Plant Growth Promoting Endophytes and their Interaction with Plants to Alleviate Abiotic Stress

Vardharajula, Sandhya; SkZ, Ali; Vurukonda, Sai Shiva Krishna Prasad; Shrivastava, Manjari

doi:10.2174/2211550106666161226154619

Cited by 22 publications

(11 citation statements)

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“… Representation of possible plant–microbe interactions favouring plant growth and/or biocontrol of phytopathogens by streptomycetes as rhizosphere competent microorganisms and/or endophytes (adapted from [ 57 ]). …”

Section: Figurementioning

confidence: 99%

Plant Growth Promoting and Biocontrol Activity of Streptomyces spp. as Endophytes

Vurukonda

Giovanardi

Stefani

2018

IJMS

481

252

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There has been many recent studies on the use of microbial antagonists to control diseases incited by soilborne and airborne plant pathogenic bacteria and fungi, in an attempt to replace existing methods of chemical control and avoid extensive use of fungicides, which often lead to resistance in plant pathogens. In agriculture, plant growth-promoting and biocontrol microorganisms have emerged as safe alternatives to chemical pesticides. Streptomyces spp. and their metabolites may have great potential as excellent agents for controlling various fungal and bacterial phytopathogens. Streptomycetes belong to the rhizosoil microbial communities and are efficient colonizers of plant tissues, from roots to the aerial parts. They are active producers of antibiotics and volatile organic compounds, both in soil and in planta, and this feature is helpful for identifying active antagonists of plant pathogens and can be used in several cropping systems as biocontrol agents. Additionally, their ability to promote plant growth has been demonstrated in a number of crops, thus inspiring the wide application of streptomycetes as biofertilizers to increase plant productivity. The present review highlights Streptomyces spp.-mediated functional traits, such as enhancement of plant growth and biocontrol of phytopathogens.

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Section: Figurementioning

confidence: 99%

Plant Growth Promoting and Biocontrol Activity of Streptomyces spp. as Endophytes

Vurukonda

Giovanardi

Stefani

2018

IJMS

481

252

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“…The results of this study showed that MDA, H 2 O 2 , soluble sugar content, and CAT activity was positively correlated with Saitozyma, Chloridium, and Boothiomyces, while negatively correlated with Acremonium and Cutaneotrichosporon (Figure 6B). Chloridium is an endophytic fungus that derives its support and nutrients from plant roots and, in turn, produces possible antimicrobial agents to protect plants from environmental threats (Vardharajula et al, 2017). Soil ammonium-nitrogen, chlorophyll content and APX activity were positively correlated with unclassified_Agaricomycetes, while negatively correlated with Candida.…”

Section: Effect Of Heat Stress On Soil Fungal Community and Its Assoc...mentioning

confidence: 99%

Changes and Correlation Between Physiological Characteristics of Rhododendron simsii and Soil Microbial Communities Under Heat Stress

et al. 2022

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The relationship between Rhododendron simsii and its soil microbial community under heat stress was not clear. In this study, the effects of heat stress on the physiological characteristics, soil physicochemical properties and soil microbial community structure of R. simsii were investigated. The experimental control (CK) was set as day/night (14/10 h) 25/20°C and experimental treatments were set as light heat stress (LHS) 35/30°C and high heat stress (HHS) 40/35°C. Our results showed that, compared with CK, LHS treatment significantly increased malondialdehyde, hydrogen peroxide, proline and soluble sugar contents, as well as catalase and peroxidase activities, while HHS treatment significantly increased ascorbate peroxidase activity and decreased chlorophyll content. Compared with CK, LHS treatment significantly reduced soil ammonium-nitrogen and nitrate-nitrogen content, while HHS significantly increased soil ammonium-nitrogen content. Compared with CK, both treatments changed the soil microbial community structure. For bacterial community, LHS and HHS treatment resulting in the significant enrichment of Burkholderia-Caballeronia-Paraburkholderia and Occallatibacte, respectively. For fungal community, LHS treatment resulting in the significant enrichment of Candida, Mortierella and Boothiomyces. The redundancy analysis showed that plant physiological characteristics, soil ammonium-nitrogen content were significantly correlated with the soil microbial community. Therefore, heat stress altered the soil microbial community structure, and affected the availability of soil available nitrogen, which in turn affected the physiological characteristics of R. simsii. We suggest that soil microbial community may play an important role in plant resistance to heat stress, and its mechanism deserves further study.

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“…In another study by Khamna et al [93], it is reported that in many medicinal plants IAA was produced by Streptomyces sp. [92].…”

Section: Production Of Plant Growth Hormone -Indole Acetic Acid (Iaa)...mentioning

confidence: 99%

“…Figure 1.Plant-endophytic actinomycetes interactions favoring plant growth and biocontrol of phytopathogens[92].…”

mentioning

confidence: 99%

Studies on Endophytic Actinobacteria as Plant Growth Promoters and Biocontrol Agents

Paul¹,

Chakraborty²

2022

Actinobacteria - Diversity, Applications and Medical Aspects

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The exploration of microbial resources is necessary for plant growth promotion, biological control, and reducing the agrochemicals and fertilizers for sustainable agriculture. Bacteria and fungi are distributed in the biosphere including the rhizosphere and help the host plants by alleviating biotic and abiotic stress through different mechanisms and can be used as bioinoculants for biocontrol and plant growth promotion. Actinobacteria are among the most abundant groups of soil microorganisms. They have been studied for their function in the biological control of plant pathogens, interactions with plants, and plant growth promotion. Streptomyces is the largest genus of actinobacteria. Streptomyces acts as both plant growth promoter and also as plant disease suppressor by various mechanisms like an increase in the supply of nutrients such as phosphorus, iron, production of IAA, and siderophore production. Endophytic actinobacteria help in plant growth-promoting through multiple ways by producing plant hormones; controlling fungal disease through antibiosis and competition. This review briefly summarizes the effects of actinobacteria on biocontrol, plant growth promotion, and association with plants as endophytes.

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Plant Growth Promoting Endophytes and their Interaction with Plants to Alleviate Abiotic Stress

Cited by 22 publications

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Plant Growth Promoting and Biocontrol Activity of Streptomyces spp. as Endophytes

Plant Growth Promoting and Biocontrol Activity of Streptomyces spp. as Endophytes

Changes and Correlation Between Physiological Characteristics of Rhododendron simsii and Soil Microbial Communities Under Heat Stress

Studies on Endophytic Actinobacteria as Plant Growth Promoters and Biocontrol Agents

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