Biotechnological perspectives of microbes in agro-ecosystems

Choudhary, Devendra Kumar; Sharma, Kanti Prakash; Gaur, Rajarshi Kumar

doi:10.1007/s10529-011-0662-0

Cited by 108 publications

(48 citation statements)

References 38 publications

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“…The ecological consequences of such transitions have been addressed in several studies focusing on land degradation [1,2,3], losses of macrobiodiversity [4,5], nutrient exhaustion in soils [3], sustainability [6,7] and restoration [8]. Soil microorganisms, including protozoa, fungi, bacteria and archaea, are essential for the proper functioning and sustainability of ecosystems [9,10,11]. Moreover, a high microbial diversity is assumed to be critical for the stability of ecosystems by providing functional diversity and redundancy [12,13].…”

Section: Introductionmentioning

confidence: 99%

- Discussion on Sustainable Water Technologies for Peri-Urban Areas of Mexico City: Balancing Urbanization and Environmental Conservation

2014

Agricultural Resource Use and Management

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Natural scrublands in semi-arid deserts are increasingly being converted into fields. This results in losses of characteristic flora and fauna, and may also affect microbial diversity. In the present study, the long-term effect (50 years) of such a transition on soil bacterial communities was explored at two sites typical of semi-arid deserts. Comparisons were made between soil samples from alfalfa fields and the adjacent scrublands by two complementary methods based on 16S rRNA gene fragments amplified from total community DNA. Denaturing gradient gel electrophoresis (DGGE) analyses revealed significant effects of the transition on community composition of Bacteria, Actinobacteria, Alpha-and Betaproteobacteria at both sites. PhyloChip hybridization analysis uncovered that the transition negatively affected taxa such as Acidobacteria, Chloroflexi, Acidimicrobiales, Rubrobacterales, Deltaproteobacteria and Clostridia, while Alpha-, Beta-and Gammaproteobacteria, Bacteroidetes and Actinobacteria increased in abundance. Redundancy analysis suggested that the community composition of phyla responding to agricultural use (except for Spirochaetes) correlated with soil parameters that were significantly different between the agricultural and scrubland soil. The arable soils were lower in organic matter and phosphate concentration, and higher in salinity. The variation in the bacterial community composition was higher in soils from scrubland than from agriculture, as revealed by DGGE and PhyloChip analyses, suggesting reduced beta diversity due to agricultural practices. The long-term use for agriculture resulted in profound changes in the bacterial community and physicochemical characteristics of former scrublands, which may irreversibly affect the natural soil ecosystem.

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Section: Introductionmentioning

confidence: 99%

- Discussion on Sustainable Water Technologies for Peri-Urban Areas of Mexico City: Balancing Urbanization and Environmental Conservation

2014

Agricultural Resource Use and Management

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“…Sedangkan suplementasi PGPR dan pengurangan dosis pupuk NPK majemuk diantara perlakuan A2P2, A3P3 dan A4P4 tidak berbeda nyata. Namun ketiga perlakuan tersebut berbeda secara nyata dengan perlakuan A0P0, sebagaimana yang ditunjukkan pada Tabel PGPR mampu meningkatkan kemampuan tanaman dalam menyerap nutrisi dari rizosfer melalui proses fiksasi nitrogen dan pelarutan fosfat (Choudhary et al, 2011).…”

Section: Npk Majemuk Pada Kadar Klorofil Daununclassified

PENGARUH DOSIS PUPUK NPK MAJEMUK DAN PGPR (PLANT GROWTH PROMOTING RHIZOBACTERIA) TERHADAP BOBOT BASAH DAN KADAR KLOROFIL DAUN TANAMAN PAKCOY (Brassica rapa L.)

Rosyida¹,

Nugroho²

2017

Bioma

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Plant Growth Promoting Rhizobacteria (PGPR) is a group of beneficial soil microorganisms for soil fertility and crops. This study aims to show the effect of PGPR supplementation in the dose of NPK fertilizer on fresh weight and leaf chlorophyll content of pakchoy (Brassica rapa L.). There ere five treatment levels, consist of variation of NPK dosage and PGPR, namely: NPK 100% (A0P0), NPK 75% + PGPR 25% (A1P1), NPK 50% + PGPR 50% (A2P2), NPK 25% + PGPR 75% (A3P3), 100% PGPR (A4P4). Each treatment was repeated 5 times. The experimental design was Completely Randomized Design (RAL), the experimental results were analyzed by ANOVA (P <0.05), followed by Duncan test. Based on the experimental results, it was concluded that there was a significant effect of PGPR supplementation in the dose of NPK fertilizer on fresh weight and leaf chlorophyll content. The highest fresh weight was shown in the plant treated with NPK 25% + PGPR 75% (A3P3), while in the treated plants NPK 75% + PGPR 25% (A1P1) were able to accumulate the highest chlorophyll content among the other plant leaves.

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“…Functional biodiversity in agroecosystems is an ecological key to sustainable production, and microorganisms have a fundamental importance in this process 2,80 . Soils that are poor in microorganisms exhibit a higher demand on fertilizers and synthetic addiction of nutrients, which besides increasing production cost, may also increase the risk of contamination of nearby natural environments.…”

Section: Functional Genesmentioning

confidence: 99%

“…Molecular biology tools have become important to allow the identification of key species in ecosystems 2 , or even for the identification of microbial communities with specific functions. The functions realized by the microorganisms can be related to: the fixation of atmospheric nitrogen, decomposers of organic residues or pesticides residues, promote the cycling of nutrients, fight diseases in plants caused by pathogens present in the soil and produce bioactive compounds like vitamins, hormones and enzymes that stimulate the growing of the plants 3 .…”

Section: Introductionmentioning

confidence: 99%

Functional Genes of Microorganisms, Comprehending the Dynamics of Agricultural Ecosystems

Reali

Júnior

Meile

et al. 2017

Braz. arch. biol. technol.

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The microbial composition of different types,in ecosystems (including agro-ecosystems), has been investigated in a rapidly growing number of studies in the past few years. The importance of microorganisms, regarding the maintenance and stability of nutrients in agroecosystems, is a key to maintain the sustainability of a crop. Molecular tools to study microbial communities are possible through many methods such as RISA, DGGE, TGGE, clone libraries, T-RFLP, RAPD, SSCP and more recently NGS (Next-Generation Sequencing). DGGE is widely employed to characterize the diversity and the community dynamics of microorganisms in the environment

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Biotechnological perspectives of microbes in agro-ecosystems

Cited by 108 publications

References 38 publications

- Discussion on Sustainable Water Technologies for Peri-Urban Areas of Mexico City: Balancing Urbanization and Environmental Conservation

- Discussion on Sustainable Water Technologies for Peri-Urban Areas of Mexico City: Balancing Urbanization and Environmental Conservation

PENGARUH DOSIS PUPUK NPK MAJEMUK DAN PGPR (PLANT GROWTH PROMOTING RHIZOBACTERIA) TERHADAP BOBOT BASAH DAN KADAR KLOROFIL DAUN TANAMAN PAKCOY (Brassica rapa L.)

Functional Genes of Microorganisms, Comprehending the Dynamics of Agricultural Ecosystems

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