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首页> 美国卫生研究院文献>Microorganisms >Potential PGPR Properties of Cellulolytic Nitrogen-Fixing Phosphate-Solubilizing Bacteria in Rehabilitated Tropical Forest Soil
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Potential PGPR Properties of Cellulolytic Nitrogen-Fixing Phosphate-Solubilizing Bacteria in Rehabilitated Tropical Forest Soil

机译：复垦过的热带森林土壤中纤维素分解固氮解磷细菌的潜在PGPR特性

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In the midst of the major soil degradation and erosion faced by tropical ecosystems, rehabilitated forests are being established to avoid the further deterioration of forest lands. In this context, cellulolytic, nitrogen-fixing (N-fixing), phosphate-solubilizing bacteria are very important functional groups in regulating the elemental cycle and plant nutrition, hence replenishing the nutrient content in forest soils. As is the case for other potential plant growth-promoting (PGP) rhizobacteria, these functional bacteria could have cross-functional abilities or beneficial traits that are essential for plants and can improve their growth. This study was conducted to isolate, identify, and characterize selected PGP properties of these three functional groups of bacteria from tropical rehabilitated forest soils at Universiti Putra Malaysia Bintulu Sarawak Campus, Malaysia. The bacteria were isolated based on their colonial growth on respective functional media, identified using both molecular and selected biochemical properties, and were assessed for their functional quantitative activities as well as PGP properties based on seed germination tests and indole-3-acetic acid (IAA) production. Out of the 15 identified bacterial isolates that exhibited beneficial phenotypic traits, a third belong to the genus and a fifth to sp., with both genera consisting of members from two different functional groups. The results of the experiments confirm the multiple PGP traits of some selected bacterial isolates based on their respective high functional activities, root and shoot lengths, and seedling vigor improvements when bacterized on mung bean seeds, as well as significant IAA production. The results of this study suggest that these functional bacterial strains could potentially be included in bio-fertilizer formulations for crop growth on acid soils.
机译：在热带生态系统面临的主要土壤退化和侵蚀之中，正在建立恢复原状的森林，以避免林地的进一步恶化。在这种情况下，纤维素分解，固氮（固氮），可溶解磷酸盐的细菌在调节元素周期和植物营养，从而补充森林土壤中的营养成分方面是非常重要的功能基团。与其他潜在的植物促生长（PGP）根瘤菌一样，这些功能性细菌可能具有交叉功能或对植物至关重要的有益性状，可以改善植物的生长。这项研究的目的是从马来西亚民都大学砂拉越校园的热带修复森林土壤中分离，鉴定和表征这三种功能细菌的PGP特性。根据细菌在各自功能性培养基上的菌落生长分离细菌，使用分子和选定的生化特性进行鉴定，并根据种子发芽试验和吲哚-3-乙酸（IAA）评估其功能性定量活性以及PGP特性。 ） 生产。在15种已鉴定出的表现出有益表型特征的细菌分离株中，第三种属于该属，第五种属于sp。，这两个属均由两个不同功能组的成员组成。实验结果证实了某些选定的细菌分离株具有多种PGP特性，这是由于它们在绿豆种子上进行杀菌时具有较高的功能活性，根和茎长以及幼苗活力的提高以及IAA的大量产生。这项研究的结果表明，这些功能性细菌菌株可能会包含在生物肥料配方中，以便在酸性土壤上生长作物。

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