东亚地区栓皮栎叶片表皮毛空间变异特征及其与气孔的协同关系  

Spatial variations in leaf trichomes and their coordination with stomata in Quercus variabilis across Eastern Asia

作　　者：Yanhua Zhu Ji Zheng Hongzhang Kang Nan Hui Shan Yin Zhicheng Chen Baoming Du Chunjiang Liu 

机构地区：[1]School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China [2]Instrumental Analysis Center,Shanghai Jiao Tong University,Shanghai 200240,China [3]School of Design,Shanghai Jiao Tong University,Shanghai 200240,China [4]Shanghai Urban Forest Ecosystem Research Station,State Forestry Administration,Shanghai 200240,China [5]Shanghai Yangtze River Delta Ecoenvironmental Change and Management Observation and Research Station,Ministry of Science and Technology,Shanghai 200240,China [6]Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Beijing 100091,China

出　　处：《Journal of Plant Ecology》2024年第3期153-161,共9页植物生态学报（英文版）

基　　金：the National Key Technology Research and Development Program of China(2021YFD2200405 to Z.C.);the National Natural Science Foundation of China(31270640and 31070532 to C.L.);the China Postdoctoral Science Foundation(2019M661489 to B.D.).

摘　　要：理解植物功能性状的地理变异对预测全球气候变化下的植物响应至关重要。叶片表皮毛由表皮细胞发育而来,具有调节叶片温度和控制气体交换的功能,然而大的地理尺度上叶片表皮毛如何变异,以及它们与气孔之间的关系仍不清楚。本研究以栓皮栎(Quercus variabilis)为研究对象,分析了东亚地区44个种群叶片表皮毛密度,并评估了它们与气候因子和气孔等性状之间的相关性。同时,为了进一步检测环境变化下的表皮毛响应特征以及与气孔之间的协同关系,本研究利用其中15个种群开展了同质园试验。研究结果发现,栓皮栎叶片表皮毛密度平均值为459.78个mm^(−2),变异范围为325.79–552.38 mm^(−2)。表皮毛密度会随纬度增加而增加,随经度减少而减少,并且与温度和降水呈负相关。同时发现,无论是在野外还是在同质园,叶片表皮毛密度均与气孔密度呈正相关,并且两者均会随干旱强度的增加而增加。这些结果表明,面对环境变化叶片表皮毛密度具有高度的适应性变异,并且可与气孔协同适应这种变化。该研究结果对加深理解气候变化下植物适应策略以及叶片功能性状之间的协同互作具有重要意义。Leaf trichomes are derived from epidermal cells and serve an important function in regulating leaf heat balance and gas exchange.Variation in leaf functional traits is critical for predicting how plants will react to global climate change.In this study,we aimed to investigate how leaf trichome densities vary along large geographic gradients and how they interact with stomata in response to environmental change.We investigated the leaf trichome densities of 44 Quercus variabilis populations in Eastern Asia(24°–51.8°N,99°–137°E)and their correlation with climatic factors and stomatal traits.In addition,15 populations were grown in a common garden to study their adaptive variation and coordination with stomata.The mean value of trichome density in situ conditions was 459.78 trichome mm^(−2) with a range of 325.79–552.38 trichome mm^(−2).Trichome density increased with latitude and decreased with longitude.Both temperature and precipitation reduced the trichome density.Moreover,trichome density was positively correlated with stomatal density whether in situ or in the common garden,and both increased with drought.Our results suggested that leaf trichomes possess highly adaptive variation and are in close coordination with stomata in response to climate change.Our fndings provide new insights toward elucidating the interactions between leaf traits and the adaptive strategies of plants under climate change.

关 键 词：叶片功能性状 表皮毛 气孔 性状-性状关系 性状-环境关系 气候变化 

分 类 号：Q94[生物学—植物学]