Improving longevity of carrot (Daucus carota L.) seeds using ultra dry storage condition
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Date
2022
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Punjab Agricultural University, Ludhiana
Abstract
The studies on ―Improving longevity of Carrot (Daucus carota L.) seeds using ultra dry storage conditions‖ were conducted at the Seed Physiology Laboratory, Office of Director (Seeds), Punjab Agricultural University, Ludhiana during 2020 and 2021. In the present investigation carrot seeds cv PC-161 were dried using different drying methods, then packed in aluminium foil packs and stored under ambient storage environment. Result showed that, silica gel drying achieved the lowest seed moisture content as compared to oven dry that had highest germination percentage and seed vigour up to 30 months of the storage period under ambient conditions. Study investigating optimum seed moisture content, packaging material and storage conditions revealed that, carrot seeds ultra-dried to 3% MC when packed in aluminium foil packs and stored in cold store, enhanced the seed longevity and recorded for lowest gain in moisture content, higher germination percentage and seed vigour. Whereas, the activity of antioxidant enzymes, α-amylase enzyme, lipid peroxidation and seed storage reserves were found least affected in ultra-dried seeds. Accelerated ageing test predicted that artificially aged carrot seeds (PC-161 and Punjab Black Beauty) for 4-5 days were equivalent to naturally aged seeds of 16 months under cold store and 12 months under ambient storage conditions, in terms germination percentage, germination rate, seedling length and seed vigour index. In carrot seeds stored for 16 months, seed proteins (30 - 70 kDa) and RNA integrity degraded with storage time and the lowest degradation of RNA and protein profile was observed in seeds dried with silica gel and stored in aluminium foil with 3% moisture content under cold storage conditions.
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Sushil Kumar (2022). Improving longevity of carrot (Daucus carota L.) seeds using ultra dry storage condition (Unpublished Ph.D. Dissertation). Punjab Agricultural University, Ludhiana, Punjab, India.