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作 者 ：秦子娴 朱敏 郭涛

期 刊 ：植物营养与肥料学报 2013年 19卷 2期 页码：510-516

关键词：丛枝菌根真菌；干旱胁迫；生理生化；有效磷；

Keywords:arbuscular mycorrhiza, water stress, physiology and biochemistry, available phosphorus,

摘 要 ： 在土壤有效磷含量较高的条件下，研究了接种丛枝菌根真菌（arbuscular mycorrhizal fungus, AMF）对不同水分处理梯度（田间最大持水量的70%、 45%和20%）条件下玉米生长和抗旱性的影响。结果表明，在三种不同水分处理条件下，接种AMF显著提高了玉米植株地上部的生物量，且对玉米地上部、 地下部全磷含量有显著提高作用。水分胁迫显著降低了玉米叶片水势，增加了玉米叶片脯氨酸、 丙二醛、 过氧化物酶和过氧化氢酶含量，而不同水分梯度条件下接种AMF均显著提高了植株叶片水势，降低了脯氨酸含量，提高了叶片保护酶（过氧化物酶和过氧化氢酶）活性从而减少丙二醛的积累，减轻植物叶片膜脂过氧化的伤害。由此说明，接种AMF在土壤有效磷含量较高的条件下能够与玉米根系形成良好的共生关系，提高玉米的抗旱性。

Abstract:To study the arbuscular mycorrhiza inoculation on growth and drought resistance of maize (Zea mays) in soils with high phosphorus availability, a pot experiments was carried out by the inoculation of Glomus intraradices and Glomus etunicatum. There were three irrigation levels, 70%, 45% and 20% of soil field capacity. The results show that compare to the non-mycorrhizal treatment, the mycorrhizal inoculation increases the host plant shoot and the phosphorus contents of shoots and roots significantly. Hydraulic potential, the contents of prolin, POD and CAT of maize leaves are decreased under the treatments with 45% and 20% of soil field capacity. The mycorrhizal inoculation increases the hydraulic potential, POD and CAT activities and decreases prolin concentration of host plants which relieve membrane lipid peroxidation caused by water stress. It can conclude that arbuscular mycorrhiza fungus could form symbiosis with host plants and improve drought resisting ability even under high soil phosphorus availability.

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