Abstract
The effects of fruit after-ripening, seed extraction procedures and period of seed storage on dormancy, vigour index and seed viability of colocynth were studied under controlled conditions at Jaisalmer (India) during 2006–2007. The state of dormancy was assessed by determining the germination of seed and viability by assaying the activity of dehydrogenase. After-ripening of fruits for 3 months, did not affect 100-seed weight indicating that seeds achieved physiological maturity before harvest of fruits. Seed germination, vigour index and seed viability decreased with duration of fruit after-ripening and highest values of seed quality parameters were recorded from the seeds of fresh fruits. Seeds extracted by fermenting fruits for 48 h, recorded significantly higher seed germination and vigour index. Dehydrogenase activity was recorded significantly higher with 2 % HCl method of seed extraction. Storing of fresh seeds up to 12 month decreased seed germination from 73 to 16 %, vigour index from 2,696 to 488 and dehydrogenase activity from 0.820 to 0.628 OD.
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Mahajan, S.S., Kumawat, R.N. Study of Seed Dormancy in Colocynth (Citrullus colocynthis L.) with After-Ripening of Fruits, Seed Extraction Procedures and Period of Seed Storage. Natl. Acad. Sci. Lett. 36, 373–378 (2013). https://doi.org/10.1007/s40009-013-0146-y
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DOI: https://doi.org/10.1007/s40009-013-0146-y