Plant Growth-Promoting Rhizobacteria HN6 Induced the Change and Reorganization of Fusarium Microflora in the Rhizosphere of Banana Seedlings to Construct a Healthy Banana Microflora

Yang, Deyou; Wang, Lanying; Wang, Tianhao; Zhang, Yunfei; Zhang, Shujing; Luo, Yunbo

doi:10.3389/fmicb.2021.685408

Cited by 7 publications

(9 citation statements)

References 74 publications

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“…abundance in the rhizosphere has been reported following PGP Streptomyces spp. inoculation (Yang et al, 2021). Further, the introduction of Bacillus velezensis NJAU‐Z9 was reported to shift bacterial and fungal communities and increase yield (Zhang et al, 2019), which is consistent with our findings.…”

Section: Discussionmentioning

confidence: 99%

“…This supports our explanation that SynCom treatment can change fungal community structure to confer better 5a, path 1 and 2 → 9] assume that SynComm application impacts the plant growth [number of flowers, plant height and root length] and productivity [yield] independently of SynComm-induced variations in soil biotic and abiotic properties via direct effects, that is, increase in plant growth and nutrient uptake via phytohormones like IAA, P-solubilisation and ammonia production [Mukherjee et al, 2020;Pereg & McMillan, 2015;Tabassum et al, 2017;Zhang et al, 2019]. The indirect effects of SynCom infer that microbial strain application impacts the plant variables through the changes in soil nitrogen and phosphorus concentration [Figure 5a, pathway 3 → 4] or soil microbiological properties [bacterial and fungal diversity and community structure; Figure 5a, path 5 → 7 → 9; Mukherjee et al, 2020;Pereg & McMillan, 2015;Tabassum et al, 2017;Yang et al, 2021]. The indirect effects of cultivar in our study assumes that cultivars affect soil microbiological and chemical properties [10 and 11, respectively], as well as plant growth and productivity [path 12 and 13, respectively;Hedden & Sponsel, 2015;Mukherjee et al, 2020;Pereg & McMillan 2015;Tabassum et al, 2017;Wei et al, 2019;Zhang et al, 2019]).…”

Section: Effect Of Syncom Application On Rhizosphere Microbesmentioning

confidence: 99%

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Synthetic community improves crop performance and alters rhizosphere microbial communities

Kaur

Egidi

Qiu

et al. 2022

J of Sust Agri & Env

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Introduction Harnessing synthetic communities (SynCom) of plant growth‐promoting (PGP) microorganisms is considered a promising approach to improve crop fitness and productivity. However, biotic mechanisms that underpin improved plant performance and the effects of delivery mode of synthetic community are poorly understood. These are critical knowledge gaps that constrain field efficacy of SynCom and hence large‐scale adoption by the farming community. Material & Methods In this study, a SynCom of four PGP microbial species was constructed and applied to either as seed dressing (treatment T1, applied at the time of sowing) or to soil (treatment T2, applied in soil at true leaf stage) across five different cotton (Gossypium hirsutum) cultivars. The impact of SynCom on plant growth, rhizosphere microbiome and soil nutrient availability, and how this was modified by plant variety and mode of applications, was assessed. Results Results showed that the seed application of SynCom had the strongest positive impact on overall plant fitness, resulting in higher germination (14.3%), increased plant height (7.4%) and shoot biomass (5.4%). A significant increase in the number of flowers (10.4%) and yield (8.5%) was also observed in T1. The soil nitrate availability was enhanced by 28% and 55% under T1 and T2, respectively. Results further suggested that SynCom applications triggered enrichment of members from bacterial phyla Actinobacteria, Firmicutes and Cyanobacteria in the rhizosphere. A shift in fungal communities was also observed, with a significant increase in the relative abundance of fungi from phyla Chytridiomycota and Basidiomycota in SynCom treatments. A structural equation model suggested that SynCom directly increased crop productivity but also indirectly via impacting the alpha diversity of bacteria. Conclusion Overall, this study provides mechanistic evidence that SynCom applications can shift rhizosphere microbial communities and improve soil fertility, plant growth, and crop productivity, suggesting that their use could contribute toward sustainable increase in farm productivity.

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Section: Discussionmentioning

confidence: 99%

Section: Effect Of Syncom Application On Rhizosphere Microbesmentioning

confidence: 99%

Synthetic community improves crop performance and alters rhizosphere microbial communities

Kaur

Egidi

Qiu

et al. 2022

J of Sust Agri & Env

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“…In the past few decades, many studies on the screening and identification of these bacteria have been reported. Moreover, there is a rich diversity of plant PGPR ( Gange and Gadhave, 2018 ; Yang et al, 2021 ). Many genera of PGPR have been identified, such as Bacillus, Brevibacillus, Pseudomonas, Agrobacterium, Burkholderia, Streptomyces , and Thiobacillu ( Guo et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

