Can Fine-Root Non-Structural Carbohydrates Explain Seasonal Variations in the Respiration in Subalpine Forests?

ABSTRACT: Fine root respiration drives root growth and resource acquisition in cold, nutrient-poor ecosystems, yet its association with root phenology remains unclear. Non-structural carbohydrates (NSC), stored as soluble sugars and starch are primary metabolites that play key roles in physiological functions. Analyzing NSC pools and availability contributes to the understanding of the seasonality of root respiration. Here, we examined seasonal variations in fine-root respiration, sugars and starch for Abies mariesii and Betula ermanii, from spring to autumn at 2000 and 2500 m in subalpine forests. Additionally, specific root length and root nitrogen concentrations were evaluated. Root respiration rates became higher, mostly following soil temperature. Sugar concentrations were the highest in spring

SUBMITTER: Hashimoto Y 

PROVIDER: S-EPMC12570781 | biostudies-literature | 2025 Nov-Dec

REPOSITORIES: biostudies-literature