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Title: Osmotic adjustment and the growth response of seven vegetable crops following water-deficit stress. [Phaseolus vulgaris L. ; Beta vulgaris L. ; Abelmoschus esculentus; Pisum sativum L. ; Capsicum annuum L. ; Spinacia oleracea L. ; Lycopersicon esculentum Mill]

Growth-chamber studies were conducted to examine the ability of seven vegetable crops- Blue Lake beam (Phaseolus vulgaris L.) Detroit Dark Red beet (Beta vulgaris L.) Burgundy okra (Abelmoschus esculentus) (Moench), Little Marvel pea (Pisum sativum L), California Wonder bell pepper (Capsicum annuum L), New Zealand spinach (Spinacia oleracea L), and Beefsteak tomato (Lycopersicon esculentum Mill.) - to adjust osmotically in response to water-deficit stress. Water stress was imposed by withholding water for 3 days, and the adjustment of leaf and root osmotic potentials upon relief of the stress and rehydration were monitored with thermocouple psychrometers. Despite similar reductions in leaf water potential and stomatal conductance among the species studied reductions in lead water potential an stomatal conductance among the species, crop-specific differences were observed in leak and root osmotic adjustment. Leaf osmotic adjustment was observed for bean, pepper, and tomato following water-deficit stress. Root osmotic adjustment was significant in bean, okra, pea and tomato. Furthermore, differences in leaf and root osmotic adjustment were also observed among five tomato cultivars. Leaf osmotic adjustment was not associated with the maintenance of leaf growth following water-deficit stress, since leaf expansion of water-stressed bean and pepper, two species capable of osmotic adjustment, was similarmore » to that of spinach, which exhibited no leaf osmotic adjustment.« less
Authors:
 [1] ;  [2]
  1. (Oak Ridge National Lab., TN (United States))
  2. (Univ. of Arkansas, Fayetteville (United States))
Publication Date:
OSTI Identifier:
5826248
DOE Contract Number:
AC05-84OR21400
Resource Type:
Journal Article
Resource Relation:
Journal Name: Hortscience; (United States); Journal Volume: 26:9
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CROPS; PLANT GROWTH; DROUGHTS; ENVIRONMENTAL EFFECTS; BIOLOGICAL STRESS; LEAVES; OSMOSIS; PEPPERS; PHASEOLUS; PISUM; ROOTS; SPINACH; TOMATOES; DIFFUSION; FOOD; FRUITS; GROWTH; LEGUMINOSAE; MAGNOLIOPHYTA; MAGNOLIOPSIDA; PLANTS; VEGETABLES 540110*