南京林业大学学报（自然科学版）2026，Vol.50Issue(3)：257-263,7.DOI:10.12302/j.issn.1000-2006.202503029
不同竞争关系下高节竹叶片形态及非结构性碳水化合物的变化特征
Variations in leaf morphology and non-structural carbohydrates in Phyllostachys prominens under different competition relationships
摘要
Abstract
[Objective]This study clarifies how different competition relationships affect leaf functional traits in Phyllostachys prominens,and examines the variation and interdependence of leaf morphology,pigment content,and non-structural carbohydrates(NSCs),providing a scientific basis for mixed-forest management and bamboo stand cultivation.[Method]We examined three stand types:P.prominens-P.edulis mixed forest(PM),P.prominens-broadleaf-conifer mixed forest(PB),and pure P.prominens forest(PP).Leaf morphological traits,pigment content,and NSCs accumulation characteristics were analyzed under different competitive conditions.Principal component analysis and partial least squares structural equation modeling(PLS-SEM)were employed to explore the differential impacts of interspecific and intraspecific competition on growth strategies and adaptive mechanisms.[Result]The PM stand significantly promoted leaf expansion and biomass accumulation in P.prominens,resulting in greater leaf length,width,area,dry mass,and specific leaf area compared to the PP and PB stands(P＜0.05),whereas leaf thickness and dry matter content were significantly lower.Chlorophyll a,chlorophyll b,and total chlorophyll contents were significantly higher in the PM stand than those in the PP and PB stands(P＜0.05),while the PP stand exhibited a significantly higher chlorophyll a/b.Soluble sugar content and soluble sugar-to-starch mass ratio were significantly higher in the PM and PP stands than those in the PB stand(P＜0.05).Principal component analysis and partial least squares structural equation modeling indicated that different competition relationships influenced bamboo growth characteristics,which in turn regulated leaf morphology and significantly affected pigment synthesis and NSCs accumulation(P＜0.001).Notably,bamboo height was strongly positively correlated with leaf morphological traits,which in turn,exhibited significant positive effects on pigment contents and NSCs.[Conclusion]P.prominens adapts to competitive environments by modifying its leaf morphology and physiological traits.It employs a resource acquisition strategy to enhance growth,promoting leaf expansion and sugar accumulation when competing with P.edulis,while optimizing carbon allocation to improve stress tolerance and resource use efficiency in broadleaf-conifer forests and pure stands.关键词
高节竹/竞争关系/叶片形态/色素/非结构性碳水化合物(NSCs)Key words
Phyllostachys prominens/competition relationships/leaf morphology/pigments/non-structural carbohydrates(NSCs)分类
农业科技引用本文复制引用
叶生月,凡莉莉,陈双林,郭子武,李健..不同竞争关系下高节竹叶片形态及非结构性碳水化合物的变化特征[J].南京林业大学学报（自然科学版）,2026,50(3):257-263,7.基金项目
中央财政林业科技推广示范资金项目[(2023)TS07号]. （2023）
