Effects of arbuscular mycorrhizal fungi on leaf solutes and root absorption areas of trifoliate orange seedlings under water stress conditions |
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| Authors: | Qiangsheng Wu Renxue Xia |
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| Institution: | (1) Key Laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, 430070, China;(2) College of Horticulture and Gardening, Yangtze University, Jingzhou, 434025, China |
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| Abstract: | The effects of the arbuscular mycorrhizal (AM) fungus Glomus mosseae on plant growth, leaf solutes and root absorption area of trifoliate orange (Poncirus trifoliata (L.) Raf.) seedlings were studied in potted culture under water stress conditions. Inoculation with G. mosseae increased plant height, stem diameter, leaf area, shoot dry weight, root dry weight and plant dry weight, when the soil water
content was 20%, 16% and 12%. AM inoculation also promoted the active and total absorption area of root system and absorption
of phosphorus from the rhizosphere, enhanced the content of soluble sugar in leaves and roots, and reduced proline content
in leaves. AM seedings had higher plant water use efficiency and higher drought tolerance than non-AM seedlings. Effects of
G. mosseae inoculation on trifoliate orange seedlings under 20% and 16% soil water content were more significant than under 12% soil
water content. AM infection was severely restrained by 12% soil water content. Thus, effects of AM fungi on plants were probably
positively related to the extent of root colonization by AM fungi. The mechanism of AM fungi in enhancing drought resistance
of host plants ascribed to greater osmotic adjustment and greater absorption area of root system by AM colonization.
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Translated from Journal of Plant Physiology and Molecular Biology, 2005, 30(5): 583–588 译自: 植物生理与分子生物学报, 2005, 30(5): 583–588] |
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| Keywords: | arbuscular mycorrhizal fungi trifoliate orange |
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