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Biochemical, physiological and molecular evaluation of rice cultivars differing in salt tolerance at the seedling stage

机译：苗期耐盐性不同水稻品种的生物化学，生理学和分子评价

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摘要

Changes in the antioxidant enzymes, lipid peroxidation, sodium and potassium, chlorophyll, H202 and proline content were monitored in the leaves of 42 rice varieties which were not yet well-documented for the salinity tolerance under different salinity levels. The tolerant varieties (FL478, Hassani, Shahpasand, Gharib and Nemat) showed signs of tolerance (lower Na+/K+ ratio, high proline accumulation, less membrane damage, lower H2O2 production, and higher superoxide dismutase and catalase activity)very well. The positive relationship between the level of salt tolerance and the amount of proline accumulation in the rice varieties support the important role of proline under the salt stress. The varieties were genotyped for 12 microsatellite markersthat were closely linked to SalTol QTL. The results of association analysis indicated that RM1287, RM8094, RM3412 and AP3206 markers had the high value of R2 for the regression models of the studied traits. It shows the important role ofSalTol in controlling physio-biochemical traits. The results can be used in the future marker assisted selection (MAS) directly, if the results are confirmed.
机译：在42种水稻品种的叶片中监测抗氧化酶，脂质过氧化，钠和钾，叶绿素，H202和脯氨酸含量的变化，其在不同盐度水平下尚未良好地记录盐度耐受性。耐腐蚀品种（FL478，Hassani，Shahpasand，Gharib和Nemat）显示出耐受性的迹象（降低Na + / K +比，高脯氨酸积累，较少的膜损伤，低H2O2生产和更高的超氧化物歧化酶和过氧化氢酶活性）。水稻品种耐盐水平与脯氨酸积累的阳性关系支持脯氨酸在盐胁迫下的重要作用。该品种是基因分型的12微卫星标记物与盐QTL紧密相连。关联分析结果表明，RM1287，RM8094，RM3412和AP3206标记的R2具有高值，用于研究的性状的回归模型。它显示了血管醇在控制物理生化特征方面的重要作用。如果结果确认，结果可以在未来的标记辅助选择（MAS）中使用。

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