欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报

• 研究报告 • 上一篇    下一篇

两种化感物质对茄子幼苗光合作用及叶绿素荧光参数的影响

郁继华;张韵;牛彩霞;李建建   

  1. 甘肃农业大学农学院, 兰州 730070
  • 收稿日期:2006-03-03 修回日期:2006-06-21 出版日期:2006-09-18 发布日期:2006-09-18

Effects of two kinds of allelochemicals on photosynthesis and chlorophyll fluorescence parameters of Solanum melongena L. seedlings

YU Jihua; ZHANG Yun; NIU Caixia; LI Jianjian   

  1. College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2006-03-03 Revised:2006-06-21 Online:2006-09-18 Published:2006-09-18

摘要: 采用基质栽培,研究不同浓度的2,6-二叔丁基苯酚及邻苯二甲酸二甲酯对茄子幼苗光合作用及叶绿素荧光参数的影响.结果表明,两种化感物质使茄子叶片叶绿素含量、光合速率(Pn)、气孔导度(Gs)下降,细胞间隙CO2浓度(Ci)先降低后升高;使茄子叶片的初始荧光(Fo)增加,PSⅡ最大光化学效率(Fv/Fm)、光系统Ⅱ光合电子传递量子效率(ФPSⅡ)、光化学猝灭系数(qP)、天线转化效率(Fv' /Fm)降低.2,6-二叔丁基苯酚使茄子叶片非光化学猝灭系数(qN)先升高后降低,邻苯二甲酸二甲酯使qN低于对照,对茄子叶片光合机构造成了伤害.

关键词: 农业生态气候资源, 定量分析, 分类评价, 甘肃

Abstract: In a culture experiment, the effects of different concentration 2,6-bis (1,1-dimethylethyl) phenol and 1,2-benzodicarboxylic dimethyl ester on the photosynthesis and chlorophyll fluorescence characteristics of eggplant seedlings were studied, and the results showed that these two allelochemicals were the barriers of chlorophyll content, net photosynthetic rate(Pn), and stomatal conductance(Gs). The intercellular CO2 concentration(Ci) decreased in the former period, and then increased. The allelochemicals increased initial fluorescence(Fo), but decreased maximum photochemical efficiency of PSⅡ(Fv/Fm), quantum efficiency of non-cyclic electron transport of PSⅡ(ФPSⅡ), photochemical quenching ((qP) and antenna conversion efficiency (Fv′/Fm′). 2,6-bis (1,1-dimethylethyl) phenol made non-photochemical quenching (qN) increase first and decrease then, while 1,2-benzodicarboxylic dimethyl ester decreased qN, which was harmful to the photosynthesis structure.

Key words: Agro ecoclimatic resources, Quantitative analysis, Classified evaluation, Gansu province