摘要
对海岛棉"海7124"、亚洲棉"金华中棉"、非洲棉"红心棉"和陆地棉"苏12"4个棉花栽培种的光合参数和叶片荧光参数进行研究。结果显示,棉花叶片比叶重、叶绿素含量、Pn、Fv/Fm和qP均表现为"海7124">"苏12">"金华中棉">"红心棉",说明"海7124"具有高光效的特点。研究还表明,"海7124"、"金华中棉"、"苏12"光合速率日变化呈双峰曲线,"红心棉"为单峰曲线。光合速率日变化与气孔导度的日变化一致,中午光合速率的下降与气孔导度及PSII光化学效率降低有关。
The photosynthetic and fluorescence characteristics of "Hai7124"(Gossypium barbadense),"Jinhuazhongmian"(G.arboreum),"Hongxinmian"(G.herbaceum) and "Su12"(G.hirsutum) were analyzed in this paper.The results show that total chlorophyll content,leaf mass per area,Pn,PSⅡ photochemical efficiency(Fv/Fm) and photochemical quenching(qP) of the cotton cultivars are the following order: "Hai7124" 〉 "Su12" 〉 "Jinhuazhongmian" 〉 "Hongxinmian",indicating that "Hai7124" has higher photosynthetic efficiency.Further investigation shows that diurnal variation curves of Pn for "Hai7124","Jinhuazhongmian" and "Su12" have two peaks that occur at 12:00 and 16:00,though Pn for "Hongxinmian" varies and has a uni-peak curve that occurs between 12:00 ~ 14:00.This is consistent with diurnal variations in stomatal conductance(Cs).Photoinhibition of photosynthesis at noon is related with decreasing Cs and PSⅡ photochemical efficiency.
出处
《中国生态农业学报》
CAS
CSCD
2008年第5期1149-1153,共5页
Chinese Journal of Eco-Agriculture
基金
安徽省自然科学基金项目(01041106)资助
关键词
棉花栽培种
荧光特性
光合特性
光化学效率
气孔导度
Cotton cultivar,Fluorescence characteristics,Photosynthetic characteristics,Photochemical efficiency,Stomatal conductance