PAN Lu,CUI Shimao,SONG Yang,et al.High Temperature Response Mechanism of Photosynthesis of Grafting Cucumber in Greenhouse Under Long-term Elevated CO2[J].Northern Horticulture,2015,39(16):1-6.[doi:10.11937/bfyy.201516001]
长期加富CO2条件下温室黄瓜光合作用对高温的应答机理
- Title:
- High Temperature Response Mechanism of Photosynthesis of Grafting Cucumber in Greenhouse Under Long-term Elevated CO2
- 关键词:
- 黄瓜; 高温; CO2加富; 光合作用; Rubisco活化酶
- 文献标志码:
- A
- 摘要:
- 以温室嫁接黄瓜为试材，研究了长期加富CO2和高温条件下叶片光合指标、叶绿素含量、Rubisco活性以及Rubisco活化酶活性随时间的变化规律及其相互关系。旨在为高温季节温室黄瓜高产优质栽培提供参考依据和实践支持，以及为未来由于CO2浓度升高引起的“温室效应”对作物造成的影响进行探究。结果表明：长期加富CO2和高温条件下，净光合速率、胞间CO2浓度、气孔导度、蒸腾速率、叶绿素含量、Rubisco活性以及Rubisco活化酶活性均显著提高，其平均值分别高于对照38.83%、66.88%、28.2%、26.07%、37.2%、37.06% 以及44.16%；长期CO2+高温是显著提高叶片净光合速率的直接原因，因其提高了胞间CO2浓度，从而提高了叶片叶绿素含量以及Rubisco活性，最终在光合作用光反应和暗反应2个过程中促进净光合速率提高；长期CO2+高温可以解除长时间CO2施肥带来的“光合适应”现象，从而提高光合速率。
- Abstract:
- Taking grafting cucunmber in greenhouse as materials，the changes and relationship with time of photosynthesis，chlorophyll content，Rubisco activity and Rubisco activase activity of grafting cucumber leaves in greenhouse were studied under long-term elevated CO2 and high temperature，to provide reference for high yield and quality of cucumber cultivation under high temperature in greenhouse，and to discuss greenhouse effect caused by high concentration of CO2 on plant growth.The results showed that compared with the control，long-term elevated CO2 and high temperature led to a remarkable increase in values of the photosynthetic rate，intercellular CO2 concentration，stomatal conductance，transpiration rate，chlorophyll content，Rubisco activity and Rubisco activase activity.Through increasing intercellular CO2 concentration，chlorophyll content and Rubisco activity were increased，and eventually photosynthetic rate was affected under long-term elevated CO2 and high temperature.Photosynthetic rate was increased by removing ‘photosynthetic adaptation’ phenomenon under long-term elevated CO2 and high temperature.
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备注/Memo
第一作者简介：潘璐（1989-），女，博士研究生，研究方向为设施园艺及抗性生理。E-mail：baby_pl0911@163.com.责任作者：崔世茂（1961-），男，博士，教授，博士生导师，研究方向为设施园艺及抗性生理。E-mail：cuishimao@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)。