Plant growth promoting traits of psychrotolerant bacteria: A boon for agriculture in hilly terrains

Patni, Babita; Panwar, Abhaya Shikhar; Negi, Priyanka; Joshi, Gopal Krishna

doi:10.14719/pst.2018.5.1.352

Cited by 14 publications

(6 citation statements)

References 10 publications

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“…They also include endophytes which share symbiotic relationship with their host plant to directly or indirectly promote its growth (22). Members of this phylum are also known for the production of auxin, indole-3-acetic acid (IAA), and other important phytohormones required for the growth and development of plants (23). The phylum Actinobacteria was the third most abundant group of bacteria found in soil treated with our green medium.…”

Section: Discussionmentioning

confidence: 99%

Bacterial community structure analysis of soil treated with Parthenium hysterophorus L. derived green medium

et al. 2020

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The present study encompasses the analysis of bacterial community structure of soil in the presence of Parthenium hysterophorus derived green medium. The 16S microbiome profiling of the soil revealed that it consists of members from 15 bacterial phyla with the most prominent being Proteobacteria. The other predominant phyla were Plantomycetes, Actinobacteria, Acidobacteria, Bacteroidetes, Chloroflexi and Firmicutes. The maximum proportion of the bacterial community remained unclassified at genus and species level. Among the classified population the maximum number of bacteria belonged to Flavisolibacter followed by Kaistobacter, Bacillus, Optitutus, Balneimonas, Steroidobacter, Rhodoplanes and Gemmata.

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Section: Discussionmentioning

confidence: 99%

Bacterial community structure analysis of soil treated with Parthenium hysterophorus L. derived green medium

et al. 2020

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“…Psychrophilic or psychrotolerant PGPR strains of bacteria secrete AFPs and they have ice nucleation activity, which helps in forming ice crystal outside of the bacterium, these properties of bacteria help to promote plant growth in agriculture under harsh cold temperature [331,332]. The arctic PGPR P. putida GR 12-2 secretes an AFP that increases its survival at subzero temperature.…”

Section: Pgpr Strains Produce Antifreeze Proteins (Afps)mentioning

confidence: 99%

PGPR‐mediated induction of systemic resistance and physiochemical alterations in plants against the pathogens: Current perspectives

et al. 2020

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Plant growth‐promoting rhizobacteria (PGPR) are diverse groups of plant‐associated microorganisms, which can reduce the severity or incidence of disease during antagonism among bacteria and soil‐borne pathogens, as well as by influencing a systemic resistance to elicit defense response in host plants. An amalgamation of various strains of PGPR has improved the efficacy by enhancing the systemic resistance opposed to various pathogens affecting the crop. Many PGPR used with seed treatment causes structural improvement of the cell wall and physiological/biochemical changes leading to the synthesis of proteins, peptides, and chemicals occupied in plant defense mechanisms. The major determinants of PGPR‐mediated induced systemic resistance (ISR) are lipopolysaccharides, lipopeptides, siderophores, pyocyanin, antibiotics 2,4‐diacetylphoroglucinol, the volatile 2,3‐butanediol, N‐alkylated benzylamine, and iron‐regulated compounds. Many PGPR inoculants have been commercialized and these inoculants consequently aid in the improvement of crop growth yield and provide effective reinforcement to the crop from disease, whereas other inoculants are used as biofertilizers for native as well as crops growing at diverse extreme habitat and exhibit multifunctional plant growth‐promoting attributes. A number of applications of PGPR formulation are needed to maintain the resistance levels in crop plants. Several microarray‐based studies have been done to identify the genes, which are associated with PGPR‐induced systemic resistance. Identification of these genes associated with ISR‐mediating disease suppression and biochemical changes in the crop plant is one of the essential steps in understanding the disease resistance mechanisms in crops. Therefore, in this review, we discuss the PGPR‐mediated innovative methods, focusing on the mode of action of compounds authorized that may be significant in the development contributing to enhance plant growth, disease resistance, and serve as an efficient bioinoculants for sustainable agriculture. The review also highlights current research progress in this field with a special emphasis on challenges, limitations, and their environmental and economic advantages.

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“…Notes have been made that use of cold-tolerant PGPR as inoculants, in particular for agricultural production in climate zones with low temperatures and a short growth season, can be attractive (Barka et al, 2006;Patni et al, 2018;Pandey and Yarzábal, 2019). Earlier attempts for using cold-adapted PGPR were initially restricted to Gram-negative bacteria, such as Burkholderia and Pseudomonas spp.…”

Section: Introductionmentioning

confidence: 99%

Cold‐adapted Bacilli isolated from the Qinghai–Tibetan Plateau are able to promote plant growth in extreme environments

Xie

et al. 2019

Environmental Microbiology

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Summary Nearly 1400 Bacillus strains growing in the plant rhizosphere were sampled from different sites on the Qinghai–Tibetan Plateau. Forty‐five of the isolates, selected due to their biocontrol activity, were genome‐sequenced and their taxonomic identification revealed that they were representatives of the Bacillus subtilis species complex (20) and the Bacillus cereus group (9). Majority of the remaining strains were found closely related to Bacillus pumilus, but their average nucleotide identity based on BLAST and electronic DNA/DNA hybridization values excluded closer taxonomic identification. A total of 45 different gene clusters involved in synthesis of secondary metabolites were detected by mining the genomes of the 45 selected strains. Except eight mesophilic strains, the 37 remaining strains were found either cold‐adapted or psychrophilic, able to propagate at 10°C and below (Bacillus wiedmannii NMSL88 and Bacillus sp. RJGP41). Pot experiments performed at 10°C with winter wheat seedlings revealed that cold‐adapted representatives of B. pumilus, B. safensis and B. atrophaeus promoted growth of the seedlings under cold conditions, suggesting that these bacilli isolated from a cold environment are promising candidates for developing of bioformulations useful for application in sustainable agriculture under environmental conditions unfavourable for the mesophilic bacteria presently in use.

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Plant growth promoting traits of psychrotolerant bacteria: A boon for agriculture in hilly terrains

Cited by 14 publications

References 10 publications

Bacterial community structure analysis of soil treated with Parthenium hysterophorus L. derived green medium

Bacterial community structure analysis of soil treated with Parthenium hysterophorus L. derived green medium

PGPR‐mediated induction of systemic resistance and physiochemical alterations in plants against the pathogens: Current perspectives

Cold‐adapted Bacilli isolated from the Qinghai–Tibetan Plateau are able to promote plant growth in extreme environments

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