枝条角度对中国沙棘水碳代谢和生长结实的影响  

Effects of Water and Carbon Metabolism on Growth Traits from the Angle of Hippophae rhamnoides subsp.sinensis Rousi

作　　者：李泽淇 李海波[1] 刘永强 杭宇杰 张弘毅 王林[1] LI Ze-qi;LI Hai-bo;LIU Yong-qiang;HANG Yu-jie;ZHANG Hong-yi;WANG Lin(College of Forestry,Shanxi Agricultural University,Jinzhong 030600,Shanxi,China)

机构地区：[1]山西农业大学林学院,山西晋中030600

出　　处：《林业科学研究》2024年第5期94-104,共11页Forest Research

基　　金：山西农业大学生物育种工程项目(YZGC139);山西省重点研发计划项目(201903D221051)。

摘　　要：[目的]研究中国沙棘不同角度枝条的水碳代谢与生长结实的关系,深入了解枝条角度对生长结实的影响及其生理机制,为沙棘的高效栽培技术措施的制定提供理论依据。[方法]本研究选择中国沙棘0°、45°、90°、135°4种角度枝条作为研究对象,比较其水势和水分输导能力、光合作用、非结构性碳水化合物、营养生长和花芽分化情况、结实性状以及果实营养成分上的差异,并进一步分析不同角度枝条的水碳代谢和生长结实之间的相互关系。[结果]0°~90°枝条的7月水势无显著差异,135°枝条7月凌晨和正午水势显著低于其它角度。随着枝条角度的增加,7月和9月的枝条PLC均呈升高趋势,枝条叶面积比导水率和茎面积比导水率呈降低趋势。0°~90°枝条的净光合速率差异不显著,135°枝条净光合速率显著低于其它角度。7月枝条NSC含量无显著差异,9月枝条木质部NSC含量呈先升后降的趋势,韧皮部NSC含量随枝条角度的增大而降低。随着枝条角度的增大,叶面积和新梢生长情况均呈降低趋势,比叶重、新梢总数、花芽占比、花芽纵横径、果实纵横经和百果质量、10 cm结果数和总黄酮含量均呈先升后降的趋势,在45°和90°达到较高水平。[结论]随着枝条角度的增加,干旱时期的水分状况变差,枝条营养生长变弱,NSC储藏、花芽分化、结实性状在45°~90°达到较高水平,因此在生产上利用45°~90°枝条结实可以提高中国沙棘产量。[Objective]The aims of the study are to explore the relationship between water-carbon metabolism and growth and fruiting of different angle branches of Hippophae rhamnoides subsp.sinensis Rousi,deeply understand the impact of branch angle on water-carbon metabolism and growth and fruiting,as well as its intrinsic physiological mechanisms,and provide a theoretical basis for the formulation of efficient cultivation techniques for seabuckthorn.[Method]Based on the four angle branches(0°,45°,90°,and 135°)of Hippophae rhamnoides subsp.sinensis Rousi,the differences in water status,photosynthesis,nonstructural carbohydrate(NSC)content,branch and leaf buds growth status,fruiting traits,and fruit nutritional components of different angle branches were compared,and the relationship between water-carbon metabolism and growth and fruiting of different angle branches was analyzed.[Result]There was no significant difference in the water potential between 0°-90°branches in July.The water potential of 135°branches in the early morning and noon of July was significantly lower than other angles.With the increase of branch angle,the PLC of branches in July and September showed an increasing trend,while the specific leaf area hydraulic conductivity and the specific stem area hydraulic conductivity of branches showed a decreasing trend.The difference in net photosynthetic rate between 0°-90°branches was not significant,while the net photosynthetic rate of 135°branches was significantly lower than other angles.There was no significant difference in NSC content in branches in July,but the NSC content in the xylem of branches increased first and then decreased.The NSC content in the phloem of branches decreased with the increase of branch angle in September.Leaf area and growth of new shoots decreased with the increase of branch angle.While specific leaf weight,total number of new shoots,flower bud proportion,flower bud longitudinal and transverse diameter,fruit longitudinal and transverse diameter and 100-fruit weight,number

关 键 词：中国沙棘 枝条角度 水碳代谢 花芽 生长 结实性状 

分 类 号：S793.6[农业科学—林木遗传育种]