A Potential Biofertilizer—Siderophilic Bacteria Isolated From the Rhizosphere of Paris polyphylla var. yunnanensis

et al. 2022

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The increasing demands for crop production have become a great challenge while people also realizing the significance of reductions in synthetic chemical fertilizer use. Plant growth-promoting rhizobacteria (PGPR) are proven biofertilizers for increasing crop yields by promoting plant growth via various direct or indirect mechanisms. Siderophilic bacteria, as an important type of PGPR, can secrete siderophores to chelate unusable Fe3+ in the soil for plant growth. Siderophilic bacteria have been shown to play vital roles in preventing diseases and enhancing the growth of plants. Paris polyphylla var. yunnanensis (PPVY) is an important traditional Chinese herb. However, reports about its siderophilic bacteria are still rare. This study firstly isolated siderophilic bacteria from the rhizosphere soil of PPVY, identified by morphological and physio-biochemical characteristics as well as 16S rRNA sequence analysis. The dominant genus in the rhizobacteria of PPVY was Bacillus. Among 22 isolates, 21 isolates produced siderophores. The relative amount of siderophores ranged from 4 to 41%. Most of the isolates produced hydroxamate siderophores and some produced catechol. Four isolates belonging to Enterobacter produced the catechol type, and none of them produced carboxylate siderophores. Intriguingly, 16 strains could produce substances that have inhibitory activity against Candida albicans only in an iron-limited medium (SA medium). The effects of different concentrations of Fe3+ and three types of synthetic chemical fertilizers on AS19 growth, siderophore production, and swimming motility were first evaluated from multiple aspects. The study also found that the cell-free supernatant (CFS) with high siderophore units (SUs) of AS19 strain could significantly promote the germination of pepper and maize seeds and the development of the shoots and leaves of Gynura divaricata (Linn.). The bacterial solution of AS19 strain could significantly promote the elongation of the roots of G. divaricata (Linn.). Due to its combined traits promoting plant growth and seed germination, the AS19 has the potential to become a bioinoculant. This study will broaden the application prospects of the siderophilic bacteria-AS19 as biofertilizers for future sustainable agriculture.

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“…There are several studies on antibiotic production by antagonistic microbes, such as Bacillus sp., Pseudomonas sp., and Streptomyces sp. ( Beneduzi et al, 2012 ; Ngalimat et al, 2021 ; Yang et al, 2021 ). Bacillus spp., produce spores, which may be used to develop an effective microbial biopesticide formulation in the form of a biocontrol agent (BCA).…”

Section: Introductionmentioning

confidence: 99%

Identification and Characterization of Bacillus tequilensis GYUN-300: An Antagonistic Bacterium Against Red Pepper Anthracnose Caused by Colletotrichum acutatum in Korea

et al. 2022

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Anthracnose is a fungal disease caused by Colletotrichum species and has detrimental effects on many crops, including red pepper. This study used Bacillus tequilensis GYUN-300 (GYUN-300), which exhibit antagonistic activity against the fungal pathogen, Colletotrichum acutatum. This pathogen causes anthracnose that manifests primarily as a fruit rot in red pepper. There have been little efforts to identify antagonistic bacteria from mushrooms; this strain of bacteria was identified as B. tequilensis using BIOLOG and 16S rDNA sequencing analysis. The genetic mechanism underpinning the biocontrol traits of GYUN-300 was characterized using the complete genome sequence of GYUN-300, which was closely compared to related strains. GYUN-300 inhibited mycelial growth and spore germination of C. acutatum under in vitro conditions. Important antagonistic traits, such as siderophore production, solubilization of insoluble phosphate, and production of lytic enzymes (cellulase, protease, and amylase), were observed in GYUN-300, These trains promoted growth in terms of seed germination and vigorous seedling growth compared to the non-treated control. When red pepper fruits were treated with GYUN-300, the preventive and curative effects were 66.6 and 38.3% effective, respectively, in wounded red pepper fruits; there was no difference between the preventive and curative effects in non-wounded red pepper fruits. Furthermore, GYUN-300 was resistant to several commercial fungicides, indicating that GYUN-300 bacterial cells may also be used synergistically with chemical fungicides to increase biocontrol efficiency. Based on in vitro results, GYUN-300 played a role to control anthracnose disease effectively in field conditions when compared to other treatments and non-treated controls. The results from this study provide a better understanding of the GYUN-300 strain as an effective biocontrol agent against red pepper anthracnose; this form of biocontrol provides an environment-friendly alternative to chemical fungicides.

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Plant Growth-Promoting Rhizobacteria HN6 Induced the Change and Reorganization of Fusarium Microflora in the Rhizosphere of Banana Seedlings to Construct a Healthy Banana Microflora

Cited by 7 publications

References 74 publications

Synthetic community improves crop performance and alters rhizosphere microbial communities

Synthetic community improves crop performance and alters rhizosphere microbial communities

A Potential Biofertilizer—Siderophilic Bacteria Isolated From the Rhizosphere of Paris polyphylla var. yunnanensis

Identification and Characterization of Bacillus tequilensis GYUN-300: An Antagonistic Bacterium Against Red Pepper Anthracnose Caused by Colletotrichum acutatum in Korea

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