丛枝菌根（AM）与植物的抗逆性

菌根是土壤中的菌根真菌与高等植物的根系形成的一种联合体 ,是自然界中一种普遍的植物共生现象。除十字花科、莎草科、藜科等少数几个科不能或不易形成菌根外 ,大多数植物包括苔藓、蕨类、裸子植物、被子植物都能形成菌根。 AM是其中的一类 ,也是目前研究较多的一类。AM的内外生菌丝不仅增加了根系的吸收面积 ,还能分泌多种有益物质。所以 ,AM对植物养分、水分的吸收与运输 ,对植物抵抗各种胁迫是十分有益的。1　AM与植物的抗旱性随着全球干旱面积的不断增加 ,淡水资源的日益减少 ,干旱研究已受到人们极大的关注。由于菌根的特殊作用和…

Effects of Arbuscular Mycorrhiza on Resistance of Plants to Environmental Stress

Due to occasionally changing natural environment,plants are always threatened by drought, waterlogging ,high or low temperature,acidity,saline-alkali and so on.Therefore,the physiological,biochemical and ecological studies on plants under environmental stress have become a hot field.Much research indicates that AM can improve the ability of plants to resist environmental stress.This article briefly reviewed the recent studies about the effects of AM on resistance of plants to environmental stress,especially to drought,saline and acidity,and the possible physiological and biochemical mechanisms are discussed as well.