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Variability of durum wheat genotypes in terms of physio-biochemical traits against salinity stress
Cereal Research Communications ( IF 1.6 ) Pub Date : 2020-10-07 , DOI: 10.1007/s42976-020-00087-0
Shobha Soni , Ashwani Kumar , Nirmala Sehrawat , Naresh Kumar , Gurpreet Kaur , Arvind Kumar , Anita Mann

An experiment was planned to explore variability of durum wheat toward salinity stress in randomised block design with two tolerant and one sensitive check under three different environments, i.e., control, ECiw—6 dS m−1 and ECiw—10 dS m−1 in three replications. Different physico-biochemical traits were measured in roots as well as shoots at the reproductive stage. Both roots and shoots showed MI of 8.5% on mean basis under normal condition which increased to 32.78% in roots and 31.44% in shoots at the extreme level of salinity ECiw—10 dS m−1. Significant increase was noted in proline content in roots as well as in shoots under stress environment and found approximately 2.5 times higher mean proline accumulation in roots and in shoots. TSS content increased in roots while reverse trend was noted for shoots. Shoots had higher accumulation of soluble proteins in comparison with roots, but the shoot soluble protein decreased with salinity while roots showed the reverse trend, i.e., content increased under salinity stress. KRL 99, KRL 3–4, MACS 3949 maintained their root as well as shoot Na+/K+ below 1 under the severe stress of ECiw—10 dS m−1. Results showed that genotypes exhibited a significant differential response and the antioxidative enzyme activity increased both in roots and shoots under mild and severe salinity. Overall, it was noted that individual genotypes displayed variability in terms of physico-biochemical traits toward salinity stress that confers their ability to survive under stress environment and could serve as a genetic source for salt tolerance breeding programmes.

中文翻译:

硬粒小麦基因型在盐胁迫下生理生化性状的变异性

计划进行一项实验,在随机区组设计中探索硬质小麦对盐胁迫的变异性,在三种不同环境下进行两项耐受和一项敏感检查,即对照、ECiw-6 dS m-1 和 ECiw-10 dS m-1 三种不同的环境。复制。在生殖阶段测量了根和芽的不同物理生化性状。在正常条件下,根和芽的 MI 平均为 8.5%,在极端盐度 ECiw—10 dS m-1 下增加到根的 32.78% 和芽的 31.44%。在胁迫环境下,根和芽中脯氨酸含量显着增加,发现根和芽中平均脯氨酸积累量高出约 2.5 倍。TSS 含量在根中增加,而在芽中观察到相反的趋势。与根相比,地上部可溶性蛋白质的积累量较高,但地上部可溶性蛋白质随盐度升高而降低,而根系则呈相反趋势,即在盐分胁迫下含量增加。KRL 99、KRL 3–4、MACS 3949 在 ECiw—10 dS m-1 的严重胁迫下,将其根和芽的 Na+/K+ 保持在 1 以下。结果表明,在轻度和重度盐度下,基因型表现出显着的差异反应,根和地上部的抗氧化酶活性均增加。总的来说,注意到个体基因型在盐胁迫的物理生化特征方面表现出变异性,这赋予它们在胁迫环境下生存的能力,并可作为耐盐育种计划的遗传来源。但地上部可溶性蛋白随盐度升高而降低,而根系则呈相反趋势,即在盐分胁迫下含量增加。KRL 99、KRL 3–4、MACS 3949 在 ECiw—10 dS m-1 的严重胁迫下,将其根部和​​枝条 Na+/K+ 保持在 1 以下。结果表明,在轻度和重度盐度下,基因型表现出显着的差异反应,根和地上部的抗氧化酶活性均增加。总的来说,注意到个体基因型在盐胁迫的物理生化特征方面表现出变异性,这赋予它们在胁迫环境下生存的能力,并可作为耐盐育种计划的遗传来源。但地上部可溶性蛋白随盐度升高而降低,而根系则呈相反趋势,即在盐分胁迫下含量增加。KRL 99、KRL 3–4、MACS 3949 在 ECiw—10 dS m-1 的严重胁迫下,将其根部和​​枝条 Na+/K+ 保持在 1 以下。结果表明,在轻度和重度盐度下,基因型表现出显着的差异反应,根和地上部的抗氧化酶活性均增加。总的来说,注意到个体基因型在盐胁迫的物理生化特征方面表现出变异性,这赋予它们在胁迫环境下生存的能力,并可作为耐盐育种计划的遗传来源。MACS 3949 在 ECiw-10 dS m-1 的严重胁迫下将其根部和​​枝条 Na+/K+ 保持在 1 以下。结果表明,在轻度和重度盐度下,基因型表现出显着的差异反应,根和地上部的抗氧化酶活性均增加。总的来说,注意到个体基因型在盐胁迫的物理生化特征方面表现出变异性,这赋予它们在胁迫环境下生存的能力,并可作为耐盐育种计划的遗传来源。MACS 3949 在 ECiw-10 dS m-1 的严重胁迫下将其根部和​​枝条 Na+/K+ 保持在 1 以下。结果表明,在轻度和重度盐度下,基因型表现出显着的差异反应,根和地上部的抗氧化酶活性均增加。总的来说,注意到个体基因型在盐胁迫的物理生化特征方面表现出变异性,这赋予它们在胁迫环境下生存的能力,并可作为耐盐育种计划的遗传来源。
更新日期:2020-10-07
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