干旱胁迫下小麦部分转录因子表达模式及纳米锌的研究

Seyede Yalda Raeesi Sadati, Sodabeh Jahanbakhsh Godehkahriz, A. Ebadi, M. Sedghi
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引用次数: 1

摘要

在干旱胁迫条件下,信号系统诱导某些基因的表达来抵消环境胁迫的有害影响。锌是植物生长发育所必需的微量元素之一,在植物的基因表达和胁迫耐受等多种代谢过程中起着重要作用。为了研究干旱胁迫和氧化锌对小麦非生物胁迫相关基因WRKY1、HMA2和ZIP1相对表达模式的影响,采用3个重复的完全随机设计,在盆栽条件下进行了因子试验。在本试验中,第一个因素是3个水平的干旱胁迫(田间容量的35%、60%和85%),第二个因素是3个小麦品种(黑稻、梅汉和赛森),第三个因素是3个水平的氧化锌(0、0.5和1 g/l)。结果表明,随着干旱胁迫水平的增加,抗旱品种(美寒)WRKY1和ZIP1基因的相对表达量增加,干旱敏感品种(赛森)ZIP1基因的表达量随胁迫时间的增加而增加。在轻度干旱胁迫下,Heidari品种的HMA2基因相对表达量最高。在干旱胁迫下,耐旱品种(梅汉)3个基因的表达均有所增加。提高HMA2和ZIP1基因的表达水平可能与锌向消耗组织的转移有关,也可能与增加植物当前代谢中锌的消耗有关,这对小麦耐干旱胁迫具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study of Expression Pattern of Some Transcription Factors in Wheat under Drought Stress and Zinc Nanoparticles
Under drought stress condition, the signaling system induces expression of certain genes to counteract the deleterious effects of environmental stress. Among the essential micronutrients for plant growth and development, zinc has an important role in many plant metabolic processes including gene expression and stress tolerance. In order to investigate the effect of drought stress and ZnO on relative expression pattern of some genes involved in abiotic stresses (including WRKY1, HMA2 and ZIP1 genes) in wheat cultivars, a factorial experimental was conducted in pot condition based on a completely randomized design with three replications. In this experiment, the first factor was three levels of drought stress (35, 60 and 85% of field capacity), the second factor was three wheat cultivars (including Heidari, Meihan and Sysons), and the third factor was three levels of ZnO (0, 0.5 and 1 g/l). According to the results, with increasing the level of drought stress, the relative expression of WRKY1 and ZIP1 genes in drought tolerant cultivar (Meihan), and also with increasing nanoparticle concentration over stress time, the expression of ZIP1 gene in drought sensitive cultivar (Sysons) increased. The highest relative expression of HMA2 gene was observed in Heidari cultivar under mild drought stress. Generally, the expression of all three genes studied in tolerant cultivar (Meihan) increased under drought stress. Increasing the expression level of HMA2 and ZIP1 genes could be related to the transfer of zinc to consuming tissues and also, to increase the consumption of zinc in current metabolism of plant, which is important in tolerance of wheat to drought stress.
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