Latest Issue
ISSN : 2456-8643

Title:
WATER STRESS AFFECTS GROWTH, BIOMASS PARTITIONING, GRAIN FILLING AND PRODUCTIVITY OF MR219, A HIGH YIELDING RICE VARIETY OF MALAYSIA

Authors:
Zulkarami Berahim , Deivaseeno Dorairaj , Halimi Mohd Saud , Mohamad Husni Omar , Nazmin Yaapar , Mohd Razi Ismai

Abstract:
Oryza sativa, rice is the major staple food for half the human population especially Asians. However, the crop which belongs to the grass family is highly susceptible to drought which causes huge yield losses in the areas of cultivation. This condition affects physiological and biochemical processes in rice plant which in turn impacts its productivity. Grain filling which is the most important determinant of yield is affected if water stress were to occur during the booting stage. The effect of different water regimes (well watered and water stressed) on the high yielding rice variety, MR219 was investigated both under rain shelter and field condition. The objectives of this study were to evaluate the growth, physiological processes, yield and biomass partitioning of rice plants subjected to water stress. Biomass partitioning, harvest index and photosynthesis were reduced by 50% under water stress due inefficient translocation of assimilates. Results from the field study pointed to yield losses that ranged from 60 to 90% under drought condition as compared to control

PDF Download