The effects of NaCl on growth, water relations, osmolytes and ion content in Kochia prostrata

Assareh, Mohammad Hassan. and Khavari Nejad, Ramazan Ali. and Heidari, Hamideh. and Ghorbanli, Mahlagha. and Karimi, Gholamreza. (2005) The effects of NaCl on growth, water relations, osmolytes and ion content in Kochia prostrata. Biologia Plantarum, 49 (2).

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Abstract

The effects of NaCl (0, 50, 100, 150 and 200 mM) on growth, water relations, glycinebetaine, free proline, ion contents, stomata number and size of Kochia prostrata (L.) Schard were determined. Shoot and root fresh and dry matter, root and shoot length, relative growth rate, net assimilation rate, relative water content, water use efficiency, soluble sugars and glycinebetaine contents were not changed at low NaCl concentrations, but they were significantly decreased at 200 mM NaCl. The K+, Mg2+ and Ca2+ contents, water potential, chlorophyll a+b and carotenoides contents, and stomata number and size were reduced already at low concentrations of NaCl. In contrast, the Na+, Cl− and proline contents increased several times with increasing NaCl concentration. Kochia prostrata is a salt tolerant species, the optimal growth of this plant occurred up to 150 mM NaCl. The mechanisms of salt tolerance in the plant may be balance among ion accumulation and production of glycinebetaine, proline, soluble sugars for maintenance of pressure potential.

Item Type: Article
Uncontrolled Keywords: glycinebetaine halophyte proline stomata number and size salt stress salt tolerance water use efficiency
Subjects: W General medicine- Health professions
Divisions: Faculty of Nursing and Midwifery
Reserach Vice-Chancellar Department > Social Determinants of Health Research Center
Depositing User: zahra bagheri .
Date Deposited: 16 Oct 2017 04:49
Last Modified: 24 Jul 2018 03:33
URI: http://eprints.skums.ac.ir/id/eprint/5955

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