水分胁迫对三峡库区消落带桑树幼苗生理特性的影响  

Effects of Water Stress on Physiological Characteristics of Mulberry(Morus alba) seedlings in the Hydro-Fluctuation Belt of the Three Gorges Reservoir Area

作　　者：黄小辉[1,2] 刘芸[1] 李佳杏[1] 熊兴政[1] 尹小华[1] 陈阳[1] 秦俭[3] 黄先智[3] 杜英武 

机构地区：[1]西南大学资源环境学院林学系,重庆400716 [2]重庆市林业科学研究院三峡库区森林生态保护与恢复重庆市市级重点实验室,重庆400036 [3]西南大学蚕学与系统生物学研究所,重庆400716 [4]重庆市蚕业管理总站,重庆400020

出　　处：《林业科学》2012年第12期122-127,共6页Scientia Silvae Sinicae

基　　金：国家蚕桑产业技术体系项目(ARS-22-ZJ0503);西南大学资源环境学院本科生科技创新"光炯"培育项目(20110104);三峡库区森林生态保护与恢复重庆市市政实验室项目(CSTC;2007CA1001);重庆市科技攻关计划项目(CSTC;2011AB1028);世界自然基金会(瑞士)项目(10000757-1.3.01.02)

摘　　要：对消落带和河岸带受损生态系统进行植物生态修复是非常有效的治理途径之一（马利民等,2009;戴方喜等,2006;滕衍行等,2005;Lowrance etal.,2000;Naima,2000;Dennis,1999）,而植被恢复首先要解决的问题是适生植物的筛选（马菲等,2010）。按照国内外现有研究方法消落带植被修复树种在三峡库区消落带的治理实践屡屡失败,许多耐干旱的植物不耐水淹,Guisang 12,a variety of mulberry（Morus alba）,was used to study the effects of different levels of water hardening on physiological characteristics of the mulberry seedlings in the hydro-fluctuation belt of the Three Gorges Reservoir Area.The seedlings were subjected to different water regimes for 30 days.The results showed that：the chlorophyll content of mulberry seedlings was increased by 10.4% under the drought hardening（DH） condition than that of CK,while decreased by 3.2% under the waterlogging hardening（WH） condition than that of CK.With the soil moisture content reducing,the stomatal conductance（Gs） and transpiration rate（Tr） of mulberry seedlings both declined remarkably;The photosynthetic rate（Pn） of mulberry seedlings under the drought hardening and waterlogging hardening conditions was all higher than that of CK,and the intercellular CO2 concentration（Ci） under the two conditions was lower than that of CK;The instantaneous water use efficiency of mulberry seedlings under the drought hardening and waterlogging hardening conditions was remarkably increased by 57% and 27% than that of CK,respectively,and the abscisic acid（ABA） content in the two conditions were remarkably increased by 79% and 29% than that of CK,respectively.

关 键 词：桑树 苗期锻炼 三峡库区消落带 生理特性 

分 类 号：S718.43[农业科学—林学]