Photosynthesis and metabolite responses of Isatis indigotica Fortune to elevated [CO2]

作     者：Ping Li Hongying Li Yuzheng Zong Frank Yonghong Li Yuanhuai Han Xingyu Hao 

作者机构：College of Agriculture Shanxi Agricultural University Taigu 030801 Shanxi China Key Laboratory of Loess Plateau Crop Gene Resources and Germplasm Ministry of Agriculture Taiyuan 030001 Shanxi China Shanxi Key Laboratory of Genetic Resources and Genetic Improvement of Minor Crops Taigu 030801 Shanxi China 

出 版 物：《The Crop Journal》 (作物学报（英文版）)

年 卷 期：2017年第5卷第4期

页      面：345-353页

核心收录：

学科分类：1008[医学-中药学(可授医学、理学学位)] 10[医学] 

基　　金：partially supported by the National Natural Science Foundation of China (Nos. 31601212, 31371693, and 31471556) Research on Science and Technology of Shanxi Province (No. 20150311006-2) Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (No. 2015146) the Shanxi 100-Talent Program 

主　　题：Isatis indigotica Fortune Elevated [CO2] Biomass Photosynthesis Metabolites 

摘      要：Climate change is affecting global crop productivity, food quality, and security. However,few studies have addressed the mechanism by which elevated CO_2 may affect the growth of medicinal plants. Isatis indigotica Fortune is a widely used Chinese medicinal herb with multiple pharmacological properties. To investigate the physiological mechanism of *** response to elevated [CO_2], plants were grown at either ambient [CO_2](385 μmol mol^(-1)) or elevated [CO_2] (590 μmol mol^(-1)) in an open-top chamber (OTC)experimental facility in North China. A significant reduction in transpiration rate (T_r) and stomatal conductance (g_s) and a large increase in water-use efficiency contributed to an increase in net photosynthetic rate (Pn) under elevated [CO_2] 76 days after sowing. Leaf non-photochemical quenching (NPQ) was decreased, so that more energy was used in effective quantum yield of PSII photochemistry (Φ_(PSⅡ)) under elevated [CO_2]. High ΦPSII,meaning high electron transfer efficiency, also increased Pn. The [CO_2]-induced increase in photosynthesis significantly increased biomass by 36.8%. Amounts of metabolic compounds involved in sucrose metabolism, pyrimidine metabolism, flavonoid biosynthesis, and other processes in leaves were reduced under elevated [CO_2]. These results showed that the fertilization effect of elevated [CO_2] is conducive to increasing dry weight but not secondary metabolism in I. indigotica.