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首页> 外文期刊>Advances in Bioscience and Biotechnology >Occurrence and distribution of arbuscular mycorrhizal fungi and microbial flora in the rhizosphere soils of mungbean [vigna radiata (L.) wilczek] and soybean [glycine max (L.) Merr.] from Adilabad, Nizamabad and Karimnagar districts of Andhra Pradesh state, India
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Occurrence and distribution of arbuscular mycorrhizal fungi and microbial flora in the rhizosphere soils of mungbean [vigna radiata (L.) wilczek] and soybean [glycine max (L.) Merr.] from Adilabad, Nizamabad and Karimnagar districts of Andhra Pradesh state, India

机译：印度安得拉邦阿迪拉巴德，尼扎马巴德和卡里姆纳加尔地区的绿豆[vigna radiata（L.）wilczek]和大豆[glycine max（L.）Merr。]的根际土壤中丛枝菌根真菌和微生物菌群的发生和分布

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Arbuscular Mycorrhizal (AM) fungi are key components of soil microbiota and obviously interact with other microorganisms in the rhizosphere which is the zone of influence of plant roots on microbial populations and other soil constituents. The microbial associates are more prone to general and annual fluctuations besides several abiotic factors such as environment and climatic factors which influence the whole process of AM - microbial interactions. Keeping in view, the importance of AM fungi the present study was undertaken for assessing the AM fungal spore population dynamics in the rhizosphere soil and its colonization, microbial (bacterial and fungal) population distribution in rhizosphere and nonrhizosphere soils as a function of seasonal variation in relation to soil physico-chemical factors associated with two legume crop plants collected from different districts of Andhra Pradesh state, India. AM fungal propagules and species were found to be well distributed varying in number from 12 to 89 spores per 10 gram soil in mungbean and 46 to 90 spores in soybean rhizosphere soils and percent root colonization in mungbean ranged from 36.74 to 90.68% however, in soybean it ranged from 23.58 to 76.92%. The 24 AM fungal species representing 4 genera were isolated, Glomus represented 12 spp. forming predominant genus. The Pearson Correlation coefficient data showed that the microbial population and AM fungal population and species, the degree of root colonization by native AM fungi varied significantly in two legume crop plants and influenced by soil edaphic factors. Significant negative correlation was recorded between root colonization and mean spore density of both the crops indicating that low levels of spore density are associated with high root colonization. The quantity and type of AM propagules also affected the dynamics of root colonization, which were also increased by increase in age of the crop plant.
机译：丛枝菌根（AM）真菌是土壤微生物的关键组成部分，并且明显与根际中的其他微生物相互作用，根际是植物根系对微生物种群和其他土壤成分的影响区域。除一些非生物因素（例如影响AM-微生物相互作用的整个过程的环境和气候因素）外，微生物伴生物更容易出现总体和年度波动。考虑到AM真菌的重要性，本研究旨在评估根际土壤中AM真菌孢子种群动态及其在根际和非根际土壤中的定殖，微生物（细菌和真菌）种群分布，并作为季节变化的函数。与印度安得拉邦不同地区的两种豆类作物植物相关的土壤理化因子之间的关系。发现AM真菌的繁殖体和种类分布良好，在绿豆中每10克土壤中孢子数量为12至89孢子，在大豆根际土壤中为46至90孢子，而在大豆中，绿豆的根定居百分比为36.74至90.68％。介于23.58％至76.92％之间。分离出代表4个属的24 AM真菌物种，Glomus代表12 spp。形成主要属。皮尔逊相关系数数据显示，两种豆类作物植物中微生物种群和AM真菌种群和物种，天然AM真菌的根定殖程度在土壤植物中受到显着影响。两种作物的根部定植和平均孢子密度之间均显示出显着的负相关性，表明低水平的孢子密度与高根定植有关。 AM繁殖体的数量和类型也影响了根部定植的动态，而根部定植的动态也随着作物年龄的增长而增加。

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