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水稻(Oryza sativa L.)幼苗经盐、热激和冷三种不同胁迫预处理均提高了幼苗的抗寒性。与未预处理苗相比,在处理后、低温伤害后和常温下恢复2d的三个时期,不同胁迫预处理苗的可溶性和热不稳定蛋白含量变化趋势甚为相似,但热稳定蛋白含量变化则各有异同。SDS-PAGE图谱分析显示,不同胁迫预处理提高水稻幼苗抗寒性时,其可溶性蛋白、热稳定和热不稳定蛋白组成变化亦各有异同。除诱导出共有的新多肽外,还各自诱导出特有的新多肽。结果表明,植物对不同胁迫的交叉适应存在一定的共同机理,但亦可看出植物对同一种环境胁迫似乎不是以同一的机理去适应。
Seedlings of Oryza sativa L. were pretreated with salt, heat shock and cold for three different stresses to improve their cold tolerance. Compared with the non-pretreated seedlings, the soluble and heat-labile protein contents of seedlings under different stress pretreatment showed similar trend after treatment, after cold injury and 2 days of recovery at normal temperature, but the content of heat-stable protein Then there are similarities and differences. SDS-PAGE analysis showed that different stress pretreatments to improve the cold resistance of rice seedlings, the soluble protein, thermal stability and heat-labile protein composition also have similarities and differences. In addition to inducing common new polypeptides, each also induced unique new polypeptides. The results showed that there was some common mechanism of plant cross-adaptation to different stresses, but it could also be seen that plants did not adapt to the same environmental stress with the same mechanism.