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Publication Type J
Authors Lin, H; Wu, L
Author Full Name Lin, H; Wu, L
Title Effects of salt stress on root plasma membrane characteristics of salt-tolerant and salt-sensitive buffalograss clones
Source ENVIRONMENTAL AND EXPERIMENTAL BOTANY
Language English
Document Type Article
Author Keywords buffalograss; plasma membrane; ATPase; phospholipid; salt-tolerance
Keywords Plus FATTY-ACID DESATURATION; LIPID-COMPOSITION; H+-ATPASE; HORDEUM-VULGARE; HIGHER-PLANTS; PARTITION; SALINITY; NACL; CYANOBACTERIUM; PHOSPHOLIPIDS
Abstract To test the hypothesis that differences in plasma membrane chemical characters exist between a salt-tolerant and a salt-sensitive buffalograss clone, plasma membrane H+-ATPase activity, membrane phospholipid composition, and corresponding fatty acyl chains were studied for root plasma membrane of two buffalograss (Buchloe dactyloides (Nutt.)) clones, Salt stress caused greater reductions of plasma membrane H+-ATPase activity and total plasma membrane protein concentration in the salt-sensitive buffalograss clone than in the salt-tolerant clone. Salt stress also reduced the amount of plasma membrane phospholipid per gram fresh weight. Fatty acyl chains derived from five phospholipids including phosphatidyl ethanolamine (PE), phosphatidyl glycerol (PG), phosphatidyl choline (PC), phosphatidyl serine (PS) and phosphatidyl inositol (PI) were determined. Salt stress caused a greater reduction, especially of the strong anionic phospholipids (PS and PI), in the salt-sensitive clone than in the salt-tolerant clone. Under conditions without salt stress, the unsaturated fatty acids including C14:1, C18:1 and C18:3 found in the salt-tolerant clone were not detected in the salt-sensitive clone. A double bond index (DBI) (number of double bonds per mole) was used to measure the degree of unsaturation of fatty acids. Under conditions without salt stress, the salt tolerant clone had a DBI of 0.23. Salt stress caused a greater increase of DBI in the salt-tolerant clone than in the salt-sensitive one. The present study documented a difference in salt stress response at the plasma membrane lipid metabolism level between salt tolerant and salt-sensitive buffalograss clones. These plasma membrane chemical characteristics may be at least partially responsible for the salt-tolerance in this species.
Reprint Address Lin, H (reprint author), UNIV CALIF DAVIS,DEPT ENVIRONM HORT,DAVIS,CA 95616, USA.
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Cited Reference Count 54
Times Cited 21
Total Times Cited Count (WoS, BCI, and CSCD) 23
Publisher PERGAMON-ELSEVIER SCIENCE LTD
Publisher City OXFORD
Publisher Address THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
ISSN 0098-8472
29-Character Source Abbreviation ENVIRON EXP BOT
ISO Source Abbreviation Environ. Exp. Bot.
Publication Date OCT
Year Published 1996
Volume 36
Issue 3
Beginning Page 239
Ending Page &
Digital Object Identifier (DOI) 10.1016/0098-8472(96)01025-8
Page Count 15
Web of Science Category Plant Sciences; Environmental Sciences
Subject Category Plant Sciences; Environmental Sciences & Ecology
Document Delivery Number VJ709
Unique Article Identifier WOS:A1996VJ70900001
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