Effects of Low CO2 on Photosynthetic Characteristics of Ottelia alismoides and Hydrilla verticillata
LI Zhao-Bo1,2,3, LI Wei1,3, GU Shu-Ping1,3, CAO Yu1,2,3, YIN Li-Yan1,3
1. Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China;2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;3. Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan 430074, China
Abstract：Photosynthetic characteristics of Ottelia alismoides and Hydrilla verticillata were studied after the two species were incubated under low CO2 conditions.The PEPC/Rubisco ratio of O.alismoides increased from 0.45 to 4.17 and of H.verticillata increased from 0.47 to 4.17 after low CO2 induction.The activity of PEPC and NAD-ME increased more than 10-fold and other C4 enzymes such as NAD-MDH and PPDK also increased significantly after low CO2 induction.Other photosynthetic characteristics also changed significantly.The net photosynthetic rate of O.alismoides and H.verticillata increased by 50.8% and 74.1%,respectively,and the oxygen inhibition on photosynthetic rate of the two species decreased to 35% and 60%,respectively,after low CO2 induction.The chlorophyll fluorescence parameters also changed after low CO2 induction.All these facts indicated that photosynthetic carbon assimilation of O.alismoides and H.verticillata might shift from C3 to C4 after low CO2 induction.
李兆波;;李伟;顾舒平;操瑜;;尹黎燕;. 低浓度CO2对水车前和黑藻光合特性的影响[J]. 植物科学学报, 2011, 29(2): 226-233.
LI Zhao-Bo;;LI Wei;GU Shu-Ping;CAO Yu;;YIN Li-Yan;. Effects of Low CO2 on Photosynthetic Characteristics of Ottelia alismoides and Hydrilla verticillata. , 2011, 29(2): 226-233.
2011, Vol. 29 
