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首页> 外文期刊>Microbiological Research >Synergistic interaction of Rhizobium leguminosarum bv. viciae and arbuscular mycorrhizal fungi as a plant growth promoting biofertilizers for faba bean (Vicia faba L.) in alkaline soil
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Synergistic interaction of Rhizobium leguminosarum bv. viciae and arbuscular mycorrhizal fungi as a plant growth promoting biofertilizers for faba bean (Vicia faba L.) in alkaline soil

机译：豆科根瘤菌的协同相互作用。蚕豆和丛枝菌根真菌作为一种植物生长促进碱性土壤中蚕豆（Vicia faba L.）的生物肥料

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Egyptian soils are generally characterized by slightly alkaline to alkaline pH values (7.5-8.7) which are mainly due to its dry environment. In arid and semi-arid regions, salts are less concentrated and sodium dominates in carbonate and bicarbonate forms, which enhance the formation of alkaline soils. Alkaline soils have fertility problems due to poor physical properties which adversely affect the growth and the yield of crops. Therefore, this study was devoted to investigating the synergistic interaction of Rhizobium and arbuscular mycorrhizal fungi for improving growth of faba bean grown in alkaline soil. A total of 20 rhizobial isolates and 4 species of arbuscular mycorrhizal fungi (AMF) were isolated. The rhizobial isolates were investigated for their ability to grow under alkaline stress. Out of 20 isolates 3 isolates were selected as tolerant isolates. These 3 rhizobial isolates were identified on the bases of the sequences of the gene encoding 16S rRNA and designated as Rhizobium sp. Egypt 16 (HM622137), Rhizobium sp. Egypt 27 (HM622138) and Rhizobium leguminosarum by. viciae STDF-Egypt 19 (HM587713). The best alkaline tolerant was R. leguminosarum by. viciae STDF-Egypt 19 (HM587713). The effect of R. leguminosarum by. viciae STDF-Egypt 19 and mixture of AMF (Acaulospora laevis, Glomus geosporum, Glomus mosseae and Scutellospora armeniaca) both individually and in combination on nodulation, nitrogen fixation and growth of Vicia faba under alkalinity stress were assessed. A significant increase over control in number and mass of nodules, nitrogenase activity, leghaemoglobin content of nodule, mycorrhizal colonization, dry mass of root and shoot was recorded in dual inoculated plants than plants with individual inoculation. The enhancement of nitrogen fixation of faba bean could be attributed to AMF facilitating the mobilization of certain elements such as P, Fe, K and other minerals that involve in synthesis of nitrogenase and leghaemoglobin. Thus it is clear that the dual inoculation with Rhizobium and AMF biofertilizer is more effective for promoting growth of faba bean grown in alkaline soils than the individual treatment, reflecting the existence of synergistic relationships among the inoculants
机译：埃及土壤的特征通常是略带碱性的碱性pH值（7.5-8.7），这主要归因于其干燥的环境。在干旱和半干旱地区，盐的浓度较低，而碳酸盐和碳酸氢盐形式的钠占主导地位，这会增加碱性土壤的形成。碱性土壤由于物理性能差而存在肥力问题，这不利地影响了作物的生长和单产。因此，本研究致力于研究根瘤菌与丛枝菌根真菌对改善碱性土壤中蚕豆生长的协同作用。总共分离出20种根瘤菌分离株和4种丛枝菌根真菌（AMF）。研究了根瘤菌分离物在碱性胁迫下的生长能力。从20个分离株中选择3个分离株作为耐性分离株。根据编码16S rRNA的基因序列鉴定了这3个根瘤菌分离株，并命名为根瘤菌sp。埃及16（HM622137），根瘤菌属。埃及27（HM622138）和豆科根瘤菌所制。 viciae STDF-Egypt 19（HM587713）。最佳的耐碱性是豆科植物根瘤菌。 viciae STDF-Egypt 19（HM587713）。由豆科植物豆角菌的作用。分别评估了蚕豆STDF-Egypt 19和AMF的混合物（Ac草，格鲁莫斯霉菌，格氏小豆和盾形S）的结瘤，固氮和在碱性胁迫下蚕豆的固氮和生长。与单独接种的植物相比，双重接种的植物中结节的数量和质量，固氮酶活性，结节的血红蛋白含量，菌根定植，根和茎干质量的控制均显着增加。蚕豆固氮能力的提高可能归因于AMF促进了某些元素的动员，例如P，Fe，K和其他涉及固氮酶和豆血红蛋白合成的矿物质。因此，很明显，与单独处理相比，根瘤菌和AMF生物肥料的双重接种比碱性处理对促进碱性土壤中生长的蚕豆的生长更有效，这反映了孕育剂之间存在协同关系。

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