水分胁迫对夏枯草营养期生长和生理特性的影响

Effect of water stress on physiological and growth charaters of Prunella vulgaris at the vegetative stage

目的：以夏枯草植株为材料,研究不同水分处理（95%~100%,80%~85%,65%~70%,50%~55%,35%~40%）对其营养期生长与生理的影响。方法：采用每天定时定量称重法处理夏枯草植株,测定相关指标,结合统计方法进行分析比较。结果：随水分胁迫处理时间的延长,植株以SY2,SY3增长最快,生长最好,保护酶与调节物质呈现出先上升后下降趋势 相同处理时间下,随水分胁迫梯度不同,保护酶与渗透调节物质基本呈先上升后下降趋势,并以SY2,SY3含量最低。结论：夏枯草保护酶与渗透调节物质是一个整体,共同对植株作用 营养期夏枯草生长所需水分以65%~80%为佳。超过此范围不利于夏枯草生长。

Objective： To study the effect of water stress on physiological and the growth characters of Prunella vulgaris at the vegetative stage. Method： The plants were treated timely and quantitatively by weighting method, and the relevant index were meas- ured under different water stress conditions. Result ： With the long time of water stress, the plants of SY2 and SY3 showed the quickest growth rate and the best of growth vigor. The protective enzyme and osmoregulation substance presented the trend of increase firstly and then decrease. Under the same time of water stress, with the increase of extent in treatment, the protective enzyme and osmoregulation substance presented the trend of increase firstly and then decrease, and SY2 and SY3 were the lowest. Conclusion： The protective en- zyme and osmoregulation substance of P. vulgaris have a whole effect. The suitable water range of growth in P. vulgaris is 65% -80%.