北华大学学报（自然科学版）2025，Vol.26Issue(1)：17-23,7.DOI:10.11713/j.issn.1009-4822.2025.01.003
不同遮阴条件对北美冬青幼苗叶片光合特性与超微结构的影响
Effects of Different Shading Conditions on Photosynthetic Characteristics and Ultrastructure of Ilex verticillata Seedling Leaves
摘要
Abstract
To study the photosynthetic physiological characteristics and ultrastructure of Ilex verticillata seedlings under different shading conditions,aiming to reveal their adaptation to light demand,growth characteristics in the Northeast region and photosynthetic and ultrastructure relationship,and provide a basis for the introduction,cultivation and management of Ilex verticillata seedlings.The photosynthetic target and chlorophyll fluorescence of 3-year-old Ilex verticillata seedlings were measured under four shading conditions:full light(L0),35%shading(L35),55%shading(L55),and 75%shading(L75)using Li-6800 photosynthetic apparatus.The leaf ultra-structure of Ilex verticillata was observed by using scanning electron microscopy.The daily variation curve of net photosynthetic rate in the four treatment groups in July showed a single peak;The light response curve of Ilex verticillata seedlings showed the best performance in the 35%shading.As the degree of shading increases,Fo,F′m,F′v,F′v/F′m,FS,and qP under light adaptation gradually increase;The QNP of Ilex verticillata seedlings decreases with increasing shading,and the leaves of Ilex verticillata alleviate photosynthetic damage by consuming heat dissipation energy under strong light stress,exhibiting high light protection ability.The stomatal opening of leaves in Ilex verticillata seedlings increases with increasing light intensity,but excessive light can inhibit stomatal opening.When the net photosynthetic rate is at its maximum,the stomatal opening degree is at its maximum,and the size and opening degree of stomata will change with the change of net photosynthetic rate.关键词
北美冬青/遮阴/光合特性/超微结构Key words
Ilex verticillata/shading/photosynthetic characteristics/ultrastructure分类
农业科技引用本文复制引用
王玉莹,吴生海,王金玲,吕伟伟,于志会,杨春波,杜凤国..不同遮阴条件对北美冬青幼苗叶片光合特性与超微结构的影响[J].北华大学学报（自然科学版）,2025,26(1):17-23,7.基金项目
国家林业和草原局林业外来物种调查与研究专项(KJZXSA202019). （KJZXSA202019）
