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期 刊 ：植物保护学报 2012年

关键词：黄瓜；AM真菌；根结线虫；生长；生理特征；

Keywords:cucumber, AM fungi, root-knot nematode, growth, physiological characteristics,

摘 要 ：通过盆栽试验研究了丛枝菌根真菌Arbuscular mycorrhiza(AM)和南方根结线虫Meloidogyne incognita互作对黄瓜幼苗生长及生理特征的影响。结果表明,预先接种地表球囊霉Glomus versiforme再接种线虫处理的鲜、干重较只接种线虫的处理显著增加;预先接种AM真菌再接种线虫处理的根结线虫病情指数、AM真菌侵染率较只接种线虫的处理明显降低;接种线虫使黄瓜植株的过氧化物酶(POD)、过氧化氢酶(CAT)及苯丙氨酸解氨酶(PAL)、总酚含量有不同程度提高,其中预先接种根内球囊霉G.intraradices对黄瓜植株起到了较好的保护作用;与对照相比,只接种线虫处理的叶片磷含量降低了25.26%,预先接种AM真菌再接种线虫处理的叶片磷含量较只接种根结线虫的含量高。

Abstract:A pot experiment was conducted to study the effects of interaction between fungus Arbuscular mycorrhiza (AM) and root-knot nematode Meloidogyne incognita on the growth and physiological characteristics of cucumber. It showed that the fresh and dry weight increased significantly in the treatment of pre-inoculating AM fungi and then inoculating root-knot nematode compared with the treatment of inoculating root-knot nematode only. The disease index of root-knot nematode and the infection rate of AM fungi decreased obviously in the treatment of pre-inoculating Glomus versiforme and then inoculating root-knot nematode compared with that of inoculating root-knot nematode only. The content of peroxidase (POD), catalase (CAT), phenylalanine ammonia-lyase (PAL) and total phenol enhanced in different degrees in the treatment of inoculating root-knot nematodes only, and the cucumber seedlings were protected by pre-inoculating G.intraradices. The phosphorus content of leaves decreased by 25.26% in the treatment of inoculating root-knot nematode only compared with CK, and the phosphorus contents of leaves increased in the treatments of pre-inoculating AM fungi and then root-knot nematode compared with inoculating root- knot nematode only.

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