The Role Proline Plays In Plant Growth and Tolerance to Abiotic Stress

Proline is an osmoprotectant widely distributed in animals, plants, fungi and algae. It accumulates due to various stress conditions such as drought, high salinity, high temperature, freezing, UV rays and heavy metals. This accumulation helps regulate osmotic balance and protect the plant’s cellular structure.

Research shows that increased proline content is associated with increased plant tolerance to environmental stress. However, the exact role of proline in plant development and the molecular mechanisms underlying its accumulation during stress responses are not fully understood. Understanding these mechanisms could open the door to using genetic engineering to improve crop stress resistance.

Proline can serve as an energy source for flowers, pollen, and other organisms because the oxidation of a single proline molecule can produce 30 ATP. The proline content in tobacco nectar can reach 2mmol/L, and bees prefer nectar with high proline content. This suggests that some plants may attract pollinating insects by producing proline-rich nectar.

Post time: Jun-17-2024