Actinobacteria for Biotic Stress Management

Sakure, Sunita; Bhosale, S. P.

doi:10.1007/978-981-13-6986-5_14

Cited by 6 publications

(6 citation statements)

References 72 publications

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“…Similarly, the fermentation products of Streptomyces sp. strain 5406 have been practised in China for decades to protect cotton from various soil‐borne diseases and were mainly attributed to its direct antagonistic effects against pathogens (Sakure & Bhosale, 2019 ). In the current study, the qPCR assay specifically for S. ahygroscopicus strain 769 indicated that the strain was not detectable in the rhizosphere, which might be attributed to the low viable cells in the extracts of S769 fermentation products and the fact that the field soil is acidic, which is less favourable for the growth and proliferation of Streptomyces spp.…”

Section: Discussionmentioning

confidence: 99%

Streptomyces‐triggered coordination between rhizosphere microbiomes and plant transcriptome enables watermelon Fusarium wilt resistance

Ge,

Li,

Liu

et al. 2024

Microbial Biotechnology

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The use of microbial inoculant is a promising strategy to improve plant health, but their efficiency often faces challenges due to difficulties in successful microbial colonization in soil environments. To this end, the application of biostimulation products derived from microbes is expected to resolve these barriers via direct interactions with plants or soil pathogens. However, their effectiveness and mechanisms for promoting plant growth and disease resistance remain elusive. In this study, we showed that root irrigation with the extracts of Streptomyces ahygroscopicus strain 769 (S769) solid fermentation products significantly reduced watermelon Fusarium wilt disease incidence by 30% and increased the plant biomass by 150% at a fruiting stage in a continuous cropping field. S769 treatment led to substantial changes in both bacterial and fungal community compositions, and induced a highly interconnected microbial association network in the rhizosphere. The root transcriptome analysis further suggested that S769 treatment significantly improved the expression of the MAPK signalling pathway, plant hormone signal transduction and plant–pathogen interactions, particular those genes related to PR‐1 and ethylene, as well as genes associated with auxin production and reception. Together, our study provides mechanistic and empirical evidences for the biostimulation products benefiting plant health through coordinating plant and rhizosphere microbiome interaction.

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Section: Discussionmentioning

confidence: 99%

Streptomyces‐triggered coordination between rhizosphere microbiomes and plant transcriptome enables watermelon Fusarium wilt resistance

Ge,

Li,

Liu

et al. 2024

Microbial Biotechnology

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“…PGPRs with ACCd activity enhance plant tolerance to biotic and abiotic stresses by reducing ET production in colonized roots and promoting plant growth [27,35]. It has been reported that Actinobacteria alleviate stress in plants by reducing ethylene levels in roots by secreting ACCd enzymes [44]. Patil et al revealed that bacterial strain Bradyrhizobium elkanii is an inhibitor in ethylene synthesis and alleviated the negative effect of stress-induced ethylene production on nodulation [45].…”

Section: Phytohormone Productionmentioning

confidence: 99%

“…P is a major growth-limiting nutrient despite being present in soil in abundancy in insoluble form. The soluble level of P in soil determines the P accessibility to plants [38,44].…”

Section: Solubilization Of Major Nutrientsmentioning

confidence: 99%

Beneficial Soil Microbiomes and Their Potential Role in Plant Growth and Soil Fertility

Vincze,

Becze,

Laslo

et al. 2024

Agriculture

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The soil microbiome plays an important role in maintaining soil health, plant productivity, and soil ecosystem services. Current molecular-based studies have shed light on the fact that the soil microbiome has been quantitatively underestimated. In addition to metagenomic studies, metaproteomics and metatranscriptomic studies that target the functional part of the microbiome are becoming more common. These are important for a better understanding of the functional role of the microbiome and for deciphering plant-microbe interactions. Free-living beneficial bacteria that promote plant growth by colonizing plant roots are called plant growth-promoting rhizobacteria (PGPRs). They exert their beneficial effects in different ways, either by facilitating the uptake of nutrients and synthesizing particular compounds for plants or by preventing and protecting plants from diseases. A better understanding of plant-microbe interactions in both natural and agroecosystems will offer us a biotechnological tool for managing soil fertility and obtaining a high-yield food production system.

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“…Siderophores produced under iron‐deficient conditions, are non‐ribosomal peptides and chelators of ferric ions that play a role in PPF biocontrol and oxidative stress tolerance (Khan et al, 2018). Actinobacteria are important producers of siderophore (Sakure & Bhosale, 2019; Saricaoglu et al, 2020) and are known to possess the ability to reduce ferric ions in both aqueous and solid forms (Zhang et al, 2019).…”

Section: Actinobacteria‐derived Agro Active Metabolites and Their Che...mentioning

confidence: 99%

“…Recent studies show that hydrolytic enzymes, such as protease, cellulase, chitinase and glucanase, are important in controlling plant fungal diseases by causing fungal cell wall lysis (Sakure & Bhosale, 2019). Actinobacteria are well known for their ability to degrade chitin, cellulose, starch, lipids and complex carbohydrates by the secretion of hydrolytic enzymes, and Streptomyces are the most prevalent group of enzyme producers.…”

Section: Actinobacteria‐derived Agro Active Metabolites and Their Che...mentioning

confidence: 99%

Potentiality of actinobacteria to combat against biotic and abiotic stresses in tea [Camellia sinensis (L) O. Kuntze]

Borah

Hazarika

Thakur

2022

Journal of Applied Microbiology

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Tea (Camellia sinensis (L) O. Kuntze) is a long-duration monoculture crop prone to several biotic (fungal diseases and insect pest) and abiotic (nutrient deficiency, drought and salinity) stress that eventually result in extensive annual crop loss. The specific climatic conditions and the perennial nature of the tea crop favour growth limiting abiotic factors, numerous plant pathogenic fungi (PPF) and insect pests. The review focuses on the susceptibility of tea crops to PPF/pests, drought, salinity and nutrient constraints and the potential role of beneficial actinobacteria in promoting tea crop health. The review also focuses on some of the major PPF associated with tea, such as Exobasidium vexans, Pestalotiopsis theae, Colletotrichum acutatum, and pests (Helopeltis theivora). The phylum actinobacteria own a remarkable place in agriculture due to the biosynthesis of bioactive metabolites that assist plant growth by direct nutrient assimilation, phytohormone production, and by indirect aid in plant defence against PPF and pests. The chemical diversity and bioactive significance of actinobacterial metabolites (antibiotics, siderophore, volatile organic compounds, phytohormones) are valuable in the agro-economy. This review explores the recent history of investigations in the role of actinobacteria and its secondary metabolites as a biocontrol agent and proposes a commercial application in tea cultivation.

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Actinobacteria for Biotic Stress Management

Cited by 6 publications

References 72 publications

Streptomyces‐triggered coordination between rhizosphere microbiomes and plant transcriptome enables watermelon Fusarium wilt resistance

Streptomyces‐triggered coordination between rhizosphere microbiomes and plant transcriptome enables watermelon Fusarium wilt resistance

Beneficial Soil Microbiomes and Their Potential Role in Plant Growth and Soil Fertility

Potentiality of actinobacteria to combat against biotic and abiotic stresses in tea [Camellia sinensis (L) O. Kuntze]

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