DefinePK

Abstract

Drought stress would be impact to plant growth, one of them its the physiological aspects of the plant. The plant’s physiological response to drought stress may vary by genotipe. This study aims to determine the physiological response of several local paddy genotypes from Kampar on drought conditions induced by polyethylene glycol. This research has been conducted in Genetics and Breeding Laboratory as well as in plastic house of Faculty of Agriculture and Animal Science State Islamic University of Sultan Syarif Kasim Riau. This research used a Completely Randomized Design Factorial with 3 replications. The first factor is 10 local paddy genotypes from Kampar namely: Kuniong, Buyuong, Arofah, Darman, Tolulawuok, Buyuong Putioh, Kuniong Tinggi, Sirok, Owun and Gadin. The second factor is two levels of concentration of Polyethylene Glycol (PEG) solution, namely: 0% and 20%. The observed variables were: chlorophyll a concentration, chlorophyll b concentration, total chlorophyll concentration, stomata count and Relative Water Content (RWC). The results of this study indicate that the Kuniong genotype can keep RWC high. Administration of PEG concentration of 0% and 20% had an effect on all parameters except on chlorophyll a and total chlorophyll parameters. Interaction between Buyuong genotype and 20% PEG concentration showed paddy plants that could adapt to drought stress conditions.