Studies on Seed Biology, Pre-Sowing Treatment and Seed Storage in Impatiens talbotii Hook.
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Science, Dharwad
Abstract
The present investigation was carried out in the College of Forestry, Sirsi during 2015-16. Impatiens talbotii Hook. is a rare and endangered ephemeral restricted to northern part of Central Western Ghats, specifically Uttara Kannada and Shimoga District of Karnataka. Information on seed biology, seed dormancy and storability of seed hinders the conservation strategy of the species was scanty. Thus, efforts were made in this study for boosting conservation as well for domestication of rare plants in large scale.
Study found that capsule colour changed from pale green to dark green upon maturity, and 16.3 mm length, 8.43 mm width, 0.91 mm thickness, 0.31 g weight, volume of 10 capsule was 3.80 cm3, density of 10 capsule was 0.07 g/cc and number seeds per capsule were 8 in number. Similarly seed attributes such as seeds colour changed to dark brown upon maturity, seed length, width, thickness, volume of 50 seeds, density of 50 seeds and test weight of 100 seeds were 3 mm, 2.12 mm, 1.28 mm, 0.14 cm3, 1.04 g/cc and 0.69 g respectively.
Among all the pre-sowing treatments highest germination (93%), germination rate (8.56), peak value (0.23) and high seedling vigour was observed in scarification + GA3 @ 100 ppm for 6 hours soaking over the other treatments and produced high quality seedlings. There was no germination observed in control. Seeds stored at ambient relative humidity under cold storage showed higher germination of 83% and 58% at 30 and 180 days after storage respectively.
Combination of seed scarification and GA3 @ 100 ppm for 6 hours soaking treatment was best dormancy breaking treatment. Seed stored at ambient relative humidity under cold temperature (5 oC) was best storage condition to maintain the viability.