Bacterial endophytes of rice (Oryza sativa L.) and their potential for plant growth promotion and antagonistic activities

Kumar, Vinay; Jain, Lata; Jain, Sanjay Kumar; Chaturvedi, Sameer; Kaushal, Pankaj

doi:10.1016/j.sajb.2020.02.017

Cited by 70 publications

(33 citation statements)

References 57 publications

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“…The identified strain T4S potentially produces lytic enzymes, IAA, siderophores, and also, displayed the ability to solubilize phosphate. To corroborate this, research findings into plant growth-promoting activities of endophytic bacteria colonizing the root endosphere of sunflower based on their multifunctional traits could functionally ensure better crop yields [ 26 ].…”

Section: Discussionmentioning

confidence: 99%

Genomic Analysis of Endophytic Bacillus cereus T4S and Its Plant Growth-Promoting Traits

Adeleke

Babalola

2021

Plants

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Insights into plant endophytic microbes and their exploration in agriculture have provided opportunities for sustainable plant health and food safety. Notable endophytic Bacillus species with plant growth-promoting traits have been documented; nevertheless, information on genome analysis of B. cereus associated with the sunflower in South Africa has not been studied. Therefore, we present whole-genome sequence of agriculturally important B. cereus strain T4S isolated from sunflower plants. The NextSeq Illumina sequencing yielded 7,255,762 bp sequence reads, 151 bp average read length, 5,945,881 bp genome size, 56 tRNA, 63 rRNA, and G + C content of 34.8%. The phylogeny analysis of strain T4S was similar to B. cereus NJ-W. Secondary metabolites, such as petrobactin, bacillibactin, bacitracin, molybdenum factor, zwittermicin, and fengycin underlining bacterial biocontrol efficacy against phytopathogens were found in the T4S genome. The predicted novel genes in the bacterial genome mediating the complex metabolic pathways can provide a genetic basis in understanding endosphere biology and their multiple functions thereof in crop improvement. Interestingly, seed and root inoculation with strain T4S contributed to sunflower yield under greenhouse experiments. Hence, the detection of notable genes specific for plant growth promotion as validated under in vitro screening, promisingly, suggests the relevance of strain T4S in agricultural biotechnology.

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Section: Discussionmentioning

confidence: 99%

Genomic Analysis of Endophytic Bacillus cereus T4S and Its Plant Growth-Promoting Traits

Adeleke

Babalola

2021

Plants

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“…Hydrocyanic acid, a volatile metabolite produced by various microbes, is well known for its role against various pathogens and thus plays a vital role in the biological control of phytopathogenesis [66]. Bacterial endophytes capable of producing hydrocyanic acid have been widely reported by many researchers [67].…”

Section: Discussionmentioning

confidence: 99%

Bacterial Endophyte Community Dynamics in Apple (Malus domestica Borkh.) Germplasm and Their Evaluation for Scab Management Strategies

Padder

Mansoor

Bhat

et al. 2021

JoF

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The large genetic evolution due to the sexual reproduction-mediated gene assortments and propensities has made Venturia inaequalis (causing apple scab) unique with respect to its management strategies. The resistance in apple germplasm against the scab, being controlled for by more than fifteen genes, has limited gene alteration-based investigations. Therefore, a biological approach of bacterial endophyte community dynamics was envisioned across the apple germplasm in context to the fungistatic behavior against V. inaequalis. A total of 155 colonies of bacterial endophytes were isolated from various plant parts of the apple, comprising 19 varieties, and after screening for antifungal behavior followed by morphological, ARDRA, and sequence analysis, a total of 71 isolates were selected for this study. The alpha diversity indices were seen to fluctuate greatly among the isolation samples in context to microflora with antifungal behavior. As all the isolates were screened for the presence of various metabolites and some relevant genes that directly or indirectly influence the fungistatic behavior of the isolated microflora, a huge variation among the isolated microflora was observed. The outstanding isolates showing highest percentage growth inhibition of V. inaequalis were exploited to raise a bio-formulation, which was tested against the scab prevalence in eight apple varieties under controlled growth conditions. The formulation at all the concentrations caused considerable reductions in both the disease severity and disease incidence in all the tested apple varieties. Red Delicious being most important cultivar of the northwestern Himalayas was further investigated for its biochemical behavior in formulation and the investigation revealed different levels of enzyme production, chlorophyll, and sugars against the non-inoculated control.

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“…It is suggested that Enterobacter functions in three different ways: (i) synthesizing particular compounds for the plants, (ii) facilitating the uptake of certain nutrients from the soil, and (iii) lessening or preventing the plants from diseases. These can be characterized by the determination of antagonistic and plant growth-promoting activities [ 147 ].…”

Section: The Pgpb As Biocontrol Agentmentioning

confidence: 99%

Plant Growth-Promoting Bacteria as an Emerging Tool to Manage Bacterial Rice Pathogens

et al. 2021

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As a major food crop, rice (Oryza sativa) is produced and consumed by nearly 90% of the population in Asia with less than 9% produced outside Asia. Hence, reports on large scale grain losses were alarming and resulted in a heightened awareness on the importance of rice plants’ health and increased interest against phytopathogens in rice. To serve this interest, this review will provide a summary on bacterial rice pathogens, which can potentially be controlled by plant growth-promoting bacteria (PGPB). Additionally, this review highlights PGPB-mediated functional traits, including biocontrol of bacterial rice pathogens and enhancement of rice plant’s growth. Currently, a plethora of recent studies address the use of PGPB to combat bacterial rice pathogens in an attempt to replace existing methods of chemical fertilizers and pesticides that often lead to environmental pollutions. As a tool to combat bacterial rice pathogens, PGPB presented itself as a promising alternative in improving rice plants’ health and simultaneously controlling bacterial rice pathogens in vitro and in the field/greenhouse studies. PGPB, such as Bacillus, Pseudomonas, Enterobacter, Streptomyces, are now very well-known. Applications of PGPB as bioformulations are found to be effective in improving rice productivity and provide an eco-friendly alternative to agroecosystems.

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Bacterial endophytes of rice (Oryza sativa L.) and their potential for plant growth promotion and antagonistic activities

Cited by 70 publications

References 57 publications

Genomic Analysis of Endophytic Bacillus cereus T4S and Its Plant Growth-Promoting Traits

Genomic Analysis of Endophytic Bacillus cereus T4S and Its Plant Growth-Promoting Traits

Bacterial Endophyte Community Dynamics in Apple (Malus domestica Borkh.) Germplasm and Their Evaluation for Scab Management Strategies

Plant Growth-Promoting Bacteria as an Emerging Tool to Manage Bacterial Rice Pathogens

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