NaCl胁迫对文冠果幼苗生长性状的影响

摘要

采用盆栽方法,以1年生文冠果幼苗为试材,用不同质量分数(0.0%、0.1 %、0.2%、0.4%、0.6%、0.8%)的NaCl溶液进行浇灌处理,对盐胁迫下文冠果幼苗生长性状进行了研究,结果表明:(1)盐胁迫抑制了文冠果的生长,随着盐胁迫浓度的升高,文冠果幼苗的苗高生长量、地径生长量、地上生物量和地下生物量均呈下降趋势,且在盐胁迫质量分数较高时(0.4%、0.6%、0.8%)下降趋势明显,与对照相比差异均显著(p<0.05);(2)文冠果的根冠比在盐胁迫下呈增加趋势,特别是在高质量分数盐胁迫下文冠果的根冠比增加明显(p<0.05),盐胁迫下增加生物量在根部的分配是植物应对盐胁迫的方式之一.%The growth properties were investigated from seedlings of Xanthoceras sorbifolia.The seedlings were cultivated in pots that were treated with sodium chloride (NaCl) solutions with concentrations of 0.0%, 0.1 %, 0.2%, 0.4%, 0.6% and 0.8%. The results indicated:(1)The growth of Xanthoceras sorbifolia was inhibited under NaCl stress,the height growth,diameter growth,aboveground biomass and underground biomass decreased with the increase of NaCl concentration, and the decrease trend was obvious when the concentration of salt stress was higher (0.4%, 0.6%, 0.8%), Compared with the control group were significantly different; (2) The ratio of root to shoot for Xanthoceras sorbifolia increased under both concentration of NaCl,especially under high concentration of NaCl,the ratio of root to shoot increased significantly, which was considered as a biomass allocation strategy for a certain class of plants under salt stress.