干旱胁迫及复水条件下刺槐(Robinia pseudoacacia L)苗木水分运输过程中的补偿现象  

Compensation effect of water transportation process in black locust( Robinia pseudoacacia L) seedlings under the conditions of drought and rewatering

作　　者：王丁[1] 杨雪[1] 韩鸿鹏[1] 张丽琴[1] 薛建辉[2] 

机构地区：[1]河南教育学院生命科学系生态学重点学科组,郑州450046 [2]南京林业大学江苏省林业生态工程重点实验室,南京210037

出　　处：《干旱区资源与环境》2015年第2期61-66,共6页Journal of Arid Land Resources and Environment

基　　金：国家十一五科技支撑计划课题(2006BAD03A0303);河南省教育厅自然基金项目(2011B180017);河南省重点科技攻关项目(142102110123);河南教育学院青年课题(20100102)资助

摘　　要：以盆栽两年生刺槐苗木为材料,测定了干旱及复水处理条件下刺槐苗木水分运输过程参数。结果表明:1)干旱胁迫对刺槐苗木体内水分运输过程影响显著;2)复水24h后,刺槐苗木体内水分运输过程参数有不同程度恢复。恢复度与苗木生理活性水平和干旱胁迫程度直接相关;3)复水24h后,刺槐苗木水分运输过程存在明显补偿现象。故应加强在干旱胁迫条件下林木的补偿效应研究,这对于节水林业和生态环境的保护都具有重要意义。This study was designed to investigate the regulative ability of plants for water transportation process under drought and rewatering. The water transportation process of Robinia pseudoacacia L seedlings,as experimental material,was determined under drought and rewater. The result showed that： 1. Drought had a significant effect on water transportation process of R. pseudoacacia seedlings; 2. After rewatering for 24 hours,the water transportation process parameter of R. pseudoacacia seedlings was restored in the different degree. Restoration degree was directly correlated to the degree of drought stress and the level of physiological activity. 3. After rewatering for 24 hours,the water transportation process parameters of R. pseudoacacia seedlings have significant compensation effect. In conclusion,further investigation should focus on the compensation effect of the trees under drought stress condition. The significance not only lies in water-saving forestry but also in protecting the ecological environment.

关 键 词：干旱胁迫 水分运输 补偿效应 刺槐 

分 类 号：Q945[生物学—植物学]