21/05/2026
🌱 L-Proline is a key protective substance naturally accumulated by plants in response to environmental stresses such as drought and high salinity. The core effects of exogenous application (i.e., artificial spraying or drenching) of L-Proline on plants can be summarized as follows:
🍇 Enhances Stress Tolerance (Primary Effect): As an osmotic regulatory substance, it helps plants maintain cellular water content under stresses such as drought, high salinity, and low temperature, stabilizes enzyme and protein structures, and scavenges excess reactive oxygen species to alleviate oxidative damage.
🍉 Activates Defense Responses: When attacked by pathogens, proline rapidly accumulates around the infection sites and participates in initiating the plant's hypersensitive response, thereby resisting diseases.
🍊 Regulates Growth and Development: Under normal conditions, proline also participates in regulating plant flowering, pollen fertility, and the development of embryos and leaves.
🥝 Aids Biological Nitrogen Fixation: In leguminous plants such as soybean, proline application can enhance the nitrogenase activity of rhizobia, promoting the conversion of atmospheric nitrogen into plant-available nutrients within the root nodules.
