DONG Qiao,SONG Yang,SUN Qian,et al.Effect of Different Light Intensity and CO2 Concentration on Photosynthesis and Chlorophyll Fluorescence Parameters of Grafting Cucumber Leaves in Greenhouse[J].Northern Horticulture,2015,39(22):1-6.[doi:10.11937/bfyy.201522001]
不同光强和CO2浓度对温室嫁接黄瓜光合作用及叶绿素荧光参数的影响
- Title:
- Effect of Different Light Intensity and CO2 Concentration on Photosynthesis and Chlorophyll Fluorescence Parameters of Grafting Cucumber Leaves in Greenhouse
- Keywords:
- cucumber; light intensity; CO2 concentration; photosynthesis; chlorophyll fluorescence parameters
- 文献标志码:
- A
- 摘要:
- 以温室嫁接黄瓜为试材，研究不同光照强度和CO2浓度互作条件下叶片净光合速率和叶绿素荧光参数日变化规律及其相互关系，旨在为温室嫁接黄瓜高产优质栽培提供参考依据。结果表明：相对100%光照下叶片净光合速率（Pn）、光化学猝灭（qP）的日变化均呈双峰曲线，相对15%光照和32%光照处理的日变化均为单峰曲线，说明适当遮阴可以有效缓解温室黄瓜光合“午休”现象；相对100%光照+高浓度CO2处理组合的净光合速率（Pn）值最大，可以有效提高黄瓜叶片的光合效率，为光强和CO2浓度的较优组合；相对32%光照下施加中浓度CO2的处理组合叶绿素荧光参数Fv/Fm、qP、NPQ日变化值均最大，净光合速率（Pn）值也较大，为光强和CO2浓度的较优组合，说明冬季弱光条件下，适当增施CO2可以提高黄瓜叶片的光合效率，减少光照不足的影响。
- Abstract:
- With grafted cucumber in greenhouse as test material，the diurnal changes photosynthetic rate and chlorophyll fluorescence parameters of grafting cucumber leaves in greenhouse were studied under different light intensity and CO2 concentration，and the relationship between photosynthetic rate and chlorophyll fluorescence parameters was also analyzed to provide theoretical basis and practical support for high yield and good quality cultivation of grafting cucumber in greenhouse.The results showed that the diurnal changes of Pn，qP under 100% light intensity were double-peak curve，and a phenomenon of midday depression appeared.It under 15% and 32% light intensity were unimodal curve，showed that proper shade could effectively relieve the midday depression phenomenon.The Pn values of treatment combination of 100% light intensity+high concentration of CO2 was the biggest，it could effectively improve photosynthetic efficiency，so it was the better combination.The Fv/Fm，qP，NPQ values under 32% light intensity were the biggest increasing middle concentration of CO2 and photosynthetic rate (Pn) value was bigger also，so it was a better combination，showed that under the condition of weak light in winter，increasing CO2 concentration appropriately could improve photosynthetic efficiency，then reduced the influence of light intensity inadequate.
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备注/Memo
第一作者简介：董乔（1991-），女，蒙古族，硕士研究生，研究方向为设施园艺及抗逆生理。E-mail:dongqiao111@126.com.责任作者：崔世茂（1961-），男，博士，教授，博士生导师，现主要从事园艺作物抗逆生理和园艺设施及环境调控等研究工作。E-mail:cuishimao@〖JP3〗sina.com.基金项目：国家自然科学基金资助项目（31060269）；内蒙古自治区科技计划资助项目（20110710）；教育部博士点基金资助项目（20101515110005）。