2.6.1.2 metabolism the enzyme is essential for the alanine metabolism in tea plants 759663 2.6.1.2 physiological function an AlaAT1 mutant has less amylose and its amylopectinis structurally altered. Expression of the starchsynthesis genes AGPases, SSI, SSIIa, and PPDKB is decreased in the mutant 739368 2.6.1.2 physiological function homozygous Qsd1 RNAi knockdown plants show less than 5% germination after 21 days at 21°C, while heterozygous plants show intermediate levels of about 40% germination, compared with 80-90% for wild-type 739150 2.6.1.2 physiological function RNAi knockdown of the enzyme has no effect on phenotype 738918 2.6.1.2 physiological function transgenic tobacco lines expressing synthetic alanine aminotransferase show improvement in nitrogen uptake, total free amino acid, crude proteins, enzyme activity, leaf area, stalk diameter, above the ground fresh mass, above ground dry matter and seed weight per plant which demonstrates improved nitrogen uptake and its incorporation into biomass as compared to the wild type 759337