文献类型：期刊文献

英文题名：Photosynthetic and physiological responses of native and exotic tidal woody seedlings to simulated tidal immersion

作者：Wu, Tonggui[1] Gu, Shenhua[2] Zhou, Hefeng[3] Wang, G. Geoff[4] Cheng, Xiangrong[1] Yu, Mukui[1]

第一作者：吴统贵

通信作者：Wu, TG[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China;[2]Forestry Stn Jiaxing, Jiaxing 314050, Zhejiang, Peoples R China;[3]Forestry Stn Cixi, Cixi 315300, Zhejiang, Peoples R China;[4]Clemson Univ, Sch Agr Forest & Environm Sci, Clemson, SC 29634 USA

年份：2013

卷号：135

起止页码：280-284

外文期刊名：ESTUARINE COASTAL AND SHELF SCIENCE

收录：;Scopus(收录号：2-s2.0-84888849317);WOS:【SCI-EXPANDED(收录号:WOS:000328871300029)】；

基金：The project was supported by the '948' Program of the State Forestry Administration of China (No. 2010-4-23), the National Scientific and Technical Supporting Program Funded by the Ministry of Science and Technology of China (No. 2009BADB2B03), and the Natural Science Foundation of Zhejiang Province (No. LY12C16008). We are grateful for all of the supports above. We also thank two anonymous reviewers for their helpful suggestion on improving this manuscript.

语种：英文

外文关键词：Hibiscus hamabo; Myrica cerifera; Tidal effect; Photosynthesis; Plant physiology; Hydrothermal solutions

摘要：Hibiscus hamabo, a native tidal woody species, and Myrica cerzfera, an exotic tidal woody species, have been widely planted on coastal beaches in subtropical China. However, whether there are differences in physiological response and tolerance to immersion between the two tidal species is still unknown. Our objectives were to evaluate differences in the photosynthetic and physiological responses to tidal immersion for the two species in the context of sea level rise. With increasing immersion, net photosynthesis, stomata' conductance, intercellular CO2 concentration, and light saturation point declined progressively for both species, whereas dark respiration and light compensation point showed the reverse trend. Lower variation was observed in H. hamabo than in M. cerifera for each index in the same treatment. Photosynthetic ability and utilization of light, especially under high light intensity, decreased for both species. Leaf soluble sugar and protein contents, and glycolate oxidase activity first increased and then decreased with increasing of immersion degree, with the higher values observed in the W4 (4 h duration, 15 cm depth) and W6 (6 h duration, 25 cm depth) treatments for H. hamabo, and W2 (2 h duration, 5 cm depth) and W4 treatments for M. cerifera. These findings indicate that H. hamabo has a better ability to keep the reduction of photosynthesis at a minimum through soluble substance regulated osmotic potential and avoiding excess light damage to the photosynthetic system through increased photorespiration, heat dissipation, chlorophyll fluorescence. Our results suggest that H. hamabo is more tolerant to tidal immersion than M. cerifera, and therefore it is better adapted to the anticipated sea level rise in future. (C) 2013 Elsevier Ltd. All rights reserved.