不同VA菌根真菌对玉米生长及抗旱性的影响

Effect of VA mycorrhizal fungi on the growth and drought resistance of maize

采用土培试验研究了水分胁迫条件下接种ＶＡ 菌根真菌Ｇｌｏｍ ｕｓｍ ｏｓｓｅａｅ，Ｇ．ｓｐ．和Ｇ．ｃａｌｅｄｏｎｉｕｍ 对玉米营养生长和抗旱性的影响。结果表明，水分胁迫严重抑制了植株的生长，但对ＶＡ 菌根真菌侵染能力影响不大。接种ＶＡ 菌根真菌不仅提高了植株磷和总氮含量，而且明显改善了植株的水分状况；接种株多种光合参数优于对照株，显著提高了接种株叶片的光合速率，增加植株干物质量，增强了玉米的抗旱性。３ 种真菌中，以Ｇｌｏｍ ｕｓ ｍ ｏｓｓｅａｅ的接种效果最好。

This paper studied the effects of VA mycorrhizal fungi Glomus mosseae,G.sp .and G.caledonium on the vegetative growth physiological metabolism and drought resistance of maize plant in pot culture under different water content.The results showed that water stress seriously repressed plant growth,but didnt greatly influence the growth and infection of VA mycorrhizal fungi.The P and total N content of plant increased and clearly improved plant water status by inoculation.Many photosynthesis parameters of inoculated plants surpassed those of the checking plants,significantly increasing photosynthesis efficiency of leaves,promoting plant dry weight,and promoting the drought resistance of maize plant.The results suggested that,among the three fungi, Glomus mosseae showed the highest resistance to drought and improvement in maize growth.