STUDIES ON SEED INVIGOURATION FOR ENHANCING PRE-SOWING QUALITIES AND SEEDLING TRAITS IN SWEET PEPPER (Capsicum annuum L.)
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2022-12-12
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An experiment was carried out to enhance the pre-sowing qualities and seedling traits of sweet pepper during 2021/22 at the Department of Seed Science and Technology, UAS, Bangalore. Initially, standardization was done for different temperature and soaking duration for invigouration treatment. Among treatment, seeds soaked for 16 hours at 30°C enhance the seedling quality viz., seed germination (93.0 %), mean seedling length (8.47 cm) and seedling vigour index – II (462). Further, the effect of different invigouration methods like halopriming, osmo priming, biopriming and nano priming were conducted. Among them, seed primed with KNO3 at 2 %, polyethylene glycol (PEG 8000) at -1.5 MPa, compost tea at 30 %, ZnO at 250 ppm with water soaking and ZnO at 250 ppm with polymer coating recorded the highest seed germination (87.0, 85.0, 84.0, 87.0 and 82.0 %), mean seedling length (9.84, 9.20, 8.65, 12.45 and 11.41 cm) and seedling vigour index – II (410, 377, 338, 420 and 348) respectively. Later, best treatments were selected to assess the seedling performance under portray method. Seed primed with KNO3 at 2 % showed highest seedling emergence (90.0 %) at 15 DAS and seedling recovery (91.0 %) at 30 DAS. Further, these treatments were also assessed for relative storability of invigourated seed through artificial ageing. Seeds primed with compost tea at 30 % recorded higher seed quality attributes like radicle emergence (40.0 %), seed germination (40.0 %), mean seedling length (9.73 cm) and seedling vigour index – II (165) even after three days ageing.
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