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Assessment of Natural Ageing Related Physio-Biochemical Changes in Onion Seed

1
Department of Vegetable Science, Punjab Agricultural University, Ferozepur Road, Ludhiana 141027, India
2
Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, Camino de Vera 14, 46022 Valencia, Spain
3
Department of Vegetable Science, CCS Haryana Agricultural University, Main Road, Hisar 125004, India
*
Author to whom correspondence should be addressed.
Agriculture 2019, 9(8), 163; https://doi.org/10.3390/agriculture9080163
Received: 24 June 2019 / Revised: 21 July 2019 / Accepted: 24 July 2019 / Published: 25 July 2019
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Abstract

This research was performed for a period of three years to determine the effect of natural seed ageing on different physiological and biochemical changes in three extensively cultivated onion cultivars in Northern India. Seed storage studies showed that germination percent, seed viability and other seed quality parameters decreased significantly with increasing storage time. The onion seed can be stored for a maximum period of one year under ambient conditions to maintain required germination percentage (>70%). Overall, Hisar Onion-4 stored better when compared to Hisar Onion-3 and Hisar-2. As the ageing progressed the seed antioxidants, namely superoxide dismutase (SOD), catalase (CAT), dehydrogenase (DHA) and peroxidase (POD) decreased significantly (p < 0.05) in all cultivars whereas, the electrical conductivity (EC) of seed leachates increased significantly. Under the field conditions, seedling establishment percent (SE) onion seed was positively correlated (R2 = 0.98; p < 0.05) with germination percent (GP). Overall, more than one year period of seed storage was associated with poor germination and seedling establishment potential in onion. View Full-Text
Keywords: ageing; antioxidants; germination; onion; seed storage ageing; antioxidants; germination; onion; seed storage
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Brar, N.S.; Kaushik, P.; Dudi, B.S. Assessment of Natural Ageing Related Physio-Biochemical Changes in Onion Seed. Agriculture 2019, 9, 163.

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