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Publication Type J
Authors Kamel, M.
Title Osmotic adjustment in three succulent species of Zygophyllaceae
Source African Journal of Ecology
Author Keywords adjustment; drought; salinity; stress; Zygophyllum salt tolerance; water-stress; chemical-composition; amino-acids; halophytes; plants; salinity; proline; growth; leaf
Abstract Three species, Zygophyllum album L., Z. coccineum L. and Z. simplex L., from family Zygophyllaceae were collected from two locations in Egypt to study their response to environmental conditions. Organic solutes (amino acids, soluble proteins and soluble sugars) and inorganic solutes (Na+, K+, Ca2+, Mg2+, Cl-, PO43- and SO42-) were estimated to study their role in osmotic adjustment under the effect of drought and salinity. The study showed that Z. coccineum is most tolerant for drought and salinity than Z. simplex. Z. coccineum was dependent on soluble proteins and soluble sugars, to increase its content of bound water, to undergo water deficit in desert. Z. simplex accumulated inorganic solutes more than Z. coccineum and less organic solutes. Amino acids content increased in Z. coccineum and Z. simplex survived in saline conditions to play a role in osmotic adjustment. Under the effect of salinity, all the studied species showed a tendency and high capacity to accumulate inorganic solutes. The main inorganic salutes were Ca2+, Mg2+ and Cl-. The role of Na+ was less than Ca2+ and Mg2+. Z. album and Z. simplex preferred Mg2+ more than Z. coccineum which preferred Ca2+.
Author Address S Valley Univ, Fac Sci Qena, Dept Bot, Qena, Egypt. Kamel, M, S Valley Univ, Fac Sci Qena, Dept Bot, Qena, Egypt. mohamed-kamell@lycos.com
29-Character Source Abbreviation Afr. J. Ecol.
Publication Date Mar
Year Published 2008
Volume 46
Issue 1
Beginning Page 96-104
Unique Article Identifier ISI:000252928100015
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