外源亚精胺对NaCl胁迫下黄瓜幼苗<br /> 多胺代谢的影响<br />
Journal Title: Science Paper Online - Year 2007, Vol 2, Issue 2
Abstract
本文采用营养液水培，研究外源亚精胺（Spd）对NaCl胁迫下抗盐能力不同的两个黄瓜品种幼苗体内多胺（PAs）含量及PAs代谢关键酶活性的影响。结果表明，50 mmolL-1 NaCl溶液胁迫下黄瓜幼苗叶片和根系中精氨酸脱羧酶（ADC）、鸟氨酸脱羧酶（ODC）、s-腺苷蛋氨酸脱羧酶（SAMDC）和多胺氧化酶（PAO）活性显著升高，引起腐胺（Put）、亚精胺（Spd）和精胺（Spm）含量显著增加，且存在品种差异，抗盐性较强的‘长春密刺’Spd、Spm含量和ADC、ODC、SAMDC活性升高幅度均大于抗盐性较弱的‘津春2号’，而Put 含量和PAO活性升高幅度却小于‘津春2号’。外源0.1 mmolL-1 Spd溶液处理促进ADC、ODC和SAMDC活性迅速升高，显著提高了幼苗Spd和Spm 含量，降低了Put含量和PAO活性，且对‘津春2号’影响更明显。表明NaCl溶液胁迫下外源Spd参与了黄瓜幼苗体内内源PAs代谢的调节过程，对增强幼苗抗盐性起着重要的作用。
Authors and Affiliations
Jiuju Duan, Shirong Guo, Jing Li, Yunyan Kang
Keywords
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