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) (Glomusintraradices) ,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 。
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.
出处
《应用生态学报》
CAS
CSCD
2004年第6期1009-1013,共5页
Chinese Journal of Applied Ecology
基金
中国-欧洲联盟合作资助项目 (MYCHINTEC ICA4 CT 2 0 0 0 3 0 0 14 ) .
