Research progress on the hydraulic structure characteristics of xerophytes

doi:10.11686/cyxb2023367

Abstract

Abstract:

The survival of xerophytes is mainly dependent on water conditions. The responses and adaptation strategies of plants to drought stress and rehydration determine their growth and distribution characteristics. The hydraulic structure of plants is a complex hydraulic connection system that forms during plant growth. It reflects the water supply strategy formed in the Soil-Plant-Atmosphere Continuum （SPAC） circulation process of water uptake by roots， water transport via the xylem， and water lost by transpiration. It is the key internal factor determining the drought resistance of plants， and is also the focus of research on plant-water relationships. In this study， we reviewed recent research on the characteristics of plant hydraulic structure. The results of recent studies have revealed the coordination and trade-off mechanisms of plant hydraulic characteristics， and clarified the coupling relationship between hydraulic and economic traits. This review discusses the shortcomings in plant supply-demand hydraulics model simulations and the evaluation systems used to evaluate plant drought resistance and rehydration resilience. From the perspective of hydraulic structure， we discuss the existing problems in research on plant drought resistance and adaptation mechanisms， and propose key points for future research. Studies addressing these key problems will provide a theoretical basis and supporting data for vegetation restoration and reconstruction in arid conditions.

Key words: hydraulic characteristics, economic traits, model simulation, evaluation system

Yan-xia PAN, Hao XU, Ya-feng ZHANG, Hong-xia ZHANG. Research progress on the hydraulic structure characteristics of xerophytes[J]. Acta Prataculturae Sinica, 2024, 33(8): 190-198.

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