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首页> 外文期刊>Biotechnology Advances: An International Review Journal >The role of mycorrhizae and plant growth promoting rhizobacteria (PGPR) in improving crop productivity under stressful environments.
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The role of mycorrhizae and plant growth promoting rhizobacteria (PGPR) in improving crop productivity under stressful environments.

机译：菌根和植物生长促进根瘤菌（PGPR）在提高胁迫环境下的作物生产力中的作用。

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摘要

Both biotic and abiotic stresses are major constrains to agricultural production. Under stress conditions, plant growth is affected by a number of factors such as hormonal and nutritional imbalance, ion toxicity, physiological disorders, susceptibility to diseases, etc. Plant growth under stress conditions may be enhanced by the application of microbial inoculation including plant growth promoting rhizobacteria (PGPR) and mycorrhizal fungi. These microbes can promote plant growth by regulating nutritional and hormonal balance, producing plant growth regulators, solubilizing nutrients and inducing resistance against plant pathogens. In addition to their interactions with plants, these microbes also show synergistic as well as antagonistic interactions with other microbes in the soil environment. These interactions may be vital for sustainable agriculture because they mainly depend on biological processes rather than on agrochemicals to maintain plant growth and development as well as proper soil health under stress conditions. A number of research articles can be deciphered from the literature, which shows the role of rhizobacteria and mycorrhizae alone and/or in combination in enhancing plant growth under stress conditions. However, in contrast, a few review papers are available which discuss the synergistic interactions between rhizobacteria and mycorrhizae for enhancing plant growth under normal (non-stress) or stressful environments. Biological interactions between PGPR and mycorrhizal fungi are believed to cause a cumulative effect on all rhizosphere components, and these interactions are also affected by environmental factors such as soil type, nutrition, moisture and temperature. The present review comprehensively discusses recent developments on the effectiveness of PGPR and mycorrhizal fungi for enhancing plant growth under stressful environments. The key mechanisms involved in plant stress tolerance and the effectiveness of microbial inoculation for enhancing plant growth under stress conditions have been discussed at length in this review. Growth promotion by single and dual inoculation of PGPR and mycorrhizal fungi under stress conditions have also been discussed and reviewed comprehensively.
机译：生物和非生物胁迫都是农业生产的主要制约因素。在胁迫条件下，植物生长受到多种因素的影响，例如激素和营养失衡，离子毒性，生理失调，对疾病的易感性等。在胁迫条件下，植物生长可通过应用微生物接种（包括促进植物生长）来增强根瘤菌（PGPR）和菌根真菌。这些微生物可通过调节营养和荷尔蒙平衡，产生植物生长调节剂，增溶养分并诱导对植物病原体的抗性来促进植物生长。除了与植物的相互作用外，这些微生物还与土壤环境中的其他微生物表现出协同作用和拮抗作用。这些相互作用对于可持续农业可能至关重要，因为它们主要依靠生物过程而不是农用化学物质来维持植物的生长和发育以及在胁迫条件下保持适当的土壤健康。可以从文献中破译许多研究文章，这些文章显示了根瘤菌和菌根单独和/或组合在一起在胁迫条件下促进植物生长的作用。但是，相比之下，有几篇评论文章讨论了根际细菌和菌根之间的协同相互作用，以增强正常（非胁迫）或胁迫环境下的植物生长。 PGPR和菌根真菌之间的生物相互作用被认为会对所有根际成分产生累积影响，并且这些相互作用还受到诸如土壤类型，营养，水分和温度等环境因素的影响。本综述全面讨论了PGPR和菌根真菌在胁迫环境下促进植物生长的有效性的最新进展。在这篇综述中详细讨论了植物抗逆性的关键机制以及微生物接种在逆境条件下促进植物生长的有效性。 PGPR和菌根真菌在压力条件下单次和二次接种对促进生长的作用也已进行了讨论和综述。

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