維管束
- 関
- fibrovascular bundle、vascular
WordNet
- make into a bundle; "he bundled up his few possessions" (同)bundle_up, roll_up
- sleep fully clothed in the same bed with ones betrothed (同)practice bundling
- a package of several things tied together for carrying or storing (同)sheaf
- of or relating to or having vessels that conduct and circulate fluids; "vascular constriction"; "a vascular bundle"
- the act of binding something into a bundle
- the act of shoving hastily; "she complained about bundling the children off to school"
- a onetime custom during courtship of unmarried couples occupying the same bed without undressing
PrepTutorEJDIC
- (…の)『束』,『包み』,巻いたもの(旅行者の荷物など)《+『of』+『名』》 / …'を'包みにする,束にする / (…に)…'を'ごっちゃに投げ込む《+『名』+『into』+『名』》 / 荷物をまとめてさっさと出て行く《+『off』(『out』,『away』)》
- (血液・樹液などを運ぶ)管の,導管の,血管の
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2013/10/04 01:45:35」(JST)
[Wiki en表示]
Cross section of celery stalk, showing vascular bundles, which include both phloem and xylem
Detail of vascular bundle: closed, collateral vascular bundles of the stem axis of
Zea mays
Vascular bundle in the leaf of
Metasequoia glyptostroboides
A vascular bundle is a part of the transport system in vascular plants. The transport itself happens in vascular tissue, which exists in two forms: xylem and phloem. Both these tissues are present in a vascular bundle, which in addition will include supporting and protective tissues. Also, it is a vein in the leaf that contains conducting tissues.
The xylem typically lies adaxial with phloem positioned abaxial. In a stem or root this means that the xylem is closer to the centre of the stem or root while the phloem is closer to the exterior. In a leaf, the adaxial surface of the leaf will usually be the upper side, with the abaxial surface the lower side. This is why aphids are typically found on the underside of a leaf rather than on the top, since the sugars manufactured by the plant are transported by the phloem, which is closer to the lower surface.
The position of vascular bundles relative to each other may vary considerably: see stele.
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Cross section of a leaf showing parts of a vascular bundle
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Bundle-sheath cells[edit]
Bundle-sheath cells are photosynthetic cells arranged into tightly packed sheaths around the veins of a leaf. They form a protective covering on leaf veins, and consist of one or more cell layers, usually parenchyma. Loosely arranged mesophyll cells lie between the bundle sheath and the leaf surface. The Calvin cycle is confined to the chloroplasts of these bundle sheath cells in C4 plants.
Further readings[edit]
- Campbell, N. A. & Reece, J. B. (2005). Photosynthesis. Biology (7th ed.). San Francisco: Benjamin Cummings.
External links[edit]
- Curtis, Lersten, and Nowak cross section of a vascular bundle
- Mauseth another cross section of a vascular bundle
UpToDate Contents
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English Journal
- Spatial transcriptomes of iron-deficient and cadmium-stressed rice.
- Ogo Y, Kakei Y, Itai RN, Kobayashi T, Nakanishi H, Takahashi H, Nakazono M, Nishizawa NK.Author information Departments of Global Agricultural Sciences and Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.AbstractAlthough the genes involved in metal homeostasis have been investigated over the past few decades, many genes related to metal homeostasis remain uncharacterized, and a comprehensive analysis of the expression of these genes is required. In the present study, we investigated the spatial gene expression profile of iron (Fe)-deficient and cadmium (Cd)-stressed Oryza sativa (rice) using laser microdissection and microarray analysis. Roots of Fe-deficient and Cd-stressed rice were separated into the vascular bundle, cortex, and epidermis plus exodermis. In addition, vascular bundles from new and old leaves at the lowest node, which are important for metal distribution, were analyzed separately. The spatial expression patterns were distinct in each tissue type. Fe deficiency and Cd stress also had significant effects on the transcriptomes, although these were less pronounced than the spatial effects. Genes encoding transporters involved in metal homeostasis, proteins associated with heavy metal detoxification, and phytohormone-related proteins were comprehensively investigated. Additionally, cis motifs involved in the regulation of these diverse expression changes in various tissue types were predicted. The spatial transcriptomes presented here provide novel insight into the molecular mechanisms of metal homeostasis.
- The New phytologist.New Phytol.2014 Feb;201(3):781-94. doi: 10.1111/nph.12577. Epub 2013 Nov 5.
- Although the genes involved in metal homeostasis have been investigated over the past few decades, many genes related to metal homeostasis remain uncharacterized, and a comprehensive analysis of the expression of these genes is required. In the present study, we investigated the spatial gene express
- PMID 24188410
- Sites of Action of Elevated CO2 on Leaf Development in Rice: Discrimination between the Effects of Elevated CO2 and Nitrogen Deficiency.
