PJB-2022-504
EFFECT OF DROUGHT STRESS ON ROOT ANATOMY AND LIPID PEROXIDATION OF TOLERANCE, MODERATE AND SENSITIVE RICE VARIETIES
VIOLITA VIOLITA
Abstract
Rice is an important crop in the world, especially in Asia. Rice productivity is influenced by biotic and abiotic factors. The main abiotic factor that limits rice production is drought caused by water deficits. In reality, each variety of rice has a different response to drought. We have identified 3 groups of rice varieties based on their resistance to drought stress. However, the mechanism of the rice variety to drought are not yet known. This research aim to describe the mechanism of rice to drought in anatomy and physiological effect. Three rice varieties (Harum, Situbagendit, and Rosna) were treatment in 20% PEG 8000 solution as a simulation of drought stress for three days. The anatomical and peroxidation lipid were observed as a responses to drought stress. The result showed that the highest lipid peroxidation occurs in Rosna varieties followed by Situbagendit and Harum. Changes in anatomical structure of root rice to drought occurred in all anatomical parameter (stele diameter, cortex thickness, and xylem diameter).
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