豌豆幼苗在盐胁迫下的生理生态响应

采用不同浓度的盐(NaCl)溶液对豌豆(Pisium sativum)幼苗进行处理,通过测定其形态指标和生理生化指标,研究苗期豌豆在盐胁迫下的生理生态响应。结果表明,株高和根长变化与盐处理浓度显著相关,随着盐浓度的增加,株高和根长均增长缓慢,植株和根部含水率显著下降;不同处理下叶片中叶绿素的含量随盐处理时间的延长明显下降;脯氨酸含量与盐处理浓度呈现显著正相关,而与处理时间没有显著相关性;可溶性糖含量随着盐浓度的增加而增加,除对照外所有处理均在10 d时达到峰值而后开始下降;超氧化物岐化酶(SOD)酶活性随着盐处理浓度和处理时间的增加而增加,各浓度处理在10 d达到峰值后呈下降趋势;过氧化物歧化酶(POD)酶活性随着盐处理浓度的增加而增加,随处理时间的延长,其含量呈稳定上升趋势。

Eco-physiological responses of pea seedlings to salt stress

The responses of pea seedlings to salt stress (NaCl solutions) were studied at the morphological, physiological and biochemical levels. The results showed that the changes of plant height and root length were significantly related to salt stress. As the salt concentration increased, the plant height and root length slowly declined, and the root moisture content decreased significantly. Chlorophyll content in leaf under different treatments significantly decreased with the treating time. Proline content positively correlated to salt concentration, but did not relate to the treating time. Soluble sugar content increased along with the salt concentration, it began to decline after the peak on 10th day. SOD content increased along with the salt concentration and treating time as well, it reached the maximum on 10th day. POD activity increased with the salt concentration and treating time and its content increased steadily.