7个杨树品种苗期叶片解剖结构和叶绿素荧光特性研究  

Study on Leaf Anatomical Structure and Chlorophyll Fluorescence Characteristics of Seven Poplar Varieties at Seedling Stage

作　　者：苗婷婷[1] 吴中能[1] 刘俊龙[1] 丁昌俊[2] 曹志华[1] 孙慧 闫彩霞 MIAO Tingting;WU Zhongneng;LIU Junlong;DING Changjun;CAO Zhihua;SUN Hui;YAN Caixia(Anhui Academy of Forestry,Hefei 230088;Forestry Research Institute,Chinese Academy of Forestry,Beijing 100091)

机构地区：[1]安徽省林业科学研究院,合肥230088 [2]中国林业科学研究院林业研究所,北京100091

出　　处：《中国农学通报》2024年第24期51-59,共9页Chinese Agricultural Science Bulletin

基　　金：国家十四五重点研发计划课题“欧美杨大径级工业资源材精准高效培育技术研究”(2021YFD2201201);2023年中央财政林业科技推广示范项目“安徽沿江地区不飞絮杨树品种高效培育技术推广示范”(皖〔2023〕TG08号)。

摘　　要：本研究旨在筛选具有高抗逆性和强适应性的杨树优良品种。通过系统研究7个杨树品种的苗期表观生长性状、叶片解剖结构和叶绿素荧光生理特征,并采用单因素方差分析方法比较各品种间指标的差异,同时运用主成分分析法对苗期的生态适应性进行综合评价。结果表明显示,(1)各杨树品种苗期生长表现、叶绿素含量和叶绿素荧光参数之间存在显著差异,叶片解剖结构中的下层栅栏厚度、上表皮厚度及上表皮相对厚度有显著差异。其中‘湘林75’和‘巨霸杨’叶绿素含量较高,Y(Ⅱ)、ETR、qP等叶绿素荧光参数也较高,光合能力较强;‘江淮1号杨’叶片较厚,下层栅栏组织发达,抗旱性较强。(2)叶片解剖结构与叶绿素荧光参数间存在相关关系,中脉厚度与ETR、Y(Ⅱ)均显著负相关,栅栏组织、CTR与Fv/Fm显著正相关。叶绿素含量与叶绿素荧光参数间存在相关关系,但未达显著水平。(3)7个杨树品种苗期生态适应性由强到弱为‘湘林75’>‘巨霸杨’>‘湘林90’>‘湘林80’>‘江淮1号杨’>‘2025杨’>‘皖林1号杨’(CK)。In order to screen the fine poplar varieties with strong resistance and adaptability,seven poplar varieties were taken as the research objects in this paper.The growth,leaf anatomical structure and chlorophyll fluorescence physiological characteristics of poplar varieties were comprehensively and systematically studied.Using one-way ANOVA method,comparative analysis was conducted on the differences in various indicators among different varieties.Principal component analysis was used to comprehensively evaluate the ecological adaptability of seven poplar varieties at seedling stage.The results showed that:(1)there were significant differences in growth,chlorophyll content and chlorophyll fluorescence parameters among different poplar varieties.There were significant differences in the thickness of lower palisade tissue,upper epidermis,and relative thickness of upper epidermis in the leaf anatomical structure.Among them,‘Xianglin 75’and‘Juba’had higher chlorophyll content,as well as higher chlorophyll fluorescence parameters such as Y(II),ETR,qP and stronger photosynthetic capacity.‘Jianghuai No.1’had higher leaf thickness,well-developed lower palisade tissue and stronger drought resistance.(2)There was a correlation between leaf anatomical structure and chlorophyll fluorescence parameters,with a significant negative correlation between principal vein thickness and ETR,Y(II),and a significant positive correlation between palisade tissue,CTR and Fv/Fm.There was a correlation between chlorophyll content and chlorophyll fluorescence parameters,but did not reach a significant level.(3)The order of ecological adaptability of seven poplar varieties at seedling stage was‘Xianglin 75’>‘Juba’>‘Xianglin 90’>‘Xianglin 80’>‘Jianghuai No.1’>‘2025’>‘Wanlin No.1’(CK).The results of this paper provided a reference basis for selecting suitable stress-resistant poplar varieties in the Jianghuai region of Anhui Province.

关 键 词：杨树 叶片解剖结构 叶绿素荧光特性 生态适应性 主成分分析 抗旱性 

分 类 号：S718.3[农业科学—林学]