Microbial inoculation alters rhizoplane bacterial community and correlates with increased rice yield

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia Pub Date : 2024-03-02 DOI:10.1016/j.pedobi.2024.150945

Ke Huang , Hongyang Yin , Qianru Zheng , Wen Lv , Xintao Shen , Min Ai , Yuan Zhao

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引用次数: 0

Abstract

Microbial inoculants are recognized as environmentally friendly methods to promote plant growth and improve soil properties. However, the effects of inoculation on the rhizosphere and rhizoplane community structure of plants remain poorly documented and need further investigation. Rhodopseudomonas palustris (R. palustris) strain has nitrogen fixing ability and Bacillus subtilis (B. subtilis) strain is a plant growth-promoting rhizobacterium (PGPR). In this study, we investigated the effects of single and co-inoculation with R. palustris and B. subtilis on the increase of rice yield as well as on the microbial communities in the rhizosphere and rhizoplane of rice through potting experiments, respectively. The results showed that inoculation significantly increased rice yield and seed setting rate, with co-inoculation raising the yield by up to 13.7%. Inoculation influenced both rhizosphere and rhizoplane community structures and functions, amplifying the differences between them. The most significant changes were brought about by the combined inoculation treatment. Co-inoculation with R. palustris and B. subtilis had a synergistic effect. The profound alterations of rhizoplane bacterial community structures and functions were proved to be positively correlated with rice yield and seed setting rate (r = 0.59–0.76, p < 0.05). These results provide new ideas for the investigation of the potential microbiological mechanisms of microbial co-inoculation in practical agricultural applications.

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微生物接种会改变根瘤菌群落，并与水稻增产有关

微生物接种剂被认为是促进植物生长和改善土壤性质的环保方法。然而，接种对植物根瘤菌层和根瘤群落结构的影响仍鲜有记载，需要进一步研究。()菌株具有固氮能力，()菌株是一种植物生长促进根瘤菌（PGPR）。本研究通过盆栽实验，分别研究了单一接种和联合接种（）菌株对水稻增产的影响，以及对水稻根圈和根面微生物群落的影响。结果表明，接种能显著提高水稻产量和结实率，联合接种能提高产量达 13.7%。接种对根圈和根面群落结构和功能都有影响，扩大了两者之间的差异。联合接种处理带来的变化最为明显。与和共同接种会产生协同效应。根瘤菌群落结构和功能的显著变化与水稻产量和结实率呈正相关（=0.59 - 0.76，< 0.05）。这些结果为研究微生物共接种在实际农业应用中的潜在微生物机制提供了新思路。

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来源期刊

Pedobiologia 环境科学-生态学

CiteScore

4.20

自引率

8.70%

发文量

审稿时长

64 days

期刊介绍： Pedobiologia publishes peer reviewed articles describing original work in the field of soil ecology, which includes the study of soil organisms and their interactions with factors in their biotic and abiotic environments. Analysis of biological structures, interactions, functions, and processes in soil is fundamental for understanding the dynamical nature of terrestrial ecosystems, a prerequisite for appropriate soil management. The scope of this journal consists of fundamental and applied aspects of soil ecology; key focal points include interactions among organisms in soil, organismal controls on soil processes, causes and consequences of soil biodiversity, and aboveground-belowground interactions. We publish: original research that tests clearly defined hypotheses addressing topics of current interest in soil ecology (including studies demonstrating nonsignificant effects); descriptions of novel methodological approaches, or evaluations of current approaches, that address a clear need in soil ecology research; innovative syntheses of the soil ecology literature, including metaanalyses, topical in depth reviews and short opinion/perspective pieces, and descriptions of original conceptual frameworks; and short notes reporting novel observations of ecological significance.