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http://krishi.icar.gov.in/jspui/handle/123456789/44382
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Padhy, S.R., Bhattacharyya, P., Dash, P.K., Roy, K.S., Neogi, S., Baig, M.J., Swain, P., Nayak, A.K. and Mahapatra, T. | en_US |
dc.date.accessioned | 2021-01-01T10:52:17Z | - |
dc.date.available | 2021-01-01T10:52:17Z | - |
dc.date.issued | 2020-05-08 | - |
dc.identifier.citation | Padhy, S.R., Bhattacharyya, P., Dash, P.K., Roy, K.S., Neogi, S., Baig, M.J., Swain, P., Nayak, A.K. and Mahapatra, T., 2020. Enhanced labile carbon flow in soil-microbes-plant-atmospheric continuum in rice under elevated CO2 and temperature leads to positive climate change feed-back. Applied Soil Ecology, 155, p.103657. | en_US |
dc.identifier.issn | Not Available | - |
dc.identifier.uri | http://krishi.icar.gov.in/jspui/handle/123456789/44382 | - |
dc.description | Not Available | en_US |
dc.description.abstract | Lowland rice along with wetland sequesters one third of terrestrial carbon (C) which is responsible for both positive and negative feed-back to climate change. Labile C pools are sensitive to anticipated climate change condition (elevated CO2 and temperature). Those may eventually affect the C-stock in soil-microbes-plant-atmospheric (SMPA) continuum through priming effect and could enhance positive climate change feedback. Therefore, the objectives of the study were to analysis the effect elevated CO2 on C partitioning in rice-plant parts, soil labile C pools, and methane emission; along with identify related bacterial diversities and C-fixation pathways through whole genome metagenomic approach. The labile carbon flow in SMPA continuum was estimated for 3 years in lowland rice under elevated CO2 and temperature in open top chambers (OTCs). Rice was grown under ambient CO2 (a-CO2; 390 ± 20 μmol mol-1) and elevated CO2 and temperature (e-CO2T; 550 ± 20 μmol mol-1; 2 °C above ambient) under OTCs with replications. Soil labile C pools were increased by 25.4 to 38.9%, under e-CO2T over a-CO2. In microbes, biomass C, C-fixation pathways (metagenomic analysis) and C related soil enzymes were assayed. In atmosphere, the methane emission was measured and in plant system, C in different plant- parts, photosynthetic rates, root exudates-C were estimated to quantify labile C flow. Root exudates C was increased by 31.9% and microbial biomass C was enhanced by 23.3% under e-CO2T. Primarily, 12 soil bacterial genera which were responsible for C-fixation were dominant with higher abundance reads under e-CO2T. In C-fixation, dicarboxylate hydroxybutyrate cycle pathway and reductive citric acid cycle pathway were predominant under a-CO2 and e-CO2T, respectively. The methane emission was 26.0 and 26.8% higher under e-CO2T than a-CO2 at vegetative and reproductive stage of crop, respectively. Further, we got higher biomass accumulation, photosynthetic rate and stomatal conductance of rice under e-CO2T. Therefore, these augmented labile C flows in SMPA continuum may trigger the priming of soil C stocks, and at the same time could affect the system as a whole and results a positive feedback to climate change. | en_US |
dc.description.sponsorship | ICAR | en_US |
dc.language.iso | English | en_US |
dc.publisher | Elsevier | en_US |
dc.relation.ispartofseries | Not Available; | - |
dc.subject | Climate change feedback, Elevated CO2 and temperature, Microbial carbon fixation, Photosynthesis, Root exudates, Rice | en_US |
dc.title | Enhanced labile carbon flow in soil-microbes-plant-atmospheric continuum in rice under elevated CO2 and temperature leads to positive climate change feed-back | en_US |
dc.title.alternative | Not Available | en_US |
dc.type | Research Paper | en_US |
dc.publication.projectcode | Not Available | en_US |
dc.publication.journalname | Applied Soil Ecology | en_US |
dc.publication.volumeno | 155 | en_US |
dc.publication.pagenumber | 103657 | en_US |
dc.publication.divisionUnit | Crop Production Division | en_US |
dc.publication.sourceUrl | https://doi.org/10.1016/j.ecolind.2020.106431 | en_US |
dc.publication.authorAffiliation | ICAR::National Rice Research Institute | en_US |
dc.publication.authorAffiliation | Department of Environmental Science, SRM University, Delhi-NCR, Sonepat, Haryana, India | en_US |
dc.publication.authorAffiliation | Ashoka Trust for Research in Ecology and the Environment (ATREE), Bangalore-560064, Karnataka, India | en_US |
dc.publication.authorAffiliation | Indian Council of Agricultural Research, New Delhi, India | en_US |
dc.ICARdataUseLicence | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf | en_US |
dc.publication.naasrating | 9.19 | en_US |
Appears in Collections: | CS-NRRI-Publication |
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