Heat-killed endophytic bacterium induces robust plant defense responses against important pathogens

Portieles, Roxana; Xu, Hongmin; Yue, Qiulin; Zhao, Lin; Zhang, Dening; Du, Lihua; Gao, Xiangyou; Gao, Jingyao; González, Nayanci Portal; Bermúdez, Ramón Santos; Borrás‐Hidalgo, Orlando

doi:10.1038/s41598-021-91837-5

Cited by 17 publications

(12 citation statements)

References 93 publications

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“…Heat-killed endophytic strain B. aryabhattai (HKEB) induced defense-related genes protein (PR1) and phytoalexin-deficient 3 in A. thaliana . PR1 gene expression was found to be 20-fold higher in treated plants than control, and other genes found in the study were associated with jasmonic and salicylic acid pathways (Portieles et al, 2021 ). Endophytes exhibit different gene upregulation and a distinct signaling pathway in response to distinct colonization strategies (Morelli et al, 2020 ).…”

Section: Role Of Biofertilizers In Biotic Stress Managementmentioning

confidence: 85%

“…In a study by Samain et al ( 2019 ), Paenibacillus strain (PB2) used to control Mycosphaerella graminicola induced pathogenesis-related proteins (PR1) which is considered as marker of SAR. Application of Bacillus aryabhattai activated a durable defense response against pathogens facilitated through salicylic acid/ethylene pathways (Portieles et al, 2021 ). Trichoderma harzianum helps to improve plant immediate resistance against Nezara viridula feeding invasion via enhancing JA marker gene transcript levels (Alınç et al, 2021 ).…”

Section: Role Of Biofertilizers In Biotic Stress Managementmentioning

confidence: 99%

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Overview of biofertilizers in crop production and stress management for sustainable agriculture

Chaudhary

Singh²,

Chaudhary³

et al. 2022

Front. Plant Sci.

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With the increase in world population, the demography of humans is estimated to be exceeded and it has become a major challenge to provide an adequate amount of food, feed, and agricultural products majorly in developing countries. The use of chemical fertilizers causes the plant to grow efficiently and rapidly to meet the food demand. The drawbacks of using a higher quantity of chemical or synthetic fertilizers are environmental pollution, persistent changes in the soil ecology, physiochemical composition, decreasing agricultural productivity and cause several health hazards. Climatic factors are responsible for enhancing abiotic stress on crops, resulting in reduced agricultural productivity. There are various types of abiotic and biotic stress factors like soil salinity, drought, wind, improper temperature, heavy metals, waterlogging, and different weeds and phytopathogens like bacteria, viruses, fungi, and nematodes which attack plants, reducing crop productivity and quality. There is a shift toward the use of biofertilizers due to all these facts, which provide nutrition through natural processes like zinc, potassium and phosphorus solubilization, nitrogen fixation, production of hormones, siderophore, various hydrolytic enzymes and protect the plant from different plant pathogens and stress conditions. They provide the nutrition in adequate amount that is sufficient for healthy crop development to fulfill the demand of the increasing population worldwide, eco-friendly and economically convenient. This review will focus on biofertilizers and their mechanisms of action, role in crop productivity and in biotic/abiotic stress tolerance.

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Section: Role Of Biofertilizers In Biotic Stress Managementmentioning

confidence: 85%

Section: Role Of Biofertilizers In Biotic Stress Managementmentioning

confidence: 99%

Overview of biofertilizers in crop production and stress management for sustainable agriculture

Chaudhary

Singh²,

Chaudhary³

et al. 2022

Front. Plant Sci.

