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首页> 外文期刊>Journal of Plant Nutrition >Assessment of different wheat genotypes with altered genetic background in response to different salinity levels
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Assessment of different wheat genotypes with altered genetic background in response to different salinity levels

机译：响应于不同盐度水平的改变遗传背景不同小麦基因型评估

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This experiment was conducted in a glasshouse at the Agricultural and Natural Resources Research Center of Zarghan, Iran, in 2016. Sixteen wheat genotypes were compared under four salinity levels [control, 50, 100, and 150mM sodium chloride (NaCl)] in terms of grain yield, chlorophyll (SPAD), flag leaf area, Na+/K+ ratio, catalase, and peroxidase activities in a randomized complete block design with three replications. Overall, results indicated that apparently no single parameter or a specific group of parameters could be suggested as factors of the most responsive element to different salinity stress levels. In other words, the tolerance mechanism of wheat genotypes is a complex response of multiple factors as a network path. Furthermore, different salinity levels led to different responses of wheat genotypes, which were detectable by the results of the mean comparison and analysis of variance. These results also proved the influential effects of the genetic background on salinity response and tolerance of wheat genotypes. In addition, antioxidants acting as defense barriers against reactive oxygen species are very important constituents against salinity, since higher antioxidant activity leads to alleviate the oxidative stress caused by salinity. Higher osmolyte concentration regulating the selective uptake of useful ions can prevent excess accumulation of toxic ions, which contribute to salinity stress damages. A high variation related to the measured traits in this study under both normal and salinity stress conditions was achieved, which could be applied in screening and breeding programs for salinity stress tolerance. Moreover, the responses of different genotypes varied regarding the different traits; SU-0129 as a novel genotype has proved to be the best choice for further breeding research based on the overall traits and, in particular, grain yield and tolerance stress index.
机译：在2016年，在伊朗Zarghan农业和自然资源研究中心进行了该实验，在2016年进行。在四个盐度水平[对照，50,100和150mM氯化钠（NaCl）下，将十六个小麦基因型进行比较谷物产量，叶绿素（Spad），旗叶面积，Na + / k +比，过氧化氢酶和过氧化物酶活性，具有三种复制。总体而言，结果表明，显然没有单个参数或特定的参数组可以被建议为最敏感元素的因素，以不同的盐度应力水平。换句话说，小麦基因型的耐受机制是多个因素作为网络路径的复杂响应。此外，不同的盐度水平导致小麦基因型的不同响应，其通过平均比较和方差分析的结果可检测。这些结果还证明了遗传背景对盐度响应的影响力和小麦基因型的耐受性。此外，作为反应性氧物质的防御屏障的抗氧化剂是含盐的非常重要的成分，因为较高的抗氧化活性导致缓解盐度引起的氧化应激。更高的渗透浓度调节有用离子的选择性摄取可以防止毒性离子的过度积聚，这有助于盐度应力损坏。实现了与该研究的测量性状相关的高变异，在正常和盐度应力条件下，可用于筛选和育种计划以进行盐度应力耐受性。此外，不同基因型的反应在不同的特征方面变化; SU-0129作为一种新的基因型，已被证明是基于整体特征的进一步育种研究的最佳选择，特别是谷物产量和耐受应力指数。

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