Light Quality and Osmoregulation in Vicia Guard Cells
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چکیده
منابع مشابه
Sugar and Organic Acid Accumulation in Guard Cells of Vicia faba in Response to Red and Blue Light.
Changes in neutral sugar and organic acid content of guard cells were quantitated by high-performance liquid chromatography during stomatal opening in different light qualities. Sonicated Vicia faba epidermal peels were irradiated with 10 [mu]mol m-2 s-1 of blue light, a fluence rate insufficient for the activation of guard cell photosynthesis, or 125 [mu]mol m-2 s-1 of red light, in the presen...
متن کاملProfile of Basic Carbon Pathways in Guard Cells and Other Leaf Cells of Vicia faba L.
Guard cells and three other cell types from Vicia faba L. ;Longpod' leaflets were assayed for enzymes that catalyze one step in each of five major carbon pathways in green plants: the photosynthetic carbon reduction pathway (ribulose-bisphosphate carboxylase, EC 4.1.1.39), the photosynthetic carbon oxidation pathway (hydroxypyruvate reductase, EC 1.1.1.81), glycolysis ([NAD] glyceraldehyde-P de...
متن کاملTetrazolium Reduction by Guard Cells in Abaxial Epidermis of Vicia faba: Blue Light Stimulation of a Plasmalemma Redox System.
The stomata in the abaxial epidermis of Vicia faba were examined for the location of redox systems using tetrazolium salts. Three distinct redox systems could be demonstrated: chloroplast, mitochondrial, and plasmalemma. The chloroplast activity required light and NADP. Mitochondrial activity required added NADH and was suppressed by preincubation with KCN. The plasmalemma redox system in guard...
متن کاملLight Activation of NADP-Malate Dehydrogenase in Guard Cell Protoplasts from Vicia faba L.
Light-induced swelling of guard cell protoplasts (GCP) from Vicia faba was accompanied by increases in content of K(+) and malate. DCMU inhibited the increase of K(+) and malate, and consequently swelling.Effect of light on the activity of selected enzymes that take part in malate formation was studied. When isolated GCP were illuminated, NADP-malate dehydrogenase (NADP-MDH) was activated, and ...
متن کاملCentral Roles for Potassium and Sucrose in Guard-Cell Osmoregulation.
Osmoregulation in guard cells of intact, attached Vicia faba leaves grown under growth chamber and greenhouse conditions was studied over a daily light cycle of stomatal movements. Under both growth conditions guard cells had two distinct osmoregulatory phases. In the first (morning) phase, opening was correlated with K+ uptake and, to a lesser extent, sucrose accumulation. In the second (after...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1988
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.88.3.887