- 関
- symplast
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出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2016/02/04 11:12:59」(JST)
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The apoplastic and symplastic pathways
The symplast of a plant is the inner side of the plasma membrane in which water (and low-molecular-weight solutes) can freely diffuse.
The plasmodesmata allow the direct flow of small molecules such as sugars, amino acids, and ions between cells. Larger molecules, including transcription factors and plant viruses, can also be transported through with the help of actin structures.
This allows direct cytoplasm-to-cytoplasm flow of water and other nutrients along concentration gradients. In particular, it is used in the root systems to bring in nutrients from soil. It moves these solutes from epidermis cells through the cortex into the endodermis and eventually the pericycle, where it can be moved into the xylem for long distance transport. It is contrasted with the apoplastic flow, which uses cell wall transport.
See also
- Apoplast
- Plant sap
- Polar auxin transport, a type of cell-to-cell transport
- Protoplast
- Tonoplast
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English Journal
- Bark water uptake promotes localized hydraulic recovery in coastal redwood crown.
- Earles JM1,2, Sperling O1, Silva LC3, McElrone A4,5, Brodersen C6, North M1,7, Zwieniecki M1.
- Plant, cell & environment.Plant Cell Environ.2015 Jul 15. doi: 10.1111/pce.12612. [Epub ahead of print]
- Coastal redwood (Sequoia sempervirens), the world's tallest tree species, rehydrates leaves via foliar water uptake during fog/rain events. Here we examine if bark also permits water uptake in redwood branches, exploring potential flow mechanisms and biological significance. Using isotopic labeling
- PMID 26178179
- Extradigital Symplastic Glomus Tumor of the Hand: Report of 2 Cases and Literature Review.
- Sandoval M1, Carrasco-Zuber J, Gonzalez S.
- The American Journal of dermatopathology.Am J Dermatopathol.2015 Jul;37(7):560-2. doi: 10.1097/DAD.0000000000000132.
- Glomus tumor is a rather common tumor of the hand, which presents with a classic triad of symptoms of high temperature, sensitivity and pain, and localized tenderness. Most glomus tumors are located in the digits, especially in subungueal areas. However, extradigital tumors are less frequent, and li
- PMID 25051107
- Aluminium alleviates manganese toxicity to rice by decreasing root symplastic Mn uptake and reducing availability to shoots of Mn stored in roots.
- Wang W1, Zhao XQ2, Hu ZM1, Shao JF1, Che J1, Chen RF2, Dong XY2, Shen RF3.
- Annals of botany.Ann Bot.2015 Jun 22. pii: mcv090. [Epub ahead of print]
- BACKGROUND AND AIMS: Manganese (Mn) and aluminium (Al) phytotoxicities occur mainly in acid soils. In some plant species, Al alleviates Mn toxicity, but the mechanisms underlying this effect are obscure.METHODS: Rice (Oryza sativa) seedlings (11 d old) were grown in nutrient solution containing di
- PMID 26105187
Japanese Journal
- A new method for evaluating symplastic cadmium absorption in the roots of Solanum melongena using enriched isotopes ^<113>Cd and ^<114>Cd(Plant Nutrition)
- MORI Shinsuke,KAWASAKI Akira,ISHIKAWA Satoru,ARAO Tomohito
- Soil science and plant nutrition 55(2), 294-299, 2009-04
- … Radioisotope techniques are well known as methods for evaluating symplastic ion absorption in roots. … In the present study, a new method for evaluating symplastic cadmium (Cd) absorption in plant roots was developed using the enriched isotopes ^<113>Cd and ^<114>Cd. … We tested the validity of our method for evaluating symplastic Cd in roots compared with the conventional method based on differences in the amount of Cd absorbed at 2℃ and 25℃ using unlabeled Cd. …
- NAID 110007522812
- Changes in the ascorbate metabolism of apoplastic and symplastic spaces are associated with cell differentiation
Related Links
- symplast (ˈsɪmplæst) n 1. (Botany) botany the continuous system of protoplasts, linked by plasmodesmata and bounded by the cell wall symˈplastic adj ... It is believed that, inside the plant, most metals are too insoluble to move ...
- symplast (ˈsɪmplæst) n 1. (Botany) botany the continuous system of protoplasts, linked by plasmodesmata and bounded by the cell wall symˈplastic adj ... However, the leaf's symplast acidification presumably activates the redox ...
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- 英
- symplast、symplastic
- 関
- シンプラスト
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- 英
- symplast、symplastic
- 関
- 共原形質体
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- 関
- symplastic