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Section: Methodsmentioning

confidence: 99%

“…The bacterium Bacillus aryabhattai was previously isolated and identified from the wild plant species Glyceria chinensis (Keng) according to Portieles et al [26]. Samples were collected from the wild plant species G. chinensis (Keng) along the Fu Tuan River (35˚20 0 17 00 N, 1192 6 0 8 00 E) within 5 km of the coastal region of Rizhao city in Shandong Province, People's Republic of China.…”

Section: Endophytic Bacterium Plant Materials and Growth Conditionsmentioning

confidence: 99%

Endophytic bacterium Bacillus aryabhattai induces novel transcriptomic changes to stimulate plant growth

Xu¹,

Gao²,

Portieles³

et al. 2022

PLoS ONE

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In nature, plants interact with a wide range of microorganisms, and most of these microorganisms could induce growth through the activation of important molecular pathways. The current study evaluated whether the endophytic bacterium Bacillus aryabhattai encourages plant growth and the transcriptional changes that might be implicated in this effect. The endophytic bacterium promotes the growth of Arabidopsis and tobacco plants. The transcriptional changes in Arabidopsis plants treated with the bacterium were also identified, and the results showed that various genes, such as cinnamyl alcohol dehydrogenase, apyrase, thioredoxin H8, benzaldehyde dehydrogenase, indoleacetaldoxime dehydratase, berberine bridge enzyme-like and gibberellin-regulated protein, were highly expressed. Also, endophytic bacterial genes, such as arginine decarboxylase, D-hydantoinase, ATP synthase gamma chain and 2-hydroxyhexa-2,4-dienoate hydratase, were activated during the interaction. These findings demonstrate that the expression of novel plant growth-related genes is induced by interaction with the endophytic bacterium B. aryabhattai and that these changes may promote plant growth in sustainable agriculture.

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“…Previous studies have shown that some endophytic bacteria activate plant defense reactions against biotrophic and necrotrophic plant pathogens. In some pathosystems, induction of defense reactions was mediated by the upregulation of PR genes ( Asghari et al, 2020 ; Portieles et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of Endophytic Bacteria Against Sugar Beet Root Rot Agent by Volatile Organic Compound Production and Induction of Systemic Resistance

Safara

Harighi²,

Bahramnejad³

et al. 2022

Front. Microbiol.

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The volatile organic compounds (VOCs) produced by endophytic bacteria have a significant role in the control of phytopathogens. In this research, the VOCs produced by the endophytic bacteria Streptomyces sp. B86, Pantoea sp. Dez632, Pseudomonas sp. Bt851, and Stenotrophomonas sp. Sh622 isolated from healthy sugar beet (Beta vulgaris) and sea beet (Beta maritima) were evaluated for their effects on the virulence traits of Bacillus pumilus Isf19, the causal agent of harvested sugar beet root rot disease. The gas chromatographymass spectrometry (GC-MS) analysis revealed that B86, Dez632, Bt851, and Sh622 produced 15, 28, 30, and 20 VOCs, respectively, with high quality. All antagonistic endophytic bacteria produced VOCs that significantly reduced soft root symptoms and inhibited the growth of B. pumilus Isf19 at different levels. The VOCs produced by endophytic bacteria significantly reduced swarming, swimming, and twitching motility by B. pumilus Isf19, which are important to pathogenicity. Our results revealed that VOCs produced by Sh622 and Bt851 significantly reduced attachment of B. pumilus Isf19 cells to sugar beetroots, and also all endophytic bacteria tested significantly reduced chemotaxis motility of the pathogen toward root extract. The VOCs produced by Dez632 and Bt851 significantly upregulated the expression levels of defense genes related to soft rot resistance. Induction of PR1 and NBS-LRR2 genes in sugar beetroot slices suggests the involvement of SA and JA pathways, respectively, in the induction of resistance against pathogen attack. Based on our results, the antibacterial VOCs produced by endophytic bacteria investigated in this study can reduce soft rot incidence.

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Heat-killed endophytic bacterium induces robust plant defense responses against important pathogens

Cited by 17 publications

References 93 publications

Overview of biofertilizers in crop production and stress management for sustainable agriculture

Overview of biofertilizers in crop production and stress management for sustainable agriculture

Endophytic bacterium Bacillus aryabhattai induces novel transcriptomic changes to stimulate plant growth

Antibacterial Activity of Endophytic Bacteria Against Sugar Beet Root Rot Agent by Volatile Organic Compound Production and Induction of Systemic Resistance

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