Effect of Calcium/Sodium Ratio on Growth and Ion Relations of Alfalfa (<I>Medicago sativa </I>L.) Seedling Grown under Saline Condition
Titel:
Effect of Calcium/Sodium Ratio on Growth and Ion Relations of Alfalfa (<I>Medicago sativa </I>L.) Seedling Grown under Saline Condition
Auteur:
S.A. Al-Khateeb
Verschenen in:
Journal of agronomy
Paginering:
Jaargang 5 (2006) nr. 2 pagina's 175-181
Jaar:
2006
Inhoud:
Growth and ionic concentrations of alfalfa (<I>Medicago sativa</I> L.) seedlings in response to interactive effects of different concentrations of Na<SUP>+</SUP>(10, 50, 100 and 200 mol m<sup>-3</SUP>) and Ca<SUP>2+</SUP> (0, 5 and 10 mM) in growth media were studied. Dry weights of roots, stems and leaves were substantially declined with NaCl concentration increase, however, Ca<SUP>2+</SUP> supplementation to the growth media alleviated the deteriorative effects of NaCl. Na<SUP>+</SUP> and Cl- were significantly increased with increasing NaCl concentrations in all plant organs, but addition of Ca<SUP>2+</SUP> had markedly reduced Na<SUP>+</SUP> and Cl- content, particularly in roots. K<SUP>+</SUP> was significantly reduced with increasing salinity level in roots and no clear trend was noticed in shoots. Ca<SUP>2+</SUP> supplementation significantly increased K<SUP>+</SUP> contents, particularly in roots. Ca<SUP>2+</SUP> content was unchanged or slightly increased with increasing NaCl. However, K/Na and Ca/Na ratios were significantly decreased with increasing NaCl, but addition of Ca<SUP>2+</SUP> had clearly altered the ratios to a positive increasing trend.
Uitgever:
Asian Network for Scientific Information, Pakistan
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