1lt-ksh1400
CROP NUTRITION
Methionine is also a fundamental metabolite in plant cells since through its first metabolite, S-adenosylmethionine (SAM), it controls the level of several key metabo- lites such as ethylene, polyamines, and biotin.
In plants, the aromatic amino acids phenylalanine, tyrosine, and tryptophan are not only essential components of protein synthesis, but are also located upstream of a number of growth hormones and secondary metabolites with multiple biological functions and health-promoting properties,