文献类型：期刊文献

英文题名：Submergence Causes Similar Carbohydrate Starvation but Faster Post-Stress Recovery than Darkness in Alternanthera philoxeroides Plants

作者：Ye, Xiao Qi[1,2] Meng, Jin Liu[1] Zeng, Bo[2] Wu, Ming[1] Zhang, Ye Yi[2] Zhang, Xiao Ping[2]

第一作者：叶小齐;Ye, Xiao Qi

通信作者：Zeng, B[1]

机构：[1]Natl Forestry Bur, Chinese Acad Forestry, Inst Subtrop Forestry, Res Stn Hangzhou Bay Wetlands Ecosyst, Fuyang, Peoples R China;[2]Southwest Univ, Sch Life Sci, Key Lab Ecoenvironm Three Gorges Reservoir Reg,Mi, Chongqing Key Lab Plant Ecol & Resources Three Go, Chongqing, Peoples R China

年份：2016

卷号：11

期号：10

外文期刊名：PLOS ONE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000389009200046)】；

基金：This work was supported by the National Natural Science Foundation of China (http://www.nsfc.gov.cn/, grant numbers 31400480, 31370443 and 31070474 to BZ and 31400378 to XQY). The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript

语种：英文

摘要：Carbon assimilation by submerged plants is greatly reduced due to low light levels. It is hypothesized that submergence reduces carbohydrate contents and that plants recover from submergence in the same way as darkness-treated plants. To test this hypothesis, the responses of plants to submergence and darkness were studied and compared. Plants of a submergence-tolerant species, Alternanthera philoxeroides, were exposed to well drained and illuminated conditions, complete submergence conditions or darkness conditions followed by a recovery growth period in a controlled experiment. The biomass maintenance and accumulation, carbohydrate content dynamics and respiration rate in the plants were assessed to quantify the carbohydrate utilization rate and regrowth. The submerged plants maintained higher chlorophyll contents, more green leaf tissue and more biomass; recovered more quickly; and accumulated more carbohydrates and biomass than darkness-treated plants. The respiration rate was continuously reduced in the same pattern under both stress conditions but was maintained at a significantly lower level in the submerged plants; the total soluble sugar and total fructan contents were decreased at approximately the same rate of decrease, reaching similar low levels, in the two stress treatments. The A. philoxeroides plants were more tolerant of submergence than darkness. The faster recovery of desubmerged plants could not be explained by the similar carbohydrate contents at the start of recovery. Other types of carbon reserves besides carbohydrates or other mechanisms such as higher post-stress photosynthetic performance might be involved.