EFFECT OF PLANT GROWTH REGULATORS ON GERMINATION IN TWO ONION VARIETIES

Abstract

An attempt has been made to study the effect of Presowing soaking treatments with GA, SA, BA and CCC on seed germination, seedling growth and vigour index of onion variety Local white and N-53. The germination percentage of onion variety Local white and N-53 was decreased in response to GA, SA and CCC, while, it is increased in response to 6BA, Methionine and Cysteine pretreatments. The root length showed slight induction in response to GA, 6BA and Methionine pretreatments. The shoot growth was stimulated in response to these chemical growth regulators in Local white variety and N-53 variety. The seedling biomass was considerably increased in N-53 and Local white onion variety due to presowing soaking treatments of GA, methionine and cysteine, while, in response to SA, 6BA, CCC pretreatments seedling biomass was slightly decreased.