Different amino acids have different physiological functions to crops, but they are synergistic. At present, there are few studies on the physiological functions of amino acids in plants in China. The following content is compiled based on some domestic and foreign documents and materials, and is for reference only.
Alanine: It increases the synthesis of chlorophyll, regulates the opening of stomata, and has a defensive effect on germs.
Arginine: enhances root development, is the precursor of plant endogenous hormone polyamine synthesis, and improves crop resistance to salt stress.
Aspartic acid: Improve seed germination, protein synthesis, and provide nitrogen for growth during stressful periods.
Cysteine: Contains sulfur that is an amino acid that maintains cell function and acts as an antioxidant.
Glutamic acid: Reduce nitrate content in crops; increase seed germination, promote leaf photosynthesis, and increase chlorophyll biosynthesis.
Glycine: has a unique effect on the photosynthesis of crops, is beneficial to crop growth, increases the sugar content of crops, and is a natural metal chelator.
Histidine: It regulates the opening of stomata and provides the precursor of carbon skeleton hormone, the catalytic enzyme for cytokinin synthesis.
Isoleucine and Leucine: Improve resistance to salt stress, improve pollen vigor and germination, and aromatic precursor substances.
Lysine: Enhance chlorophyll synthesis and increase drought tolerance.
Methionine: The precursor for the synthesis of plant endogenous hormones ethylene and polyamines.
Phenylalanine: Promote the synthesis of lignin, the precursor substance of anthocyanin synthesis.
Proline: Increase plant tolerance to osmotic stress, improve plant resistance and pollen vigor.
Serine: Participate in cell tissue differentiation and promote germination.
Threonine: Improve tolerance and insect pests and diseases, and improve the process of humification.
Tryptophan: The precursor of the endogenous hormone auxin indole acetic acid synthesis, which improves the synthesis of aromatic compounds.
Tyrosine: Increase drought tolerance and improve pollen germination.
Valine: Increase seed germination rate and improve crop flavor.
The above is a brief introduction about the role of amino acids in plant growth. If the detailed content may require a very thick book to be comprehensive, there is no such book yet. Understand the role of amino acids, and based on these characteristics, can they be developed and applied in a targeted manner, and can better play the function of amino acid biostimulants.