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Thelco Precision Incubator

Company: Precision
Catalog#: 51221120
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Assessing Plant Tolerance to Acute Heat Stress
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2017-07-20
[Abstract]  It is well-established that plants are able to acclimate to temperatures above or below the optimal temperature for their growth. Here, we provide protocols for assays that can be used quantitatively or qualitatively to assess the relative ability of plants to acquire tolerance to high temperature stress. The hypocotyl elongation assay described was developed to screen for mutants defective in the acquisition of tolerance to extreme temperature stress, and other assays were developed to further characterize mutant and transgenic plants for heat tolerance of other processes or at other growth stages. Although the protocols provide details for application to Arabidopsis thaliana, the same basic methods can be adopted to assay heat tolerance in other plant species. [摘要]  植物能够适应温度高于或低于最佳温度以达到其生长的目的是确定的。 在这里,我们提供可用于定量或定性评估植物获得耐高温胁迫耐受性的相对能力的测定方案。 开发了描述的下胚轴延伸测定以筛选获得对极端温度胁迫的耐受性的缺陷突变体,并且开发了其他测定以进一步表征突变体和转基因植物用于其它过程的耐热性或在其它生长阶段。 虽然方案提供了应用于拟南芥的细节,但是可以采用相同的基本方法来测定其他植物物种的耐热性。
【背景】植物能够适应温度高于或低于其最佳温度以达到其生长的目的已经确定,许多研究已经确定了与温度适应有关的基因。通常,适应需要暴露于非破坏性温度处理的时期,要么超过最佳以诱导耐热性,要么低于最佳诱导感冒或冷冻耐受性。在拟南芥和其他植物中,冷冻耐受性可以在冷处理(冷硬化)的24小时期内实现,在几天硬化后发生最大的冷冻耐受性(Gilmour等人,1988; Thomashow,1999)。在几个小时内,对正常致命或破坏性高温的耐受性可以更快地发展。这种类型的快速驯化被Yarwood(1967)和其他人在20世纪60年代使用各种植物物种进行了广泛的记录。高温适应性研究在20世纪80年代早期得到认可时加速,包括植物在内的所有生物体都受到热应激的反应,“热休克反应”涉及转录和翻译一组保守的“热休克蛋白”(Lindquist, 1986; ...

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