Guard cell photosynthesis and stomatal function
نویسندگان
چکیده
منابع مشابه
Mesophyll photosynthesis and guard cell metabolism impacts on stomatal behaviour.
Stomata control gaseous fluxes between the internal leaf air spaces and the external atmosphere. Guard cells determine stomatal aperture and must operate to ensure an appropriate balance between CO2 uptake for photosynthesis (A) and water loss, and ultimately plant water use efficiency (WUE). A strong correlation between A and stomatal conductance (gs ) is well documented and often observed, bu...
متن کاملStomatal Movement and Photosynthesis in Pelargonium. Ii. Effects of Water Deficit and of Chloroform: Photosynthesis in Guard Cells.
This paper describes the second half of a series of tests of the photosynthetic theory of stomatal movement. A corollary of this theory is that any agent that inhibits photosynthesis should prevent opening or cause closure in light-unless some other action prevents this. It has been reported that this relationship does not hold either in wilting or under the action of chloroform (WILSON, 14). T...
متن کاملReductions in mesophyll and guard cell photosynthesis impact on the control of stomatal responses to light and CO2
Transgenic antisense tobacco plants with a range of reductions in sedoheptulose-1,7-bisphosphatase (SBPase) activity were used to investigate the role of photosynthesis in stomatal opening responses. High resolution chlorophyll a fluorescence imaging showed that the quantum efficiency of photosystem II electron transport (F(q)(')/F(m)(')) was decreased similarly in both guard and mesophyll cell...
متن کاملStomatal Function Requires Pectin De-methyl-esterification of the Guard Cell Wall
Stomatal opening and closure depends on changes in turgor pressure acting within guard cells to alter cell shape [1]. The extent of these shape changes is limited by the mechanical properties of the cells, which will be largely dependent on the structure of the cell walls. Although it has long been observed that guard cells are anisotropic due to differential thickening and the orientation of c...
متن کاملGuard cell starch concentration quantitatively related to stomatal aperture.
Using quantitative histochemical techniques, the carbohydrate levels of guard cells from open and closed stomatal apparatus of Vicia faba L. were compared. To minimize experimental error, all comparisons were between leaflets of the same pair. Stomata on one leaflet were caused to open by light and reduced CO(2). The other leaflet, which was in darkness, had closed stomata. In one experiment, d...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 2008
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.2008.02685.x