摘要
采用MINI-IMAGING-PAM成像叶绿素荧光仪,测试了高温处理后黄瓜果实表面叶绿素荧光动力学参数,分析探索了高温对黄瓜果实表面光系统Ⅱ(PSⅡ)光能吸收利用效率的影响。结果表明,高温处理后,果实表面初始荧光Fo和非调节性能量耗散量子产量Y(NO)随温度的升高而升高;最大荧光Fm、最大光化学效率Fv/Fm、实际量子产量Y(Ⅱ)和调节性能量耗散量子产量Y(NPQ)随温度的升高而降低。综合分析表明,温度在46℃以下时,果实表面的光合机构以调节性能量耗散来保护反应中心,维持反应中心较高的光能吸收利用效率;46℃以上的高温使果实表面调节性能量耗散机构失活,过剩能量以热耗散形式散发,破坏了光合机构。
The aim was to investigate the effect of the high temperature on the light utilization efficiency of photosystem Ⅱ of cucumber fruit.The effects of high temperature stress on the chlorophyll fluorescence parameters of cucumber fruit were measured by MINI-IMAGING-PAM.The results showed that the initial fluorescence （Fo ） and quantum yield of unregulated energy dissipationY （NO ） of cucumber fruit were raised with the temperature.In contrary,the maximal fluorescence （Fm ）,maximal photochemical （Fv/Fm ）,effective quantum yieldY （Ⅱ ） and quantum yield of regulated energy dissipationY （NPQ ） of PSⅡ were reduced.The photosynthetic apparatus were protected by the increased quantum yield of regulated energy dissipation and keeping the higher efficiency of reaction centers when the temperature was under 46℃.With the temperature rising again,the excessive light was dissipated by the regulated energy dissipation apparatus of fruit,and destroyed the photosynthetic apparatus.
出处
《中国农学通报》
CSCD
北大核心
2011年第8期181-184,共4页
Chinese Agricultural Science Bulletin
基金
河北省"十一五"科技支撑计划项目"冀中地区蔬菜优质高效种植模式研究(定州)"(07220701D)资助
关键词
高温
叶绿素荧光
光化学效率
北方白黄瓜
high temperature
chlorophyll fluorescence
photochemical efficiency
cucumber fruit
作者简介
林丽，女，1987年出生，在读硕士，主要从事设施蔬菜生理生态及生长调控研究。通信地址：071001河北省保定市河北农业大学西校区园艺学院2008级研，Tel：0312—7528325，E—mail：lin82539500@126．com．
通讯作者：高志奎，男，1963年出生，教授，博士生导师，博士，主要从事蔬菜光合生理研究。通信地址：071001河北省保定市河北农业大学西校区园艺学院，Tel：0312—7528325，E—mail：gaozhikui2005@163．com。
