Soil Organic Matter and Microbial Role in Plant Productivity and Soil Fertility

Biswas, T. D.; Kole, S. C.

doi:10.1007/978-981-10-7380-9_10

Cited by 16 publications

(10 citation statements)

References 5 publications

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“…The number of bacterial cells per seed was approx. 10 8 CFU determined using serial dilution method [ 69 ]. The germination index was then calculated using the equation as described by Mondal et al [ 70 ].…”

Section: Methodsmentioning

confidence: 99%

Comparative genomics and physiological investigation supported safety, cold adaptation, efficient hydrolytic and plant growth-promoting potential of psychrotrophic Glutamicibacter arilaitensis LJH19, isolated from night-soil compost

et al. 2021

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Background Night-soil compost (NSC) has traditionally been conserving water and a source of organic manure in northwestern Himalaya. Lately, this traditional method is declining due to modernization, its unhygienic conditions, and social apprehensions. Reduction in the age-old traditional practice has led to excessive chemical fertilizers and water shortage in the eco-sensitive region. In the current study, a bacterium has been analyzed for its safety, cold-adaptation, efficient degradation, and plant growth-promoting (PGP) attributes for its possible application as a safe bioinoculant in psychrotrophic bacterial consortia for improved night-soil composting. Results Glutamicibacter arilaitensis LJH19, a psychrotrophic bacterium, was isolated from the NSC of Lahaul valley in northwestern Himalaya. The strain exhibited amylase (186.76 ± 19.28 U/mg), cellulase (21.85 ± 0.7 U/mg), and xylanase (11.31 ± 0.51 U/mg) activities at 10 °C. Possessing efficient hydrolytic activities at low-temperature garners the capability of efficient composting to LJH19. Additionally, the strain possessed multiple PGP traits such as indole acetic acid production (166.11 ± 5.7 μg/ml), siderophore production (85.72 ± 1.06% psu), and phosphate solubilization (44.76 ± 1.5 μg/ml). Enhanced germination index and germination rate of pea seeds under the LJH19 inoculation further supported the bacterium’s PGP potential. Whole-genome sequencing (3,602,821 bps) and genome mining endorsed the cold adaptation, degradation of polysaccharides, and PGP traits of LJH19. Biosynthetic gene clusters for type III polyketide synthase (PKS), terpene, and siderophore supplemented the endorsement of LJH19 as a potential PGP bacterium. Comparative genomics within the genus revealed 217 unique genes specific to hydrolytic and PGP activity. Conclusion The physiological and genomic evidence promotes LJH19 as a potentially safe bio-inoculant to formulate psychrotrophic bacterial consortia for accelerated degradation and improved night-soil compost.

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Section: Methodsmentioning

confidence: 99%

Comparative genomics and physiological investigation supported safety, cold adaptation, efficient hydrolytic and plant growth-promoting potential of psychrotrophic Glutamicibacter arilaitensis LJH19, isolated from night-soil compost

et al. 2021

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“…The living soil system, which provides several ecosystem services including nutrient cycling, water regulation and controlling pests and diseases (Sharma et al, 2010; Kumar et al, 2017), is of primary importance in sustainable agricultural production. Microorganisms are one of the originators of soil and play an important role in determining soil functions including decomposition of above- and below-ground plant material (Biswas & Kole, 2017). In addition, microbes provide an integrated measure of soil quality that cannot always be obtained from physical and chemical measures and/or analysis of higher organisms.…”

Section: Discussionmentioning

confidence: 99%

Change of soil microbial community under long-term fertilization in a reclaimed sandy agricultural ecosystem

Wang

Liu

Zhao

et al. 2019

PeerJ

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The importance of soil microbial flora in agro-ecosystems is well known, but there is limited understanding of the effects of long-term fertilization on soil microbial community succession in different farming management practices. Here, we report the responses of soil microbial community structure, abundance and activity to chemical (CF) and organic fertilization (OF) treatments in a sandy agricultural system of wheat-maize rotation over a 17-year period. Illumina MiSeq sequencing showed that the microbial community diversity and richness showed no significant changes in bacteria but decreased in fungi under both CF and OF treatments. The dominant species showing significant differences between fertilization regimes were Actinobacteria, Acidobacteria and Ascomycota at the phylum level, as well as some unclassified genera of other phyla at the genus level. As expected, soil organic matter content, nutrient element concentrations and bacterial abundance were enhanced by both types of fertilization, especially in OF, but fungal abundance was inhibited by OF. Redundancy analysis revealed that soil enzyme activities were closely related to both bacterial and fungal communities, and the soil nutrient, texture and pH value together determined the community structures. Bacterial abundance might be the primary driver of crop yield, and soil enzyme activities may reflect crop yield. Our results suggest a relatively permanent response of soil microbial communities to the long-term fertilization regimes in a reclaimed sandy agro-ecosystem from a mobile dune, and indicate that the appropriate dosage of chemical fertilizers is beneficial to sandy soil sustainability.

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“…During the process of decomposition, a large number of nutrients are released (Biswas and Kole, 2017). These nutrients are lost from agricultural systems due to leaching, surface runoff and eutrophication, eventually remaining unavailable for plant uptake (Adesemoye and Kloepper, 2009).…”

Section: Resultsmentioning

confidence: 99%

Investigation of a night soil compost psychrotrophic bacteriumGlutamicibacter arilaitensisLJH19 for its safety, efficient hydrolytic and plant growth-promoting potential

Borker

Thakur

Kumari

et al. 2020

Preprint

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Soil Organic Matter and Microbial Role in Plant Productivity and Soil Fertility

Cited by 16 publications

References 5 publications

Comparative genomics and physiological investigation supported safety, cold adaptation, efficient hydrolytic and plant growth-promoting potential of psychrotrophic Glutamicibacter arilaitensis LJH19, isolated from night-soil compost

Comparative genomics and physiological investigation supported safety, cold adaptation, efficient hydrolytic and plant growth-promoting potential of psychrotrophic Glutamicibacter arilaitensis LJH19, isolated from night-soil compost

Change of soil microbial community under long-term fertilization in a reclaimed sandy agricultural ecosystem

Investigation of a night soil compost psychrotrophic bacteriumGlutamicibacter arilaitensisLJH19 for its safety, efficient hydrolytic and plant growth-promoting potential

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