DefinePK

Abstract

ABSTRACT Seed of cassia fistula, an ornamental flowering tree, treated with concentrated sulphuric acid for 15 minutes and 30 minutes and then thoroughly washed and soaked in water for 24 hours before sowing, started germination the next day and gave, with in 5 days 84 and 90% germination, respectively. Soaking in acid for one hour, followed by 24 hours soaking in water gave 76% germination after 5 days. About 90% germination was obtained in 20 days with acid soaking for 15 and 30 minutes not followed by water soaking. Hot water soaking for 24 hours resulted in 26% germination in 5 days which increased to 36% in 20 days. Soaking seed in hydrogen peroxide for 15 minutes, 30minutes and one hour followed by soaking in water for 24 hours gave, in 5 days 7, 8 and 11% germination, respectively. When soaking in hydrogen peroxide was not followed by soaking in water, germination was delayed by 5 days. Control and cold water soaking for 24 hours gave only about 8% germination in 20 days.