Movement of abscisic acid into the apoplast in response to water stress in Xanthium strumarium L

Journal Article · Mon Jul 01 04:00:00 EDT 1985 · Plant Physiol.; (United States)

DOI:https://doi.org/10.1104/pp.78.3.623· OSTI ID:6024567

Cornish, K; Zeevaart, J A.D.

The effect of water stress on the redistribution of abscisic acid (ABA) in mature leaves of Xanthium strumarium L. was investigated using a pressure dehydration technique. In both turgid and stressed leaves, the ABA in the xylem exudate, the apoplastic ABA, increased before bulk leaf stress-induced ABA accumulation began. In the initially turgid leaves, the ABA level remained constant in both the apoplast and the leaf as a whole until wilting symptoms appeared. Following turgor loss, sufficient quantities of ABA moved into the apoplast to stimulate stomatal closure. Thus, the initial increase of apoplastic ABA may be relevant to the rapid stomatal closure seen in stressed leaves before their bulk leaf ABA levels rise. Following recovery from water stress, elevated levels of ABA remained in the apoplast after the bulk leaf contents had returned to their prestress values. This apoplastic ABA may retard stomatal reopening during the initial recovery period. 32 references, 5 figures.

• Research Organization: Michigan State Univ., East Lansing
• DOE Contract Number: AC02-76ER01338
• OSTI ID: 6024567
• Journal Information: Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 78:3; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

551000* -- Physiological Systems
59 BASIC BIOLOGICAL SCIENCES
ABSCISIC ACID
AUXINS
BIOLOGICAL EFFECTS
BIOLOGICAL STRESS
CARBOXYLIC ACIDS
DIFFUSION
DISTRIBUTION
HYDROGEN COMPOUNDS
LEAVES
MONOCARBOXYLIC ACIDS
OPENINGS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OSMOSIS
OXYGEN COMPOUNDS
PLANT GROWTH REGULATORS
PLANTS
STOMATA
TISSUE DISTRIBUTION
WATER