不同丛枝菌根真菌对大豆耐酸、铝能力的影响  

Effect of different arbuscular mycorrhizal fungi species on plant tolerance to low pH and aluminum toxicity in soybean

作　　者：张爽[1] 廖红[1] 王秀荣[1] 

机构地区：[1]华南农业大学资源环境学院/根系生物学研究中心,广东广州510642

出　　处：《中国油料作物学报》2014年第5期616-622,共7页Chinese Journal of Oil Crop Sciences

基　　金：国家重大基础研究发展规划项目(2011CB100301)

摘　　要：通过砂培实验,探讨磷高效耐铝大豆基因型巴西10号在低pH、铝处理条件下,接种7种丛枝菌根真菌,其植株生物量、根系形态指标的变化,以及不同丛枝菌根真菌侵染结构丰度的变化。结果表明,低pH值和铝毒均是大豆生长的限制因子。低pH和铝处理条件下,与不接种的对照相比,接种7种丛枝菌根真菌均能显著增加大豆植株生物量、总根长及植株吸磷量,降低植株铝含量。其中,植株地上部干重增加2倍以上;总根长和吸磷量增加1.5倍以上,而植株铝含量降低了49.0%以上。菌根侵染结构的丰度发生变化。低pH显著增加了Glomus spurcum的丛枝丰度和外生菌丝丰度;铝处理显著增加了Gigaspora margarita和Acaulospora mellea的丛枝丰度,以及Scutellpora calospora的外生菌丝丰度;而低pH和铝处理均显著增加了Glomus etunicutum的外生菌丝丰度。暗示不同丛枝菌根真菌对酸、铝毒害的忍耐机制可能有所不同。A sand culture was carried out to study the changes in plant biomass,root morphology and the richness of arbuscular mycorrhizal infection structures in phosphorus( P)- efficient and aluminum( Al)- tolerant soybean genotype Baxi 10( BX10) under low pH and Al treatments when inoculated with 7 different arbuscular mycorrhizal fungi species. Results showed that low pH and Al toxicity inhibited soybean growth. Plant biomass increased more than 2 fold,and total root length increased and phosphorus content increased 1. 5- fold,and Al concentration had more than 49. 0% significant decrease compared to non- inoculated control under low pH and Al treatments.Meanwhile,the richness of mycorrhizal infection structures obviously changed. The arbuscular and external hyphal richness of Glomus spurcum significantly increased under low pH treatments. Arbuscular richness of Gigaspora margarita and Acaulospora mellea,and external hyphal richness of Scutellpora calospora significantly increased under Al treatments. Under low pH and Al treatments,Glomus etunicutum showed the increased external hyphal richness.This implied that there were different tolerant mechanisms to acid and Al toxicity among different AM species.

关 键 词：大豆 丛枝菌根真菌 低pH处理 铝处理 

分 类 号：S513.01[农业科学—作物学]