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

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Biologia Plantarum

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.

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Abbreviations

NAR:

net assimilation rate

RGR:

relative growth rate

RWC:

relative water content

WUE:

water use efficiency

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Authors and Affiliations

  1. Department of Biology, Tarbiat Moalem University, No. 49, Dr Mofatteh Ave, 15614, Tehran, Iran

    M. Ghorbanli & R. A. Khavari Nejad

  2. Department of Genetic and Physiology, Research Institute of Forest and Rangelands, 13185, Tehran, Iran

    G. Karimi, H. Heidari & M. H. Assareh

Authors
  1. G. Karimi
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  2. M. Ghorbanli
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  3. H. Heidari
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  4. R. A. Khavari Nejad
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  5. M. H. Assareh
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Correspondence to G. Karimi.

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Karimi, G., Ghorbanli, M., Heidari, H. et al. The effects of NaCl on growth, water relations, osmolytes and ion content in Kochia prostrata . Biol Plant 49, 301–304 (2005). https://doi.org/10.1007/s10535-005-1304-y

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  • DOI: https://doi.org/10.1007/s10535-005-1304-y

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