Title: THE EFFECT OF TEMPERATURE ON BIOCHEMICAL ACTIVITIES OF EMBRYO AND SEEDLING OF GERMINATING RICE (Oryza Sativa L.) SEED
نویسنده
چکیده
Some biochemical activities in embryo or seedling of germinating rice (Oryza Sativa L.) seed were studied to explain the effects of suboptimum (20 C), optimum (30 C), and supraoptimum (40 C) temperatures on seed germination and seedling growth. It was observed that 40 C slightly speeded up seed germination but severely inhibited the growth of young seedlings, 30 C delayed germination compared to 40 C, but resulted in the highest seedling growth rate, and 20 C delayed seed germination the most and reduced seedling growth rate to the lowest. Biochemical activities, DNA, RNA and protein synthesis were traced by the incorporation of H-thymidine, H-uridine and S-methionine, respectively, and metabolic activities as quantified by enzymatic activities were determined at 16, 40, and 64 hours of
منابع مشابه
Genome-Wide Analysis of the Complex Transcriptional Networks of Rice Developing Seeds
BACKGROUND The development of rice (Oryza sativa) seed is closely associated with assimilates storage and plant yield, and is fine controlled by complex regulatory networks. Exhaustive transcriptome analysis of developing rice embryo and endosperm will help to characterize the genes possibly involved in the regulation of seed development and provide clues of yield and quality improvement. PRI...
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