FENG Lijuan,YANG Xuemei,TANG Haixia,et al.Effects of Exogenous Citric Acid on Diurnal Change of Photosynthesis in Pomegranate[J].Northern Horticulture,2019,43(19):39-44.[doi:10.11937/bfyy.20190033]
外源柠檬酸对石榴光合日变化的影响
- Title:
- Effects of Exogenous Citric Acid on Diurnal Change of Photosynthesis in Pomegranate
- Keywords:
- Punica granatum; citric acid; photosynthesis; diurnal changes
- 文献标志码:
- A
- 摘要:
- 以‘泰山红’石榴为试材，利用CIRAS-3型便携式光合仪，研究了柠檬酸处理对石榴光合参数日变化的影响，以期为石榴生产的栽培调控提供参考依据。结果表明：随时间的增加，外界大气温度和光合有效辐射先升高后降低，分别在14：00和12：00左右出现峰值。在对照和不同浓度柠檬酸处理条件下，石榴叶片中净光合速率、气孔导度和蒸腾速率日变化趋势均呈典型的双峰曲线，细胞间CO2浓度和水分利用效率呈先降低后升高的变化趋势，水蒸气压亏缺先升高后降低再升高。石榴光合能力降低受气孔和非气孔因素的限制。与对照相比较，柠檬酸处理显著提高了石榴叶片的净光合速率、气孔导度、蒸腾速率、细胞间CO2浓度、水分利用效率和水蒸气压亏缺，以0.2%柠檬酸处理效果最佳。净光合速率与大气温度、光合有效辐射、气孔导度和蒸腾速率密切相关，细胞间CO2浓度负相关。水分利用效率与细胞间CO2浓度和水蒸气压亏缺正相关。
- Abstract:
- The effect of exogenous citric acid on diurnal change of photosynthesis was studied in pomegranate cultivar ‘Taishanhong’ by CIRAS-3 portable photosynthesis system.It could provide a theoretical basis for the cultivation regulation of pomegranate production.The results showed that the air temperature and photosynthetic active radiation increased first and then decreased with the time increased，which peak value appeared at 14:00 and 12:00，respectively.Under the control and different concentrations of citric acid treatment，the diurnal variation trend of net photosynthetic rate，stomatal conductance and transpiration rate of pomegranate leaves showed a typical double-peak curve.The intercellular CO2 concentration and water use efficiency decreased first and then increased.The change trend of vapour pressure deficit first increased，then decreased and increased.The reduction of photosynthetic capacity was affected by the stomatal and non-stomatal factors in pomegranate.Compared with the control，citric acid treatment significantly improved the net photosynthetic rate，stomatal conductance，transpiration rate，intercellular CO2 concentration，water use efficiency and vapor pressure deficit of pomegranate leaves，and the best treatment was 0.2% citric acid.The net photosynthetic rate was closely related with air temperature，photosynthetic active radiation，stomatal conductance and transpiration rate，and significantly negative related with intercellular CO2 concentration.Water use efficiency was positively correlated with intercellular CO2 concentration and vapor pressure deficit.
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备注/Memo
第一作者简介：冯立娟（1982-），女，博士，副研究员，研究方向为果树遗传资源评价与选育。E-mail：flj_19820227@163.com.责任作者：尹燕雷（1976-），男，硕士，研究员，研究方向为果树遗传资源评价与选育。E-mail：yylei66@sina.com.基金项目：山东省农业科学院农业科技创新工程基础理论研究资助项目；山东省重点研发计划资助项目（2018GNC111009）；山东省农业良种工程南种北繁资助项目（2017LZN023）。收稿日期：2019-03-06