Background

The utilization of beneficial (Rhizo) bacteria, as an alternative to traditional fertilizers, has emerged as an eco-friendly strategy for ameliorating sustainable agricultural production. This approach aims to reduce the use of agrochemicals and minimize environmental pollution.

Scope

This review provides an updated insight into the ecological impact of plant growth-promoting rhizobacteria (PGPR), focusing on the resident microbiome and its potential transferability to the next generation of plants.

Conclusion

In this context, PGPR are assumed to alter the rhizosphere microbiome by outcompeting the existing taxa through nutrient deprivation, acidification of the environment, metabolites production, and consequently, increasing the copiotrophic taxa. Such modifications can maximize the beneficial interactions of plant-PGPR by increasing the bioavailability of nutrients and handling diverse signaling pathways. The effects of interactions within the PGPR-root system can adjust the composition of root exudates and influence the release of bioactive molecules by the root, especially under stress conditions, which can act as signals to reactivate and recruit the beneficial microbes in the rhizosphere and endosphere in favor of the plants. Such changes in microbiome structure can occur gradually over time, even if the survival rate of PGPR in soil and their re-colonization efficiency inside plant tissue are limited. The aforementioned modifications in the rhizosphere and plant microbiome have the potential to increase the survival chances of the progeny plants growing under the same stress conditions. Establishing a comprehensive and robust knowledge framework that addresses all of these issues is critical for significantly advancing the field of microbe-plant interactions and for developing reliable applications of PGPR.

中文翻译：

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植物促生根际细菌的遗传和生态遗传

 背景

利用有益（根）细菌作为传统肥料的替代品，已成为改善可持续农业生产的环保策略。该方法旨在减少农用化学品的使用并最大限度地减少环境污染。

 范围

这篇综述提供了对植物促生长根际细菌（PGPR）生态影响的最新见解，重点关注常驻微生物组及其向下一代植物的潜在转移性。

 结论

在这种情况下，假设 PGPR 通过营养剥夺、环境酸化、代谢物产生来超越现有类群，从而改变根际微生物组，从而增加富营养类群。这种修饰可以通过增加营养物质的生物利用度和处理不同的信号通路来最大化植物-PGPR 的有益相互作用。 PGPR-根系统内相互作用的影响可以调整根系分泌物的组成，并影响根部生物活性分子的释放，特别是在胁迫条件下，这可以作为重新激活和招募根际和内圈有益微生物的信号有利于植物。即使 PGPR 在土壤中的存活率及其在植物组织内的重新定殖效率有限，微生物组结构的这种变化也会随着时间的推移逐渐发生。上述对根际和植物微生物组的改变有可能增加在相同胁迫条件下生长的后代植物的生存机会。建立一个全面而强大的知识框架来解决所有这些问题对于显着推进微生物-植物相互作用领域和开发 PGPR 的可靠应用至关重要。