Question

What role does glutamine play in amino acid metabolism of plants and how is it affected by light?

Answer 1

Ans. Glutamine play a critical role in plant nutrition and metabolism b. Glutamine may enter the plant cell through amino acid transporters and can serve as a critical nitrogen source for plant growth & development .

It helps in formation of vegetable tissue and chlorophyll synthesis. Helps to increase chlorophyll concentration in plant leading higher degree of photosynthesis .l

Glutamine also rapidly induced the expression of the DREB1A ,IRO2 and NAC5 transcription factor gene ,which are involved in the regulation of stress response.

LIGHT induces the expression of glutamine synthetase (GLN2) and represses expression of Asparagine to nearly undetectable level in light grown plant .low GLN2 mRNA from plants grown in dark and highly elivated in the light grown plant