基于结构方程模型的气孔、光合相关生理因素与产量、品质的关系研究  

Research on the Relationship Between Stomatal and Photosynthetic Physiological Factors and Yield and Quality Based on Structural Equation Modeling

作　　者：皇晶晶 李叶[1] 耿涛 娄德钊 林培群[1] 武华周 HUANG Jingjing;LI Ye;GENG Tao;LOU Dezhao;LIN Peiqun;WU Huazhou(Institute of Environment and Plant Protection,Chinese Academy of Tropical Agricultural Sciences,Haikou,Hainan 571101,China;Hainan University,Haikou,Hainan 570228,China)

机构地区：[1]中国热带农业科学院环境与植物保护研究所,海南海口571101 [2]海南大学,海南海口570228

出　　处：《热带作物学报》2025年第4期958-967,共10页Chinese Journal of Tropical Crops

基　　金：中央级公益性科研院所基本科研业务费专项(No.1630042021026);国家蚕桑产业技术体系(No.CARS-18)。

摘　　要：增强光合作用是提高作物产量和品质的关键,农艺性状、光合参数与品种的产量、品质之间的相互作用尚不明确。本研究以10个不同桑树品种为研究对象,基于课题组统计获取的桑树(Morus sp.)叶片大小、叶片数、分枝数等形态数据和粗蛋白等营养指标数据,以及测定的光合参数,通过相关性分析各指标中具体参数的相关性,并利用结构方程模型分析其农艺性状、气孔特性、光合指标对桑叶产量、品质的影响机制和贡献潜力。结果表明:不同品种桑树在气孔特性和光合指标上存在显著差异,沙2×伦109品种显示出良好的光合能力和水分利用效率;在相关性分析中,胞间二氧化碳浓度(C_(i))与叶长、叶宽、全钙含量均显著相关,气孔长度与气孔宽度之间极显著正相关(r=0.833),粗蛋白含量与叶重之间呈正相关(r=0.660);结构方程模型表明,桑树的气孔特性对叶品质存在负向效应(R^(2)=–0.75),C_(i)对净光合速率(P_(n))有负向效应(R^(2)=-0.91),C_(i)和P_(n)直接影响叶产量(R^(2)分别为2.99和3.04),叶产量对叶品质具有正向效应(R^(2)=0.66)。研究结果表明,不同桑树品种通过气孔特性、胞间二氧化碳浓度影响其净光合速率,进一步影响桑树的产量和品质。因此,通过调控桑树气孔的特性可提高桑树的产量和品质,为今后桑树品种改良和精准栽培管理提供科学依据,具有重要的实践意义。Enhancing photosynthesis is the key to improving crop yield and quality.The interaction between agronomic traits,photosynthetic parameters,and variety yield and quality is not yet clear.In this study,10 different mulberry varieties(Morus sp.)were taken as the research objects.Based on the morphological data such as leaf size,the number of leaves,the number of branches,etc.,obtained through the statistics of our research group,the nutritional index data such as crude protein,and the measured photosynthetic parameters,we analyzed the correlations of specific parameters within each index through correlation analysis.And we utilized the structural equation model to analyze the influence mechanism and contribution potential of their agronomic traits,stomatal characteristics,and photosynthetic indexes on the yield and quality of mulberry leaves.There were significant differences in stomatal characteristics and photosynthetic indicators among different varieties,and Sha 2×Lun 109 exhibited good photosynthetic capacity and water use efficiency.There was a significant correlation between intercellular carbon dioxide concentration and leaf length,leaf width,and total calcium content.There was a strong positive correlation between stomatal length and width(r=0.833),and a positive correlation between crude protein content and leaf weight(r=0.660).The structural equation model indicated that the stomatal characteristics had a negative effect on leaf quality(R^(2)=–0.75),while the intercellular carbon dioxide concentration had a negative effect on net photosynthetic rate(R^(2)=-0.91).The intercellular carbon dioxide concentration and net photosynthetic rate directly affected leaf yield(R^(2)=2.99 and 3.04,respectively),and leaf yield had a positive effect on leaf quality(R^(2)=0.66).The research shows that mulberry varieties affect the net photosynthetic rate through stomatal characteristics and intercellular carbon dioxide concentration,which further affects the yield and quality of mulberry trees.Therefore,by regulating t

关 键 词：气孔特性 光合参数 营养成分 农艺性状 结构方程模型 

分 类 号：S565.4[农业科学—作物学]