Abstract
In order to evaluate ten sugarcane genotypes namely-CoS 07250, CoS 07240, CoS 08272, CoS 08279, CoS 09240, CoS 10239, CoSe 01434, CoSe 06455, CoSe 06456 and UP 05125 in relation to Anthocyanin accumulation, pot experiment was conducted in autumn season of 2011–2015, at the research farm of u.p Council of sugarcane research, Shahjahanpur (UP) India. The result of pooled data indicated that autumn planted young sugar plants accumulated anthocyanin pigment during winter season, which might have protected their photo system from adverse effects due to low temperature. Activity of nitrate reductase enzyme was higher during pre winter (November) which declined during the winter season (January). However, varieties CoS 07250, CoS 08279 and CoSe 01434 maintained higher activity of this enzyme throughout the formative phase of the crop. Total chlorophyll content in leaf followed the similar trend, being more during pre winter and declined in winter season with the increase of anthocyanin pigment. Crop growth rate (CGR) and Plastocrone were also higher in these varieties during the onset of summer. Thus greater accumulation of anthocyanin pigment in CoS 07250, CoS 08279 and CoSe 01434 during winter season resulted higher rate of metabolic activities to cope with low temperature stress.
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