文献类型：期刊文献

中文题名：不同千年桐种质叶片结构及光合特性

英文题名：Leaf structural and photosynthetic characteristics of different Vcmicia montana germplasms

作者：曹林青[1] 钟秋平[1] 邹玉玲[1] 田丰[1] 贺义昌[2]

第一作者：曹林青

机构：[1]中国林业科学研究院亚热带林业实验中心,江西分宜336600;[2]江西省林业科学院,江西南昌330000

年份：2022

卷号：42

期号：6

起止页码：592-599

中文期刊名：森林与环境学报

外文期刊名：Journal of Forest and Environment

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：“十三五”国家重点研发计划课题“油桐高效栽培与精细开发产业升级技术示范研究”(2017YFD0601304)。

语种：中文

中文关键词：千年桐;叶片结构;光合生理;高光效;冗余分析

外文关键词：Vcmicia montana;leaf structure;photosynthetic physiology;high photosynthetic efficiency;redundancy analysis

分类号：S794.3

摘要：探究千年桐叶片结构与光合特性的变异特征及其相关关系,为进一步阐明叶片性状对光合特征的影响机制。通过同质园试验,结合回归分析、冗余分析、主成分分析等方法,研究23份千年桐种质叶片解剖结构、气孔特征与光合生理参数的变异及其相关关系。结果表明:不同千年桐种质各叶片结构特征间的差异均达到了极显著水平;净光合速率间的差异极显著,蒸腾速率间、胞间CO_(2)浓度间的差异显著,气孔导度、水分利用效率差异不显著;净光合速率与栅海比、组织结构紧密度、气孔密度呈极显著正相关,与栅栏组织厚度、气孔长度呈显著正相关,与组织结构疏松度呈极显著负相关;影响光合生理的主要叶片结构为下表皮厚度、栅栏组织厚度、栅海比、气孔面积、海绵组织厚度,这些结构与光合生理间存在不同程度的相关关系;主成分分析表明,前2个主成分的累积贡献率达到94.243%,蒸腾速率和净光合速率可视为反映千年桐种质光合特征的主要指标,其中PJ、LN、NK-2、XS-1和PZ种质表现出较高的光合效率。千年桐叶片结构与光合生理之间关系密切,叶片结构因对地理气候产生的差异在一定程度上引起其光合生理发生相应地改变,从而适应环境的变化。
This study aimed to provide a scientific basis for elucidating the mechanisms by which leaf traits influence the photosynthetic characteristics and breeding of cultivars with high light efficiency. The variation and correlation of the leaf structural, stomatal, and photosynthetic characteristics of 23 Vcmicia montana germplasms were explored using a homogeneous garden test combined with regression analysis, redundancy analysis, and principal component analysis. Results showed extremely significant differences in leaf structure among the different germplasms. There were extremely significant differences in net photosynthetic rate, significant differences in transpiration rate, and intercellular CO_(2) concentration but no significant differences in stomatal conductance and water use efficiency. Net photosynthetic rate was extremely significantly positively correlated with palisade sea ratio, tissue structure compactness, and stomatal density;significantly positively correlated with palisade tissue thickness and stomatal long axis;and extremely significantly negatively correlated with tissue porosity. The main leaf structures affecting photosynthetic physiology included lower epidermis thickness, palisade tissue thickness, palisade sea ratio, stomatal area, and spongy tissue thickness, which had different degrees of correlation with photosynthetic physiology. Principal component analysis showed that the cumulative contribution rate of the first two principal components reached 94.243%, and the transpiration rate and net photosynthetic rate were the main indicators reflecting the photosynthetic characteristics of the 23 V. montana germplasms, among which PJ, LN, NK-2, XS-1, and PZ showed higher photosynthetic efficiency than the other germplasms. A close relationship was found between the leaf structure and photosynthetic physiology of V. montana. The differences in leaf structure due to geographic climate among V. montana germplasms influence their photosynthetic physiology to adapt to environmental changes.