期刊论文

Effects of Pseudomonas fluorescens on Physiological Characteristics and Rhizosphere Micro-ecology of Artemisia selengensis

中文

环境科学与技术

1003-6504

2016

39

8

58-63,122

10.3969/j.issn.1003-6504.2016.08.011

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

本校为第一机构

为探讨功能微生物对镉(Cd)富集植物蒌蒿的影响机制。以荧光假单胞菌(Pseudomonas fluorescens)Y5为对象,通过盆栽试验,研究其对蒌蒿抗性生理和根际微生态的影响。结果表明,在Cd胁迫下荧光假单胞菌Y5能显著增加蒌蒿植株叶绿素a、叶绿素b和总叶绿素含量;能明显增加蒌蒿植株体内超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性,显著减少丙二醛(MDA)含量;在Cd胁迫下对蒌蒿植株根际土壤细菌、放线菌数量及微生物总数表现为促进作用,对真菌则表现为抑制效应;在Cd胁迫下可显著增加蒌蒿植株根际土壤脲酶、蔗糖酶和磷酸酶活性,但对脱氢酶和过氧化氢酶活性无显著影响,说明荧光假单胞菌Y5对蒌蒿...

To explore influencing mechanism of functional microorganism on Artemisia selengensis under cadmium stress, with Pseudomonas fluorescens Y5 as research object,the effects of strain Y5 on resistant physiology and rhizosphere microecology of Artemisia selengensis were studied by pot experiment. The results indicated that Pseudomonas fluorescens Y5 could distinctly increase the contents of chlorophyll a,chlorophyll b and the total chlorophyll of Artemisia selengensis;it could significantly enhance the activities of superoxide dismutase (SOD),peroxidase (POD) and catalase (CAT),and significantly r...