热带亚热带植物学报2026，Vol.34Issue(3)：278-286,9.DOI:10.11926/jtsb.5021
角质层而非气孔调控木兰科植物叶片最小导度
Cuticle,but not Stomata,Regulates Minimum Leaf Conductance in Magnoliaceae
摘要
Abstract
To understand the response and adaptation mechanisms of forest plants to drought,the minimum leaf conductance(gmin)of 26 Magnoliaceae species(16 evergreen and 10 deciduous)in a common garden was measured.The results showed that the gmin of evergreen species[6.5 mmol/(m2ꞏs)]was significantly lower than that of deciduous species[11.6 mmol/(m2ꞏs)],and gmin was generally significantly negatively correlated with leaf cuticle thickness,but not significantly correlated with stomatal size,density,and stomatal index.The gmin decreased with the increase of mean annual temperature(MAT)of the species distribution area,but was not significantly correlated with mean annual precipitation(MAP).However,in evergreen species,the gmin decreased significantly with the decrease of MAP in distribution area,indicating that reducing gmin was an adaptation strategy to drought adopted by evergreen species(but not deciduous species).In addition,evergreen species had thicker cuticles,which explained the lower gmin.There was significant interspecific variability in gmin of Magnoliaceae species,and it was mainly regulated by cuticle characteristics rather than stomatal characteristics.These would provide a new perspective for revealing the drought adaptation mechanisms of plants.关键词
叶片最小导度/干旱适应策略/角质层/气孔特征Key words
Minimum leaf conductance/Drought adaptation strategy/Cuticle/Stomatal trait引用本文复制引用
杜莉,张天海,廖良宁,陈新兰,刘慧,秦新生,梁星云..角质层而非气孔调控木兰科植物叶片最小导度[J].热带亚热带植物学报,2026,34(3):278-286,9.基金项目
国家自然科学基金项目(32171503) （32171503）
广州市科技计划项目(2024A04J4347)资助 This work was supported by the National Natural Science Foundation of China(Grant No.32171503),and the Program for Science and Technology in Guangzhou(Grant No.2024A04J4347). （2024A04J4347）
