Presence of chloride reduces malate production in epidermis during stomatal opening
When stomata of isolated epidermis of Vicia faba are allowed to open in the presence of K/sup +/ and iminodiacetate (an impermeant zwitterion), malate is formed in the epidermis; the increases in malate content follow a nearly linear relationship with stomatal aperture. Stomata of leaf sections of V. faba floated on water during opening also exhibit this relationship. When isolated epidermis is offered KCl, this relationship is not observed and less malate is detected at comparable stomatal apertures. The data indicate that Cl/sup -/, if present at concentrations greater than or equal to 10/sup -5/ eq liter/sup -1/, can partially satisfy the anion requirement of guard cells of V. faba during stomatal opening. Discrepancies between earlier reports on the relative roles Cl/sup -/ and malate play as counterions for K/sup +/ in guard cells of V. faba could now be explained as resulting from variations in the availability of Cl/sup -/ to guard cells.
- Research Organization:
- Michigan State Univ., East Lansing
- OSTI ID:
- 6743931
- Journal Information:
- Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 61:3; ISSN PLPHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
551000 -- Physiological Systems
59 BASIC BIOLOGICAL SCIENCES
ALKALI METAL COMPOUNDS
ALKALI METALS
BIOMASS
BODY
CHARGED PARTICLES
CHLORIDES
CHLORINE COMPOUNDS
CLEARANCE
ELEMENTS
ENERGY SOURCES
EPIDERMIS
EPITHELIUM
EXCRETION
HALIDES
HALOGEN COMPOUNDS
IN VITRO
IONS
LEAVES
LEGUMINOSAE
METABOLISM
METALS
OPENINGS
ORGANS
OSMOSIS
PHYSIOLOGY
PLANT CELLS
PLANTS
POTASSIUM
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
RENEWABLE ENERGY SOURCES
SKIN
STOMATA
TISSUES
VICIA