Release of Malate from Epidermal Strips during Stomatal Closure.
نویسندگان
چکیده
Isolated epidermal strips of Vicia faba and Commelina communis release malate into their bathing medium when stomata close. This release was largest (about 0.6 of the initial malate content) when epidermal strips of C. communis were floated on 10(-5) M (+/-)-abscisic acid.
منابع مشابه
Potassium Chloride as Stomatal Osmoticum in Ailium cepa L., a Species Devoid of Starch in Guard
K+ and Clr contents of guard cells and of ordinary epidermal cells were determined in epidermal samples of Alium cepa L. by electron probe microanalysis; malate contents of the same samples were determined by enzymic oxidation. KCI was, in general, the major osmoticum in guard cells, irrespective of whether stomata had opened on leaves or in epidermal strips floating on solutions. The solute re...
متن کاملLight and Stomatal Metabolism : II. Effects of Sulfite and Arsenite on Stomatal Opening and Light Modulation of Enzymes in Epidermis.
The effect of sulfite and arsenite on stomatal opening and light modulation of enzymes was examined in isolated epidermal strips of Pisum sativum L. var Little Marvel leaves. Sulfite or arsenite at 10 micromolar rapidly inhibited the stomatal opening process in light. Light activation of phosphoenolpyruvate carboxylase and NADP-malate dehydrogenase was completely diminished when the epidermal s...
متن کاملI. Possible Involvement of Light Modulation of Enzymes in Stomatal Movement
New evidence is provided regarding the direct effect of light on stomatal opening in the epidermis of the pea (Pisum sativwn L. var Little Marvel) leaf. Lght modulates the activity of a number of key enzymes involved in stomatal metabolism. When Isolated epidermal strips are illuminated, phosphoenolpyruvate carboxylase, NADP-malate dehydrogenase, and NADP-isocltrate debydrogenase are activated;...
متن کاملLight and stomatal metabolism : I. Possible involvement of light modulation of enzymes in stomatal movement.
New evidence is provided regarding the direct effect of light on stomatal opening in the epidermis of the pea (Pisum sativum L. var Little Marvel) leaf. Light modulates the activity of a number of key enzymes involved in stomatal metabolism. When isolated epidermal strips are illuminated, phosphoenolpyruvate carboxylase, NADP-malate dehydrogenase, and NADP-isocitrate dehydrogenase are activated...
متن کاملAvailability of Chloride Affects the Balance between Potassium Chloride and Potassium Malate in Guard Cells of Vicia faba L.
Electron probe microanalysis for K and Cl and enzymic determination of malate were performed on epidermal strips of Vicia faba L. which had been incubated with 0.1 equivalent of K(+) per liter in the absence or presence of Cl(-). In the absence of Cl(-), iminodiacetate, a presumed impermeant zwitterion, served as anion. With no Cl(-) in the medium, 91% of the K(+) imported into the guard cells ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Plant physiology
دوره 61 3 شماره
صفحات -
تاریخ انتشار 1978