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《Journal of Laiyang Agricultural College》 1989-01
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Liu Runjin (Dept.of Hort.,LAC)  
Effects of VA fungi(Glmus versifome Daniel et Trappe and Glmus macrocarpum Tul et Tul)on the water status and growth of apple (Malus hupehensis.Rehd.)seedlings grown in pot were studied under conditions of ample moisture supply and water stress respectively.The seedlings were grown in sterilized or unsterilized soils with or without phosphorus added.In sterilized soil,VA mycorrhizal infection increased the relative water content and the stomatal transpiration rate of leaves,reduced the stomata1 resistance,water potential and the permanent wilting percentage(PWP)ofleaves,improved the drouht tolerance,enhenced the rate of recovery from the water stress and the growth of the plants(such as plant height,leaf number and so on).In sterilized soil with phosphorus added VA mycorrhizal infection improved the water status of the plants only under severe drought conditoin and had some positive effects on the increase of the drought tolerance and growth of the plants.The effects of VAM inoculation in unsterilized soil were not obvious.The effects of inoculations varied with inocula.The hypha of VAM took part in the procedure of water transportation.
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