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Nitrogen Metabolising Enzymes and Photosynthetic Pigments as Influenced by Nitrogen Application in Oilseed Rape(Brassica napus L.)

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Journal of Agricultural Science and Technology(B) 2021年第3期11卷 95-108页

作者： Nimrat Kaur Gill Pushp Sharma Virender Sardana Department of Plant Breeding and Genetics Punjab Agricultural UniversityLudhianaPunjab 141004India Department of Botany Punjab Agricultural UniversityLudhianaPunjab 141004India

Nitrogen(N)assimilation is a wide pathway in plants because of its fundamental importance for growth and *** transport,assimilation and recycling of nitrogen is a highly complex and regulated process,as it is the mineral nutrient that is required in great abundance by the *** approach to enhance agriculture sustainability is dependent on exploration of the elite germplasm where new cultivars could perform better even under low *** test the effect of nitrogen levels at 100 and 125 kg ha-1 on photosynthetic pigments and N assimilation in oilseed rape(*** L.)canola variety GSC-7 and hybrid Hyola PAC 401 were selected for comparison with new hybrid PGSH-52 in pipeline.N assimilating enzymes were assayed at vegetative,flowering and siliquing stages of crop growth to visualise the impact of N on the *** assimilating enzymes were highest at flowering stage and enhanced with increased N *** reductase(NR)activity improved by 11.5%,nitrite reductase(NiR)by 24.2%,glutamine synthetase(GS)by 12.2%and glutamate synthase(GOGAT)by 35.2%over recommended N dose(N100)at flowering *** PAC 401 registered maximum enzymatic activities trailed by GSC-7 at all the three stages of crop *** existed within the genotypes for photosynthetic pigments which varied with N *** a,chlorophyll b,total chlorophyll and carotenoids increased with nitrogen at 125 kg N ha^(-1)whereas chlorophyll a/b declined at three stages of crop *** flowering total chlorophyll and carotenoids were maximum and enhanced by 12.8%and 5%respectively with higher nitrogen level.

关键词： B.napus nitrogen biochemical estimations photosynthetic pigments

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