Assessment of seed vigour deterioration pattern based on physiological and biochemical attributes in Paddy (Oryza sativa L.) during storage Prakash Ajeet1*, Vijayakumar A.2, Chauhan P.3, Jha R.K.4 1Rajasthan State Seed and Organic Certification Agency, Suratgarh-335804, Rajasthan, (India) 2PGP College of Agricultural Science, Namakkal-637405, Tamil Nadu, (India) 3Seed Science & Technology, Teerthankar Mahaveer University, Moradabad-244001, Uttar Pradesh, (India) 4Seed Officer, RSSC, Sri Ganganagar-335001, Rajasthan, (India) * e-mail: ajeetprakash59@gmail.com
Online published on 5 January, 2021. Abstract Seven paddy cultivars viz., ‘ADT 38’, ‘ADT(R) 46’, ‘CO 43’, ‘CO(R) 50’, ‘CR 1009’, ‘IW Ponni’ and ‘Swarna’ were assessed for deterioration pattern during natural and artificial ageing. Various physiological and biochemical attributes associated with seed deterioration were studied in relation to seed vigour. Decline in dehydrogenase, α-amylase, catalase, peroxidase, superoxide dismutase activities and increase in electrical conductivity of seed leachate were observed during natural ageing. The deterioration during artificial ageing (40°C temperature and 100% relative humidity) followed the same pattern but with accelerated rate. The disintegration of embryo and aleurone layer was also conspicuous in accelerated aged seeds. These biochemical changes occurring during ageing are quite well reflected in terms of physiological attributes like loss of viability and vigour. Among the evaluated paddy cultivars, ‘CR 1009’ proved superior over all the other cultivars in maintaining higher viability and vigour potential while cv. ‘ADT 38’ and ‘ADT(R) 46’ showed poor storability. Top Keywords Ageing, Antioxidants, Germination, Seed vigour, Storability. Top |