It also acts as a glutamate precursor under stress conditions; glutamate regulates growth and the plant’s response to changes in the environment. The catabolism of lysine produces polyamines, such as cadaverine, involved in the growth and development of plants. It enhances the synthesis of chlorophyll and, together with other amino acids (proline, glutamate and methionine) is essential for pollen germination and elongation of the pollen tube.