Precipitation Gradient Drives Divergent Relationship between Non-Structural Carbohydrates and Water Availability in Pinus tabulaeformis of Northern China

Seasonal non-structural carbohydrate (NSC) dynamics in different organs can indicate the strategies trees use to cope with water stress; however, these remain poorly understood along a large precipitation gradient. In this study, we hypothesized that correlation between availability and NSC concentrations might be strengthened by decreasing Pinus tabulaeformis Carr. forests temperate China. Our results show of soluble sugars were lower stems coarse roots, starch was higher branches early growing season at drier sites. Throughout season, increased sites, especially for leaves, remained stable wetter while relatively all The concentrations, mainly starch, decreased roots Trees have faster growth rate an earlier cessation active stem Interestingly, also found divergent relationship NSCs mean availability, stronger observed These pine arid semi-arid regions northern China exhibit physiological responses improving our understanding adaptive mechanisms limitations warmer climate.