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多胺调节拟南芥幼苗耐盐性的初步研究

DOI: 10.7685/j.issn.1000-2030.2008.03.011, PP. 55-59

Keywords: 拟南芥,盐胁迫,多胺

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Abstract:

比较了4种外源多胺(腐胺、尸胺、精胺、亚精胺)缓解拟南芥盐害的作用,结果发现0.01mmol.L-1精胺的缓解效果最好。对不同浓度NaCl处理下内源多胺含量进行测定,发现随着盐浓度的增加,游离态亚精胺含量显著下降,而精胺含量逐渐升高。0.01mmol.L-1的外源精胺处理可以降低100mmol.L-1NaCl处理下植株体内的Na+/K+。上述结果表明,精胺对拟南芥幼苗盐胁迫下离子平衡的调节作用可能是其缓解盐害的一个重要机制。

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