Intervarietal differences in some metabolic functions associated with protein accumulation in rice grains

✍ Scribed by R. Mitra; P. Narahari; T. Gopalakrishna; C. R. Bhatia

• Publisher: Springer
• Year: 1976
• Tongue: English
• Weight: 590 KB
• Volume: 48
• Category: Article
• ISSN: 0040-5752
• DOI: 10.1007/bf00281657

✦ Synopsis

Total nitrogen, amino nitrogen, glutamic acid dehydrogenase (GDH) activity and incorporation of (3)H-uridine and (14)C-amino acids into RNA and proteins, respectively, were compared in the developing grains of three high-protein stocks (IR-480-5-9, GMPR-51 and Erythroceros) and a high-yielding, medium-protein cultivar IR-8. The above parameters were also independently studied in the developing grains of IR-8 grown at 0, 60 and 120 kgN/ha. In addition, mobilization of nitrogen from flag leaf during kernel development was compared in a separate experiment. Higher protein concentration, both in high-protein stocks and in IR-8 grown at 120 kgN/ha, was associated with increased levels of: soluble amino nitrogen, GDH activity, (3)H-uridine and (14)C-amino acid incorporation. Significant variation was found among the high protein stocks in mobilization of nitrogen from flag leaf.