The auxin-like effect of substrate and auxin sensitivity of plant modulate the PGPR activity of Lysinibacillus pinottii sp. nov. PB211

IF 5.2 2区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Chemical and Biological Technologies in Agriculture Pub Date : 2024-11-12 DOI:10.1186/s40538-024-00691-w

Manuel Pantoja-Guerra, Nelson Valero-Valero, Camilo A. Ramirez

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Abstract

Background

Bacterial auxin production is a mechanism that promotes plant growth. However, it can also be linked to deleterious rhizobacteria and plant-pathogenic bacteria. High levels of auxins have the potential to impede plant growth. Additionally, certain environmental factors can enhance auxin activity and impact the activity of plant growth-promoting rhizobacteria (PGPR).

Results

In this work, we boarded how the auxin-like effect in the soil–plant system modulates the plant growth-promoting activity of Lysinibacillus pinottii sp. nov. PB211. The effect of humified organic matter (HOM) soil was simulated with humic acids (HA) coming from vermicompost; the spectral configuration (¹³C-CP-TOSS-NMR and FTIR) and coleoptile elongation test indicated its bioactivity. Cucumber exhibits a PGP effect of PB211 and HA at a lower concentration compared to corn. This disparity agrees with the differential sensitivity to auxins of both plant models. Monocot plants, such as corn, generally exhibit greater resistance to exogenous auxin activity compared to eudicot plants, such as cucumber. The presence of HA in the growth substrate (sand) is found to modulate the PGPR activity of PB211, resulting in a loss of PGPR activity.

Conclusions

The findings highlight the importance of considering the cumulative auxin-like effects in the soil–plant system when utilizing bacterial inoculants for plant growth promotion in agriculture.

Graphical Abstract

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底物的类辅助素效应和植物对辅助素的敏感性调控皮诺氏赖氨酸杆菌（Lysinibacillus pinottii sp.PB211

背景细菌产生的辅助素是一种促进植物生长的机制。然而，它也可能与有害根瘤菌和植物病原菌有关。高水平的辅酶有可能阻碍植物生长。此外，某些环境因素会增强辅酶的活性，并影响植物生长促进根瘤菌（PGPR）的活性。结果在这项工作中，我们研究了土壤-植物系统中的类辅酶效应如何调节 Lysinibacillus pinottii sp.PB211。用来自蛭石堆肥的腐殖酸（HA）模拟了腐殖化有机物（HOM）土壤的效应；其光谱构型（13C-CP-TOSS-NMR 和 FTIR）和叶柄伸长试验表明了其生物活性。与玉米相比，黄瓜在较低浓度下表现出 PB211 和 HA 的 PGP 效应。这种差异与两种植物模型对辅助剂的不同敏感性相吻合。与黄瓜等裸子植物相比，玉米等单子叶植物通常对外源辅助素活性表现出更强的抵抗力。结论：研究结果突出表明，在农业中利用细菌接种剂促进植物生长时，必须考虑土壤-植物系统中类似于辅助素的累积效应。

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来源期刊

Chemical and Biological Technologies in Agriculture Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

6.80

自引率

3.00%

发文量

审稿时长

15 weeks

期刊介绍： Chemical and Biological Technologies in Agriculture is an international, interdisciplinary, peer-reviewed forum for the advancement and application to all fields of agriculture of modern chemical, biochemical and molecular technologies. The scope of this journal includes chemical and biochemical processes aimed to increase sustainable agricultural and food production, the evaluation of quality and origin of raw primary products and their transformation into foods and chemicals, as well as environmental monitoring and remediation. Of special interest are the effects of chemical and biochemical technologies, also at the nano and supramolecular scale, on the relationships between soil, plants, microorganisms and their environment, with the help of modern bioinformatics. Another special focus is the use of modern bioorganic and biological chemistry to develop new technologies for plant nutrition and bio-stimulation, advancement of biorefineries from biomasses, safe and traceable food products, carbon storage in soil and plants and restoration of contaminated soils to agriculture. This journal presents the first opportunity to bring together researchers from a wide number of disciplines within the agricultural chemical and biological sciences, from both industry and academia. The principle aim of Chemical and Biological Technologies in Agriculture is to allow the exchange of the most advanced chemical and biochemical knowledge to develop technologies which address one of the most pressing challenges of our times - sustaining a growing world population. Chemical and Biological Technologies in Agriculture publishes original research articles, short letters and invited reviews. Articles from scientists in industry, academia as well as private research institutes, non-governmental and environmental organizations are encouraged.