Effect of benzyl aminopurine and kinetin hormones on vegetative and reproductive growth of two Sri Lankan traditional rice varieties (oryza sativa l.); suwadal and kahata wee

Abstract

The study was carried out as a pot experiment in the green house condition to observe the effect of BAP and Kinetin on the growth and yield performances of Sri Lankan traditional Rice varieties (Oryza sativa L) Suwadal and Kahata wee. At the time of applying fertilizer applications to the plants, each pot was treated by 200 ml of BAP and Kinetin in different concentrations (0, 0.1, 0.3, 0.5 and 0.8 mgL-1) separately. Each pot was treated by one hormone; BAP or Kinetin throughout the experiment was over. Plant height in vegetative stage, number of tillers plant-1, number of panicles plant-1, number of seeds panicle-1 and weight of thousand seeds were measured. The experiment was conducted in a Complete Randomized Design (CRD) with 3 replications. The best vegetative growth and yield performances were observed in 0.3 mgL-1 BAP and 0.8 mgL-1 Kinetin in traditional rice varieties Kahata wee and Suwadal. The effect of BAP and Kinetin for two rice varieties was simillar in plant growth and development. Number of tillers plant-1 and thousand grain weight significantly increased in both varieties with hormones BAP or Kinetin whereas number of tillers plant-1 increased by 10-17% compared to control. Therefore it is possible; BAP or Kinetin (cytokinin) extracting plants could be integrated into rice ecosystem for better productivity.