- Tsutsumi K, Konno M, Miyazawa SI, Miyao M.Author information Functional Plant Research Unit, National Institute of Agrobiological Sciences, Kannondai, Tsukuba 305-8602, Japan.AbstractElevated CO2 concentrations (eCO2) trigger various plant responses. Despite intensive studies of these responses, the underlying mechanisms remain obscure. In this work, we investigated when and how leaf physiology and anatomy are affected by eCO2 in rice plants. We analyzed most recently fully expanded leaves that developed successively after the plant transfer to eCO2. To discriminate between the effects of eCO2 and those of nitrogen deficiency, we used three different levels of N application. We found that a decline in the leaf soluble protein content (on a leaf area basis) at eCO2 was only observed under N deficiency. The length and width of the leaf blade were reduced by both eCO2 and N deficiency, whereas the blade thickness was increased by eCO2 but was not affected by N deficiency. The change in length by eCO2 became detectable in the secondly fully expanded leaf, and those in width and thickness in the thirdly fully expanded leaf, which were at the leaf developmental stages P4 and P3, respectively, at the onset of the eCO2 treatment. The decreased blade length at eCO2 was associated with a decrease in the epidermal cell number on the adaxial side and a reduction in cell length on the abaxial side. The decreased width resulted from decreased numbers of small vascular bundles and epidermal cell files. The increased thickness was ascribed mainly to enhanced development of bundle sheath extensions at the ridges of vascular bundles. These observations enable us to identify the sites of action of eCO2 on rice leaf development.
- Plant & cell physiology.Plant Cell Physiol.2014 Jan 8. [Epub ahead of print]
- Elevated CO2 concentrations (eCO2) trigger various plant responses. Despite intensive studies of these responses, the underlying mechanisms remain obscure. In this work, we investigated when and how leaf physiology and anatomy are affected by eCO2 in rice plants. We analyzed most recently fully expa
- PMID 24406628
- Fibroblast growth factor-2 and vascular endothelial growth factor mediated augmentation of angiogenesis and bone formation in vascularized bone allotransplants.
- Larsen M, Willems WF, Pelzer M, Friedrich PF, Dadsetan M, Bishop AT.Author information Department of Orthopedic Surgery, Microvascular Research Laboratory, Mayo Clinic, Rochester, MN.AbstractWe previously demonstrated recipient-derived neoangiogenesis to maintain viability of living bone allogeneic transplants without long-term immunosuppression. The effect of cytokine delivery to enhance this process is studied. Vascularized femur transplantation was performed from Dark Agouti to Piebald Virol Glaxo rats. Poly(d,l-lactide-co-glycolide) microspheres loaded with buffer (N = 11), basic fibroblast growth factor (FGF2) (N = 10), vascular endothelial growth factor (VEGF) (N = 11), or both (N = 11) were inserted intramedullarly alongside a recipient-derived arteriovenous bundle. FK-506 was administered for 2 weeks. At 18 weeks, bone blood flow, microangiography, histologic, histomorphometric, and alkaline phosphatase measurements were performed. Bone blood flow was greater in the combined group than control and VEGF groups (P = 0.04). Capillary density was greater in the FGF2 group than in the VEGF and combined groups (P < 0.05). Bone viability, growth, and alkaline phosphatase activity did not vary significantly between groups. Neoangiogenesis in vascularized bone allotransplants is enhanced by angiogenic cytokine delivery, with results using FGF2 that are comparable to isotransplant from previous studies. Further studies are needed to achieve bone formation similar to isotransplants. © 2014 Wiley Periodicals, Inc. Microsurgery, 2014.
- Microsurgery.Microsurgery.2014 Jan 3. doi: 10.1002/micr.22221. [Epub ahead of print]
- We previously demonstrated recipient-derived neoangiogenesis to maintain viability of living bone allogeneic transplants without long-term immunosuppression. The effect of cytokine delivery to enhance this process is studied. Vascularized femur transplantation was performed from Dark Agouti to Pieba
- PMID 24395434
Japanese Journal
- ダイコンに含有される硝酸イオンおよびビタミンCの部位局在性と施肥方法がこれら含量に及ぼす影響
- 渡邉 章子,中根 一恵,今井 克彦,大羽 和子
- 日本食品科学工学会誌 60(4), 179-183, 2013
- (1)ダイコンのNO<SUB>3</SUB><SUP>-</SUP>は,上部に比べて顕著に下部に局在し,VCはNO<SUB>3</SUB><SUP>-</SUP>含量の少ない上部に多く存在した.<BR>(2)全施肥窒素量を多く施用されたダイコンほどNO<SUB>3</SUB …
- NAID 130003367992
- Characterization of 5-Hydroxyconiferaldehyde O-Methyltransferase in Oryza sativa
- Koshiba Taichi,Hirose Norie,Mukai Mai,Yamamura Masaomi,Hattori Takefumi,Suzuki Shiro,Sakamoto Masahiro,Umezawa Toshiaki
- Plant Biotechnology, 2013
- … A rice plant in which OsCOMT1 expression was downregulated exhibited weakened cell wall staining with Wiesner reagent in vascular bundle cells and sclerenchyma tissue, compared with wild-type plants. …
- NAID 130003362428
Related Links
- vascular bundle 《植物》維管束 - アルクがお届けする進化するオンライン英和・和英辞書データベース。一般的な単語や連語から、イディオム、専門用語、スラングまで幅広く収録。 ... 英和・和英 対訳データオンライン検索サービス
- Generally, the patterns of the leaf veins, or vascular bundle s (which can be seen readily by holding the specimen up to a strong light), are pinnate, and the veins are free; that is, they all diverge and never coalesce, either along their ...
Related Pictures
★リンクテーブル★
[★]
- 英
- vascular bundle、fibrovascular bundle、vascular
- 関
- 血管、血管性、脈管
[★]
維管束系
- 関
- fibrovascular system、vascular system
[★]
維管束
- 関
- vascular、vascular bundle
[★]
維管束鞘
- 関
- bundle sheath
[★]
- 関
- angio、blood vessel、fibrovascular bundle、vascular bundle、vasculogenic、vein、vessel
[★]
- 関
- fascicle、fasciculi、fasciculus