Physiological and biochemical attributes of rice (Oryza sativa L.) genotypes under complete submergence during the vegetative stage

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dc.contributor.advisorShatpathy, Prabhasmita
dc.contributor.authorDash, Pragyani
dc.date.accessioned2019-07-19T09:35:18Z
dc.date.available2019-07-19T09:35:18Z
dc.date.issued2019
dc.descriptionTh-5670en_US
dc.description.abstractof the Odisha University of Agriculture and Technology (OUAT), Bhubaneswar during kharif 2018 to study “Physiological and biochemical attributes of rice (Oryza sativa L.) genotypes under complete submergence during the vegetative stage”. Three rice genotypes (cv. Swarna, cv. Swarna sub 1 and cv. Binadhan 11), significantly showing different characteristics, were undertaken with four levels of complete submergence treatments (no submergence i.e. control, 4 and 8 days of submergence and reaeration for a day after 8 days of submergence) in factorial completely randomized design and that were replicated thrice. Seedlings at 30 DAS were subjected to submergence in a poly-pit to study the performance of rice genotypes under varying levels of complete submergence stress. Among the three test-genotypes of rice, cv. Swarna sub 1 showed the highest survival rate due to the least shoot elongation, highest tiller number and leaf area under 4 and 8 days of complete submergence in comparison to the control. It accumulated non-enzymatic anti-oxidants like carotenoid, proline over controlled condition. Higher carbohydrate, chlorophyll, and protein content were associated with submergence tolerant genotypes in comparison to the susceptible one (cv. Swarna). The antioxidant system of the plant to scavenge the ROS was almost at par in all three genotypes before submergence but increased significantly in tolerant ones under complete submergence. Elevated enzymatic antioxidant levels manifested the ability of cv. Swarna sub 1 to overcome oxidative stress through up-regulation of SOD, catalase, glutathione peroxidase activity under 8 days of complete submergence and subsequent reaeration. With regard to yield attributes, panicles per plant and grains per panicle were significantly the highest in cv. Swarna sub 1 and cv. Swarna recorded the least. The performance of cv. Swarna sub 1 followed by cv. Binadhan 11 and cv. Swarna were in diminishing mode under all four submergence treatments.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810115654
dc.keywordsPhysiological attribute, biochemical attribute, rice (Oryza sativa L.) ,genotypes,r complete submergence, vegetative stageen_US
dc.language.isoenen_US
dc.pages56en_US
dc.publisherOrissa University of Agriculture and Technology, Bhubaneswaren_US
dc.subPlant Physiologyen_US
dc.subjectnullen_US
dc.themePhysiological and biochemical attributesen_US
dc.these.typeM.Scen_US
dc.titlePhysiological and biochemical attributes of rice (Oryza sativa L.) genotypes under complete submergence during the vegetative stageen_US
dc.typeThesisen_US
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