Abstract: Nitrogen(N)is one of the important nutrient elements for plants,participating in multiple processes of physiological metabolism in plants. In recent years,increasing studies have shown that N plays important roles in regulating the adaptation of plants to abiotic stresses such as drought,high temperature,salt stress,etc. The regulation of N nutrition in plant stress acclimation involved in the physiological processes of N uptake,allocation and assimilation. The protective function of photorespiration was also closely related to N metabolism in plants. The mechanisms that N improves the stress adaptability of plants were relation to the improvement of water conductance,regulation of stomatal closure,energy saving or enhanced thermal energy dissipation,increased osmotic regulation and antioxidative capacity,and maintenance of ionic equilibrium. The variation of N nutrition under stress conditions induced the pathways of signaling molecules phytohormone and reactive nitrogen and oxygen species(RNOS). However,further studies were required on the molecular mechanism that the interaction between plant N signaling and stress signaling in improving the stress-acclimation of plants.

Key words: Nitrogen allocation, Nitrogen assimilation, Stress acclimation, Signal transformation

CLC Number: 

• S143.1