上海崇明东滩加拿大一枝黄花根际部分可培养细菌的多样性分析

The analysis of the diversity of the partial rhizosphere bacteria of Solidago canadensis L.on Chongming Island,Shanghai

加拿大一枝黄花(Solidago canadensis L.)是一种外来引进后逃逸造成危害的新入侵杂草,以上海市崇明东滩不同时期围垦地为研究地点,采用微生物培养技术,对生长于上海崇明东滩不同时期围垦地的加拿大一枝黄花根际微生物进行分离筛选和菌种鉴定,结果表明:加拿大一枝黄花根际可培养微生物种类随入侵时间的延长而增多,根际微生物多样性随入侵时间的延长而增加;根际可培养微生物种类随季节的变化有所不同,夏季的根际微生物种类总体比冬季多,另外具有解磷和分解尿素的微生物较多,推测这些细菌的存在与加拿大一枝黄花可以在入侵地成功繁殖并且速度惊人有一定关系.

Invasive plant have caused serious harm to crop production, orchards, lawns, natural environments and biodiversity in China. Solidago Canadensis L. is a perennial plant originating from North America. This study examined the associations between Solidago Canadensis L. and its rhizosphere microorganisms in relation to the invasion history ofSolidago Canadensis L. on Chongming Island, Shanghai . Further analysis indicated that the root exudates ofSolidago Canadensis L promoted the number of n/trite bacteria, aerobic azotobacter, sulphate reducer, ammonifier and aerobic cellulose-decomposer.