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The role of Plant Growth Promoting Bacteria in improving nitrogen use efficiency for sustainable crop production: a focus on wheat

机译:植物生长促进细菌在提高氮素利用效率以促进可持续作物生产中的作用:以小麦为重点

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摘要

Due to the increase in both human population growth and environmental pressure, it is necessary to raise agricultural productivity without enhancing environmental footprint. Within this context, soil inoculation with PGPB (Plant Growth Promoting Bacteria) may be considered a promising tool of integrated management systems. In particular, PGPB may improve plant growth either directly, by facilitating resource use or modulating plant hormone levels, or indirectly by decreasing the inhibitory effects of various pathogenic agents. PGPB comprise different functional and taxonomic groups of bacteria like Pseudomonas, Bacillus, Rhizobium and others. Their ability to either mobilize mineral or organic bound nutrients from the pedosphere or to fix atmospheric N2 and make it available to the plants, is a crucial feature in their application. In literature some data are available on the use of commercial PGPB, while less efforts have been made on the study of the effect of autochthonous PGPB isolated from soils on sustainability of cropping systems; thus a literature survey on these aspects was carried out with special focus on wheat, a staple food for a large part of world population. In particular, the main topic of this review is the potential of PGPB to enhance use efficiency of agro-environmental resources focusing on the interaction PGPB-wheat for improving nitrogen use efficiency.
机译:由于人口增长和环境压力的增加,有必要在不增加环境足迹的情况下提高农业生产率。在这种情况下,PGPB(植物生长促进细菌)接种土壤可能被认为是综合管理系统的有前途的工具。特别地,PGPB可以通过促进资源利用或调节植物激素水平直接改善植物生长,或通过降低各种病原体的抑制作用间接改善植物生长。 PGPB包括假单胞菌,芽孢杆菌,根瘤菌等细菌的不同功能和分类。它们有能力从土壤圈带动矿物或有机结合的养分,或固定大气中的N2并将其提供给植物,这是其应用中的关键特征。在文献中,有一些关于商业PGPB使用的数据,而在研究从土壤中分离出的本地PGPB对耕作系统可持续性的影响方面的工作却很少。因此,就这些方面进行了文献调查,重点是小麦,这是世界上很大一部分人口的主食。特别是,本综述的主要主题是PGPB在提高农业环境资源利用效率方面的潜力,重点在于PGPB-小麦之间的相互作用以提高氮利用效率。

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