Impact of carbon and nitrogen metabolism on grain filling in quinoa

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dc.contributor.advisorGrewal, Satvir Kaur
dc.contributor.authorSonali
dc.date.accessioned2022-12-04T06:03:03Z
dc.date.available2022-12-04T06:03:03Z
dc.date.issued2021
dc.description.abstractThe present investigation was carried out to study the impact of carbon and nitrogen metabolism in quinoa genotypes IC411824, IC411825, EC507747 and EC507742 during pre anthesis, anthesis and post anthesis period at different days after sowing (DAS). It was observed that activities of acid invertase, sucrose synthase (cleavage) and sucrose phosphate synthase (SPS) increased up to 75 DAS and this might be responsible for providing reducing sugars for the development of vegetative parts. Increased activities of acid invertase, sucrose synthase (cleavage) and sucrose phosphate synthase from 75 to 90 DAS of inflorescence in quinoa genotypes might be responsible for the assimilation of carbohydrates needed for the development of seeds during post-anthesis period. The activities of acid invertase and sucrose synthase (cleavage) were observed to be maximum in seeds of quinoa genotypes at 110 DAS and decreased with the progression of seed development and were found to be minimum near seed maturity at 124 DAS. Enhanced activities of nitrate reductase, glutamate synthase, glutamine synthtase during vegetative growth of leaves and stem at 90 DAS assists the fixation of ammonia on glutamate molecule to synthesize amino acids at early stages. However, the glutamate dehydrogenase and nitrite reductase had significant role in the re- assimilation of amides from the amino group of asparginase at 90 DAS of inflorescence and 124 DAS of seed maturity. Photosynthetic products like glucose and sucrose provide both the energy and the C-skeletons for ammonium assimilation during amino acid biosynthesis. Carbohydrate composition, free radical scavenging activity and phenolics were observed to be maximum during post anthesis period of seed development in quinoa genotypes.en_US
dc.identifier.citationSonali (2021). Impact of carbon and nitrogen metabolism on grain filling in quinoa (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810190328
dc.keywordsCarbon metabolism, carbohydrate composition, quinoa, nitrogen metabolism, saponinen_US
dc.language.isoEnglishen_US
dc.pages94en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemImpact of carbon and nitrogen metabolism on grain filling in quinoaen_US
dc.subBiochemistryen_US
dc.themeImpact of carbon and nitrogen metabolism on grain filling in quinoaen_US
dc.these.typeM.Scen_US
dc.titleImpact of carbon and nitrogen metabolism on grain filling in quinoaen_US
dc.typeThesisen_US
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