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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Characterization of seed germination, seedling growth, and associated metabolic responses of Brassica juncea L. cultivars to elevated nickel concentrations
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Characterization of seed germination, seedling growth, and associated metabolic responses of Brassica juncea L. cultivars to elevated nickel concentrations

机译：甘蓝型油菜种子对镍浓度升高的种子萌发，幼苗生长及相关代谢反应的表征

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摘要

Seed germination and seedling growth responses of three Brassica juncea L. cultivars, namely Varuna, Kranti, and Pusa Jai Kisan, to nickel have been characterized. Ni suppressed the seed germination differentially, suppression being greater in cv. Kranti than in others. On the basis of seedling growth performance, cv. Varuna proved most tolerant to Ni. The Ni accumulation in seedlings differed strongly among the three cultivars. The lowest and highest Ni contents were observed in the seedlings of cvs. Kranti and Pusa Jai Kisan, respectively. Despite substantial Ni accumulation, cv. Varuna was most tolerant to Ni. Ni accumulation in seedlings was accompanied by differentially altered Fe and K contents and increased levels of non-protein thiols and free proline. The O-2(-) and H2O2 contents and their respective scavenging enzymes in the seedlings responded differentially to the Ni treatment suggesting the involvement of redox imbalance in the development of Ni toxicity. Interestingly, the greater Ni tolerance of cv. Varuna coincided with the elevated constitutive activities of superoxide dismutase (SOD) and ascorbate peroxidase (APX). The data have implications for seedling establishment under Ni-rich conditions and in turn for phytoremediation.
机译：表征了三个芥菜品种Varuna，Kranti和Pusa Jai Kisan对镍的种子发芽和幼苗生长反应。 Ni对种子发芽的抑制作用不同，cv抑制作用更大。克兰蒂比其他人。根据幼苗生长性能，简历。 Varuna被证明对Ni最有耐性。在三个品种中，幼苗中镍的积累差异很大。在cvs的幼苗中观察到最低和最高的Ni含量。分别是Kranti和Pusa Jai Kisan。尽管镍大量积累，但cv。瓦鲁纳（Varuna）对镍最为宽容。镍在幼苗中的积累伴随着Fe和K含量的差异性变化以及非蛋白硫醇和游离脯氨酸水平的增加。幼苗的O-2（-）和H2O2含量以及它们各自的清除酶对Ni处理的反应不同，表明氧化还原失衡参与了Ni毒性的发展。有趣的是，cv对Ni的耐受性更大。 Varuna与超氧化物歧化酶（SOD）和抗坏血酸过氧化物酶（APX）的本构活性升高同时发生。这些数据对富镍条件下的幼苗建立以及植物修复具有重要意义。

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