草原植物碳水化合物对环境胁迫的响应研究进展

arbohydrates play a significant role in grass’s life: they provide energy for plant growth and participate in many kinds of metabolic reactions. Enough carbohydrates stored in grass roots are necessary for plant re-growth and tolerances to environmental stresses, as well as maintaining the stability of perennial grassland ecosystem. However, most researches focused on plant aboveground organs, such as leaves, and few studies concentrate on the relationship of components of soluble carbohydrates with root biological functions. Land use change and the different kinds of stress have profound effects on root carbohydrates. Generally, grazing reduced roots carbohydrates to compensate for the loss of aboveground biomass, nitrogen supply decrease root carbohydrates for new aboveground biomass formation, and salinity stress caused the accumulation of carbohydrates in plants to osmotic adjustment. In research methods, we strongly suggest rapid freeze-drying and high performance liquid chromatography (HPLC) to be used to analyze different soluble sugar components. Future research can be done to explore the relationship of different soluble sugar components with root bio-ecological functions.