Response of Invasive Plant Alligatorweed to Salt Stress at Early Growth Stage  

入侵植物空心莲子草早期生长对盐胁迫的响应(英文)

作　　者：刘大胜[1] 娄美芳[2] 范海[2] 范舒月[2] 尹济滨[1] 杨淑英[1] 孔立志[1] 

机构地区：[1]山东省环境保护科学研究设计院,山东济南250013 [2]山东师范大学生命科学学院,山东济南250014

出　　处：《Agricultural Science & Technology》2013年第9期1325-1327,1346,共4页农业科学与技术（英文版）

基　　金：Supported by Shandong Science and Technology Program(2009GG10008014);Shandong Environmental Protection Research and Development Project(2011Xiaoqinghe)~~

摘　　要：[Objective] The study aimed to investigate the early growth stage＇s response of invasive plant alligatorweed（Alternanthera philoxeroides） under salt stress.[Method] The alligatorweed was cultivated with four different NaCl concentrations 0（control）, 100, 200, 300 mmol/L diluted in 1/2 Hoagland＇s solution at early stage.During the period, we measured the number of nodes and leaves, length, fresh weight, dry weight and water content of stems to determine the effect of salt on alligatorweed growth. [Result] Compared with control, the node number, leaf number,length, fresh weight and dry weight of the stems significantly changed in NaCl solution, and the difference was positively related to NaCl concentration. We concluded that middle and high concentrations of NaCl significantly inhibited the growth of alligatorweed, by suppressing the node number, leaf number, length, fresh weight and dry weight of the stems. Among them, the stem length and fresh weight were more sensitive to NaCl stress. [Conclusion] The present result is helpful to understand the alligatorweed＇s adaptability to saline environment, and also helpful to prevent its invasion in such environment.[目的]研究入侵植物空心莲子草早期生长对盐胁迫的响应。[方法]用分别含有浓度为0(对照)、100、200、300 mmol/L NaCl的1/2浓度Hoagland营养液处理早期生长阶段的空心莲子草,研究NaCl处理对空心莲子草的茎节数目、叶片数目、茎长、鲜重和干重和含水量的影响。[结果]NaCl处理对空心莲子草的茎节数目、叶片数目、茎长、鲜重和干重均产生影响,随着处理浓度的升高影响逐渐显著。中高浓度的NaCl处理能显著抑制空心莲子草的生长,主要表现为抑制空心莲子草的茎节数目、茎长、鲜重和干重的增长,减少空心莲子草的叶片数目,其中茎长和鲜重是2个较易受影响的指标。[结论]开展空心莲子草的抗盐研究对了解其对盐碱地环境的适应性,防止其在盐碱地环境的入侵具有重要意义。

关 键 词：Alligator weed Early growth Salt stress RESPONSE 

分 类 号：S451[农业科学—植物保护]