钼污染对丛枝菌根和球囊霉素的影响

丛枝菌根作为地球上最广泛的共生体,在各种逆境环境中发挥着重要作用.基于不同钼污染程度的钼矿区,分析了钼污染对丛枝菌根真菌侵染、繁殖及其分泌球囊霉素能力的影响.结果 表明,在4个不同钼污染级别的土壤中,丛枝菌根真菌与植物共生关系的形成未受到钼污染的影响,平均菌根侵染频度为50.64％.洛阳钼矿区土壤的平均孢子密度为19....

Effects of molybdenum pollution on arbuscular mycorrhizal fungi and GRSP

Arbuscular mycorrhizal fungi,as the most widespread symbionts in earth,play an important role in all kinds of adversity environment.This study analyzed the effects of molybdenum pollution on the infection,reproduction and the ability of glomalin secretion by arbuscular mycorrhizal fungi in the molybdenum mining areas with different levels of molybdenum pollution.The results showed that,the formation of the symbiotic relationship between arbuscular mycorrhizal fungi and plants was not affected by molybdenum pollution under 4 different levels.The average mycorrhizal infection frequency was 50.64%.The average spore density of soil in Luoyang molybdenum mining area was 19.20 spores·g^-1airdried soil,among which the average spore density of herb and woody plant rhizosphere soil was 18.2 and 20.3 spores·g^-1airdried soil,respectively.Under severe level of molybdenum pollution,the content of total and easily extractable glomalin in soil were significantly lower than those of nonmolybdenum contaminated soil,with the value of 1.53 and 0.72mg·g^-1,respectively.There was a significantly negative correlation between molybdenum content and spore density or glomalin,but there was no significant correlation with mycorrhizal infection rate according to the results of correlation analysis.At the same time,there was no significant correlation between the glomalin and the mycorrhizal infection rate under the other three molybdenum pollution levels except for the light molybdenum pollution level.It can be seen that although molybdenum pollution does not affect the infection of arbuscular mycorrhizal fungi on plants,it has a certain inhibitory effect on the ability of arbuscular mycorrhizal fungi to multiply and secrete glomalin.