Tahseen Q, Clark I M, Atkins S D, Hirsch P R, Kerry B R
Nematode Interactions Unit, Rothamsted Research Harpenden, England, UK.
Commun Agric Appl Biol Sci. 2005;70(1):81-6.
The microbial and nematode populations associated with two plants (tomato and cabbage) inoculated with the nematophagous fungus, Pochonia chlamydosporia var. chlamydosporia or root knot nematode (Meloidogyne incognita), or both, were compared with those in unplanted controls. The dominant factor affecting culturable microbial populations was found to be the presence or absence of tomato plants. Generally microbial colony counts were lowest in unplanted soil, small increases were associated with cabbage and significantly greater numbers with tomato plants. Differences in microbial diversity (estimated from community profiles of carbon substrate utlisation, using Biolog) were observed between planted and unplanted soils, however, there were few differences between soils with either of the two plants. The presence of P. chlamydosporia was associated with a reduction in the numbers of plant parasitic nematodes (51%-78%) including the migratory ectoparasites, whereas free-living nematodes, culturable bacteria and bacterial populations assessed by Biolog were unaffected by the application of fungus.
将与接种了捕食线虫真菌（厚垣普可尼亚菌厚垣孢变种）或根结线虫（南方根结线虫）或两者的两种植物（番茄和卷心菜）相关的微生物和线虫种群，与未种植的对照中的微生物和线虫种群进行了比较。发现影响可培养微生物种群的主要因素是番茄植株的有无。一般来说，未种植土壤中的微生物菌落数最低，与卷心菜相关的微生物菌落数有小幅增加，而与番茄植株相关的微生物菌落数显著更多。在种植土壤和未种植土壤之间观察到了微生物多样性的差异（使用Biolog通过碳底物利用的群落概况估计），然而，两种植物各自所在土壤之间几乎没有差异。厚垣普可尼亚菌的存在与植物寄生线虫数量的减少有关（减少51%-78%），包括迁移性外寄生线虫，而自由生活线虫、可培养细菌以及通过Biolog评估的细菌种群不受真菌施用的影响。
