Low proton conductance of plant cuticles and its relevance to the acid-growth theory

Journal Article · Tue Sep 01 04:00:00 EDT 1981 · Plant Physiol.; (United States)

DOI:https://doi.org/10.1104/pp.68.3.664· OSTI ID:6221329

Dreyer, S A; Seymour, V; Cleland, R E

Evidence obtained on the relation between the pH of the medium and the growth of intact stem sections is compatible with the acid-growth theory only if the proton conductance of the cuticle is an effective barrier to the entry or exit of protons from the tissue. By measuring the rate at which protons cross frozen-thawed epidermal strips of sunflower (Helianthus annus L.) and soybean hypocotyls (Glycine max Morr.) and enzymically isolated cuticles of Berberis aquifolium Persh. and tomato (Lycopersicum esculentum Mill.) fruit, we have now demonstrated the low proton conductance of the cuticular layer. Unless the conductance is enhanced by abrasion of the cuticle or by removal of the cuticular waxes, proton movement into and out of a tissue across the cuticle will be significant only over long time periods.

• Research Organization: Univ. of Washington, Seattle
• OSTI ID: 6221329
• Journal Information: Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 68:3; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

550200 -- Biochemistry
551000* -- Physiological Systems
59 BASIC BIOLOGICAL SCIENCES
ANIMAL TISSUES
BARYONS
BODY
CHEMICAL REACTIONS
DECOMPOSITION
DEWAXING
ELEMENTARY PARTICLES
EPIDERMIS
EPITHELIUM
FERMIONS
FOOD
GROWTH
HADRONS
NUCLEONS
ORGANS
PERMEABILITY
PH VALUE
PLANT GROWTH
PLANT STEMS
PLANTS
PROTEOLYSIS
PROTONS
SEPARATION PROCESSES
SKIN
SOYBEANS
SUNFLOWERS
TISSUES
TOMATOES
VEGETABLES