植酸钠对菌根真菌根内菌丝碱性磷酸酶活性及根外菌丝生长的影响

摘要/Abstract

摘要： 采用三室隔网培养装置,以玉米为宿主植物,接种丛枝菌根真菌(AM)(Glomus intraradices),研究了不同用量的植酸钠对AM真菌生长和代谢活性的影响.研究发现,接种AM真菌的植株地上部和根系的P浓度和吸P量,比非菌根植物的提高了1～2倍.外源植酸钠的存在,显著降低了AM真菌根内菌丝的碱性磷酸酶活性,增加了AM真菌在土壤中的菌丝密度.结果表明,外源植酸钠对根内AM真菌碱性磷酸酶活性和真菌根外菌丝的生长具有调控(增减)作用,并且AM真菌提高了植物对土壤固有养分和外源植酸钠中P的吸收和利用.

关键词: 丛枝菌根真菌, 植酸钠, 碱性磷酸酶, 根外菌丝

Abstract: In this paper,a pot experiment with three compartments was installed to study the effect of Na-phytate on the development and metabolic activity of AM fungi.Maize was selected as host plant and inoculated with arbuscular mycorrhizal fungus (Glomus intraradices),and different amounts of Na-phytate were applied into hyphal compartments.The results showed that the absorbed P in the shoots and roots of maize inoculated with AM fungi was 1～2 times higher than that of non inoculated maize.The ALP activity in intraradical hyphae of AM fungi was significantly decreased,and the total hyphal density of AM fungi increased with applied Na-phytate.Observations suggested that the ALP activity in intraradical hyphae of AM fungi and the development of its extraradical hyphae could be regulated by Na-phytate.Additionally,AM fungi could enhance the plant's P absorption and utilization from native soil P and additive Na-phytate.

Key words: AM fungus, Na-phytate, ALP, Extraradical hyphae

中图分类号:

Q949.32

冯海艳, 冯固, 王敬国, 李晓林. 植酸钠对菌根真菌根内菌丝碱性磷酸酶活性及根外菌丝生长的影响[J]. 应用生态学报, 2004, (6): 1009-1013.

FENG Haiyan, FENG Gu, WANG Jingguo, LI Xiaolin . Effect of sodium phytate on alkaline phosphatase (ALP) activity in intraradical hyphae of AM fungi and development of its extraradical hyphae[J]. Chinese Journal of Applied Ecology, 2004, (6): 1009-1013.

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