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Publication Type J
Authors AYALA, F; OLEARY, JW
Author Full Name AYALA, F; OLEARY, JW
Title GROWTH AND PHYSIOLOGY OF SALICORNIA BIGELOVII TORR AT SUBOPTIMAL SALINITY
Source INTERNATIONAL JOURNAL OF PLANT SCIENCES
Language English
Document Type Article
Keywords Plus SALT TOLERANCE; PLANT-GROWTH; HALOPHYTES; WATER; PHOTOSYNTHESIS; SUCCULENT; SEAWATER; SODIUM
Abstract Salicornia bigelovii Torr. plants were grown in 5, 200, or 600 mol m(-3) NaCl, representing suboptimal, optimal, and supraoptimal salinities, respectively. Shoot fresh and dry mass of plants grown at optimal salinity were more than 2 x higher than those grown at the other two salinities. In spite of the comparable growth reductions at sub- and supraoptimal salinities, the physiological responses, and presumably the causes of the growth reductions, were not the same at those two salinities. Water and osmotic potentials of the shoots decreased significantly with increasing salinity, but turgor potentials did not differ significantly among treatments. Differences in photosynthetic rates were not consistent with the differences in growth. Rates were significantly higher in plants grown at 5 mol m(-3) NaCl when expressed relative to photosynthetic area, but when photosynthesis was expressed relative to the amount of chlorophyll, no significant differences were found among salinities. Stomatal conductance decreased with increasing salinity, resulting in a significantly higher transpiration rate at the lowest salinity than at the other two levels. Dark respiration was not significantly affected by salinity. Sodium concentration in shoots and roots increased with salinity. Potassium, calcium, and magnesium were highly concentrated in shoots and roots of plants grown at 5 mol m(-3) NaCl. Excessive NaCl, however, induced calcium and magnesium deficiencies in plants grown at supraoptimal salinity.
Author Address UNIV ARIZONA,COLL AGR,DEPT PLANT SCI,TUCSON,AZ 85721
Times Cited 83
Total Times Cited Count (WoS, BCI, and CSCD) 93
Publisher UNIV CHICAGO PRESS
Publisher City CHICAGO
Publisher Address 5720 S WOODLAWN AVE, CHICAGO, IL 60637
ISSN 1058-5893
29-Character Source Abbreviation INT J PLANT SCI
ISO Source Abbreviation Int. J. Plant Sci.
Publication Date MAR
Year Published 1995
Volume 156
Issue 2
Beginning Page 197
Ending Page 205
Digital Object Identifier (DOI) 10.1086/297241
Page Count 9
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number QP282
Unique Article Identifier WOS:A1995QP28200007
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