The study of seed viability, amount of proline and chlorophyll of local genotypes of rice under salt stress

Subject Areas :

Shahin  Mardani nezhad ¹ (Scientific Board and Member of Young Researchers Club, Islamic Azad University, Mobarakeh Branch)
Mansoureh  Vazirpour ² (Research Expert in Biology)

Received: 2006-07-29 Accepted : 2007-11-15 Published : 2007-09-23

Keywords: Rice, Chlorophyll, Proline, Local genotypes, Salt stress,

Abstract :

Changes of seed germination percentage and proline and chlorophyll amounts of Nogoran and Sorkheh and their known cultivars including, Zayandehrud, Sazandegi, and purred lines of 67-47 and 67-97 in reaction to 0-10 dsm/m sodium chloride concentrations were investigated to compare salinity tolerance of local rice genotypes. Experiment was done in a randomized complete block design with three replications. Analysis of variance and comparison of means were also done with Duncan multiple range test at 1% probability level. Increasing of sodium chloride's concentration in environment decreased seed germination percentage, radicle and coleoptile dry weight and chlorophyll amount of local rice genotypes at 1% probability level. Results of comparison of seed germination percentage means showed better performance of 67-47, Nogoran, Sorkheh and 67-97 than other genotypes. However, dry weight of radicle and coleoptile and amount of chlorophyll were seen in higher rate in genotype 67-47. Amount of proline amino acid in all genotype was increased with increasing of sodium chloride concentration. The highest amount of root and leaf proline was belonged to Sorkheh. Cultivation of genotype 67-47 was recommended in attention to relative salinity of soil in studied region and planting of 67-97 was not recommended duo to sensitivity of it’s chloroplasts to high sodium chloride concentrations.

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