周小梅;赵运林;董萌;库文珍;梁曾恩妮;

• 1:湖南城市学院建筑与城市规划学院
• 2:中南林业科技大学
• 3:湖南城市学院化学与环境工程学院
• 4:湖南省农产品加工研究所

摘要(Abstract)：

为探讨功能微生物对镉(Cd)胁迫下蒌蒿耐受性的影响,以成团泛菌(Pantoea agglomerans)J2为对象,通过盆栽试验,研究不同Cd处理水平下J2菌对蒌蒿生长、生理、Cd富集转运与根际微生态的影响。结果表明:J2菌可显著促进蒌蒿株高、地上部干重、地下部干重、总生物量及根冠比的增加。在J2菌的作用下,蒌蒿叶绿素a、叶绿素b和总叶绿素含量以及超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性均显著增加,丙二醛(MDA)含量明显减少。J2菌可显著促进蒌蒿对Cd的富集转运,蒌蒿地上部、地下部与总Cd含量均显著增加,地上部生物富集系数(BCF)明显大于地下部,转运系数(TF)相比于对照增加了7.5%~37.4%。J2菌可显著增加蒌蒿根际土壤细菌、放线菌数量及微生物总量,明显减少真菌数量。研究表明成团泛菌J2对蒌蒿生长、生理、Cd富集转运与根际微生态可产生积极影响,在一定程度上可提高蒌蒿植株对Cd的耐受性。

关键词(KeyWords)： 成团泛菌;镉胁迫;蒌蒿;耐受性

Abstract:

Keywords:

基金项目(Foundation): 湖南省自然科学基金(2015JJ4012,2016JJ4015);; 湖南省教育厅优秀青年项目(15B045)

作者(Author): 周小梅;赵运林;董萌;库文珍;梁曾恩妮;

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