produces.

Fallow or green manure legume species are cultivated to be tilled back into the soil to exploit the high nitrogen levels found in most legumes. Numerous legumes are farmed for this purpose, including Leucaena, Cyamopsis and Sesbania.

Various legume species are farmed for timber production worldwide, including numerous Acacia species, Dalbergia species, and Castanospermum australe.

Melliferous plants offer nectar to bees and other insects to encourage them to carry pollen from the flowers of one plant to others thereby ensuring pollination.A number of legume species are good nectar providers such as alfalfa, white clover, sweet clover and various Prosopis species.

Industrial uses

Natural gums

Natural gums are vegetable exudates that are released as the result of damage to the plant such as that resulting from the attack of an insect or a natural or artificial cut. These exudates contain heterogeneous polysaccharides formed of different sugars and usually containing uronic acids. They form viscous colloidal solutions. There are different species that produce gums. The most important of these species belong to the leguminosae. They are widely used in the pharmaceutical, cosmetic, food and textile sectors. They also have interesting therapeutic properties; for example gum arabic is antitussive and anti-inflammatory. The most well known gums are tragacanth (Astragalus gummifer), gum arabic (Acacia senegal) and guar gum (Cyamopsis tetragonoloba).

Dyes

Indigo colorant

The species used to produce dyes include the following: Logwood Haematoxylon campechianum; a large spiny tree that can grow up to 15 m tall. Its cork is thin and soft and its wood is hard. The heartwood is used to produce dyes that are red and purple. The histological stain called haematoxylin is produced from this species. Brazilwood tree (Caesalpinia echinata) is similar to the previous tree but smaller and with red or purple flowers. The wood is also used to produce a red or purple dye. The Madras thorn (Pithecallobium dulce) is another spiny tree native to Latin America, it grows up to 4 m high and has yellow or green flowers that grow in florets. Its fruit is reddish and is used to produce a yellow dye. Indigo dye is extracted from the True indigo plant Indigofera tinctoria that is native to Asia. In Central and South America dyes are produced from two species related to this species, indigo from Indigofera suffruticosa and Natal indigo from Indigofera arrecta.

Ornamentals

The Cockspur Coral Tree Erythrina crista-galli is one of many leguminosae used as ornamental plants. In addition, it is the National Flower of Argentina and Uruguay.

Legumes have been used as ornamental plants throughout the world for many centuries. Their vast diversity of heights, shapes, foliage and flower colour means that this family is commonly used in the design and planting of everything from small gardens to large parks. The following is a list of the main ornamental legume species, listed by sub-family.

• Subfamily Caesalpinioideae: Bauhinia forficata, Caesalpinia gilliesii, Caesalpinia spinosa, Ceratonia siliqua, Cercis siliquastrum, Gleditsia triacanthos, Gymnocladus dioica, Parkinsonia aculeata, Senna multiglandulosa.
• Subfamily Mimosoideae: Acacia caven, Acacia cultriformis, Acacia dealbata, Acacia karroo, Acacia longifolia, Acacia melanoxylon, Acacia paradoxa, Acacia retinodes, Acacia saligna, Acacia verticillata, Acacia visco, Albizzia julibrissin, Calliandra tweediei, Paraserianthes lophantha, Prosopis chilensis.
• Subfamily Faboideae: Clianthus puniceus, Citysus scoparius, Erythrina crista-galli, Erythrina falcata, Laburnum anagyroides, Lotus peliorhynchus, Lupinus arboreus, Lupinus polyphyllus, Otholobium glandulosum, Retama monosperma, Robinia hispida, Robinia luxurians, Robinia pseudoacacia, Sophora japonica, Sophora macnabiana, Sophora macrocarpa, Spartium junceum, Teline monspessulana, Tipuana tipu, Wisteria sinensis.

Emblematic Leguminosae

• The Cockspur Coral Tree (Erythrina crista-galli), is the National Flower of Argentina and Uruguay.
• The Elephant ear tree (Enterolobium cyclocarpum) is the national tree of Costa Rica, by Executive Order of 31 August 1959.
• The Brazilwood tree (Caesalpinia echinata) has been the national tree of Brazil since 1978.
• The Golden wattle Acacia pycnantha is Australia’s national flower.
• The Hong Kong Orchid tree Bauhinia blakeana is the national flower of Hong Kong.

Image gallery

• Acacia baileyana (Wattle)

• Loments of Alysicarpus vaginalis

• Calliandra emarginata

• Desmodium gangeticum

• Dichrostachys cinerea Sickle Bush

• Indigofera gerardiana

• Tendrils of Lathyrus odoratus (Sweet pea)

• Inflorescence of Lupinus arboreus (Yellow bush lupin)

• Pisum sativum (Peas); note the leaf-like stipules

• Smithia conferta

• Trifolium repens in Kullu District of Himachal Pradesh, India.

• Kashubian vetch – Kashubia

• Zornia gibbosa

References

External links

• Leguminosae at The Plant List
• Leguminosae at The Families of Flowering Plants (DELTA)
• Fabaceae at the Encyclopedia of Life
• Fabaceae at the Angiosperm Phylogeny Website
• Fabaceae at the Tree of Life Web Project
• Fabaceae at the online Flora of China
• Fabaceae at the online Guide to the Flora of Mongolia
• Fabaceae at the online Flora of Zimbabwe
• Fabaceae at the online Flora of Western Australia
• Fabaceae at the online Flora of New Zealand
• Leguminosae at the International Legume Database & Information Service (ILDIS)
• World Legume Species Checklist at Legumes Online
• Fabaceae at Flowers in Israel
• Asociación Española de las Leguminosas (AEL). Charity founded to promote the agricultural use of legumes in Spain.

UpToDate Contents

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Related Links

• Fabaceae - Wikipedia, the free encyclopedia

The Fabaceae or Leguminosae, commonly known as the legume, pea, or bean family, are a large and economically important family of flowering plants. The group is the third-largest land plant family, behind only the Orchidaceae and ...

• Leguminosae — The Plant List

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• LEGUMINOSAE - The Seed Site

The characteristics of this family, now separated into Caesalpiniaceae, Fabaceae , Mimosacae and Papilionaceae.

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★リンクテーブル★

リンク元	「マメ科」「Fabaceae」「legume」「bean」「ceratonia」

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bean、Fabaceae、legume、Leguminosae