设施番茄不同叶位补光对植株形态、光合及激素合成的影响  

Effects of Supplemental Lighting at Different Positions on Tomato Plant Morphology,Photosynthesis and Endogenous Hormone Biosynthesis Under Low-light Environment

作　　者：齐振宇[1] 王婷[2] 桑康琪 刘玥[2] 王明钦 喻景权[2] 周艳虹[2] 夏晓剑[2] QI Zhenyu;WANG Ting;SANG Kangqi;LIU Yue;WANG Mingqin;YU Jingquan;ZHOUYanhong;XIA Xiaojian(Agricultural Experiment Station,Zhejiang University,Hangzhou 310058,China;Department of Horticulture,Zhejiang University,Hangzhou 310058,China;Shouguang New Century Seedling Co.,Ltd.,Weifang,Shandong 262700,China)

机构地区：[1]浙江大学农业试验站,杭州310058 [2]浙江大学园艺系,杭州310058 [3]寿光市新世纪种苗有限公司,山东潍坊262700

出　　处：《园艺学报》2021年第8期1504-1516,共13页Acta Horticulturae Sinica

基　　金：国家重点研发计划项目(2019YFD1001900);国家自然科学基金面上项目(31872153);泰山产业领军人才工程高效生态农业创新项目(LJNY202016);浙江省公益技术研究项目(LGN20C150011);浙江大学实验技术研究项目(SJS201816)。

摘　　要：在设施弱光环境下对番茄植株采取顶部和植株间两个部位LED补光的方式,研究其对植株形态、光合效率和激素代谢的影响。结果发现顶部补光对不同位置叶片光合效率均有促进作用,并导致整体叶面积增大、植株变矮、叶夹角变小以及开花数增多,植株形态变化伴随生长素(IAA)含量降低、细胞分裂素(CK)含量升高以及油菜素内酯(BR)合成基因下调。植株间补光主要促进中部和下部叶片光合效率提高和叶面积增大,显著增加株高,能使上部叶片夹角略有增加,但对开花数没有影响,整体上对激素代谢的影响不如顶部补光。总体而言,顶部补光更有利于形成良好株形,整体上促进番茄光合作用和生长,有更高的推广应用价值。Greenhouse tomato production is often limited by insufficient light.It is of great significance to use LEDs for improvement of light environment.However,considering the cost and efficient use of resources,development and optimization of LED supplemental lighting technology are urgently required.In this study,the tomato plants were supplemented with top-lighting and inter-lighting using LEDs in a low-light environment,and the effects on plant morphology,photosynthetic efficiency and hormone metabolism were studied.Top-lighting promoted the photosynthetic efficiency of leaves at different positions,and led to an overall increase in the leaf area,a shorter plant height,smaller leaf angles,and an increase in the number of flowers.Changes in plant morphology were accompanied by reduced auxin(IAA)content,increased cytokinin(CK)content and down-regulation of brassinosteroid(BR)synthesis genes.Inter-lighting mainly promotes the photosynthetic efficiency and leaf area of the middle and lower leaves,significantly increased plant height and slightly increased the leaf angles of upper leaves.However,it had no effect on flower number,and in general had less effects on hormone metabolism as compared with top-lighting.Taken together,the top-lighting facilitates the formation of a better plant architecture,and promotes the photosynthesis and growth of tomato plants as a whole,and is a promising technology with potential application in the future.

关 键 词：番茄 设施番茄 叶绿素荧光 LED 光合作用 补光 

分 类 号：S641.2[农业科学—蔬菜学]