Water deficit effect on ABA accumulation in leaves of two Phaseolus species that differ in drought tolerance

Conference · Wed May 01 00:00:00 EDT 1991 · Plant Physiology, Supplement; (United States)

OSTI ID:5514065

Janssen, M G; Markhart, A H ^[1]

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1. Univ. of Minnesota, St. Paul (United States)

Phaseolus acutifolius Gray (Pa) is regarded as a dehydration postponer and has stomata that are more sensitive to low leaf water potential than P. vulgaris L. (Pv). This study was designed to determine if the greater sensitivity of Pa stomata is related to greater ABA concentration in Pa or to a greater sensitivity of Pa stomata to ABA. To test these hypotheses bulk leaf ABA accumulation was measured and the sensitivity to ABA was monitored using epidermal strips. To determine if part of the ABA accumulated in the leaves is produced in the roots a novel detached leaf system was used. Stomatal behavior and ABA accumulation at low leaf water potential was monitored and compared to intact leaves. The results of these experiments and the usefulness of the detached leaf system are discussed.

• OSTI ID: 5514065
• Report Number(s): CONF-9107184-; CODEN: PPYSA
• Journal Information: Plant Physiology, Supplement; (United States), Vol. 96:1; Conference: Annual meeting of the American Society of Plant Physiology, Albuquerque, NM (United States), 28 Jul - 1 Aug 1991; ISSN 0079-2241
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
54 ENVIRONMENTAL SCIENCES
ABSCISIC ACID
BIOLOGICAL ACCUMULATION
DROUGHTS
ENVIRONMENTAL EFFECTS
PHASEOLUS
BIOLOGICAL STRESS
PHYSIOLOGY
LEAVES
STOMATA
TOLERANCE
AUXINS
CARBOXYLIC ACIDS
LEGUMINOSAE
MAGNOLIOPHYTA
MAGNOLIOPSIDA
MONOCARBOXYLIC ACIDS
OPENINGS
ORGANIC ACIDS
ORGANIC COMPOUNDS
PLANT GROWTH REGULATORS
PLANTS
551000* - Physiological Systems
540210 - Environment
Terrestrial- Basic Studies- (1990-)