文献类型：期刊文献

英文题名：Carbohydrate saving or biomass maintenance: which is the main determinant of the plant's long-term submergence tolerance?

作者：Li, Zhaojia[1,2] Zhang, Mengmeng[3] Chow, Wah Soon[4] Chen, Fangqing[5] Xie, Zongqiang[6] Fan, Dayong[1,4]

第一作者：Li, Zhaojia;李兆佳

通信作者：Fan, DY[1];Fan, DY[2]

机构：[1]Beijing Forestry Univ, Coll Forestry, Beijing 100083, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Key Lab State Forestry Adm Trop Forestry Res, Guangzhou 510520, Peoples R China;[3]Heilongjiang Univ, Coll Life Sci, Haerbin 150080, Peoples R China;[4]Australian Natl Univ, Div Plant Sci, Res Sch Biol, Acton, ACT 2601, Australia;[5]China Three Gorges Univ, Coll Chem & Life Sci, Yichang 443000, Hubei, Peoples R China;[6]Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China

年份：2021

卷号：149

期号：1-2

起止页码：155-170

外文期刊名：PHOTOSYNTHESIS RESEARCH

收录：;Scopus(收录号：2-s2.0-85094635619);WOS:【SCI-EXPANDED(收录号:WOS:000583781100001)】；

基金：The support of this work by Grants of NSF of China (Nos. 31870430, 31370424), Basic Work of Science and Technology of China (Vegetation Record of China) (2015FY210200), Basic Scientific Research Fund of Heilongjiang Provincial Universities (RCCXYJ201908) are gratefully acknowledged.

语种：英文

外文关键词：Carbohydrate; Biomass loss; Winter submergence; Post-hypoxia; Riparian ecosystem

摘要：It is hypothesized that plant submergence tolerance could be assessed from the decline of plant biomass due to submergence, as biomass integrates all eco-physiological processes leading to fitness. An alternative hypothesis stated that the consumption rate of carbohydrate is essential in differing tolerance to submergence. In the present study, the responses of biomass, biomass allocation, and carbohydrate content to simulated long-term winter submergence were assessed in four tolerant and four sensitive perennials. The four tolerant perennials occur in a newly established riparian ecosystem created by The Three Gorges Dam, China. They had 100% survival after 120 days' simulated submergence, and had full photosynthesis recovery after 30 days' re-aeration, and the photosynthetic rate was positively related to the growth during the recovery period. Tolerant perennials were characterized by higher carbohydrate levels, compared with the four sensitive perennials (0% survival) at the end of submergence. Additionally, by using a method which simulates posterior estimates, and bootstraps the confidence interval for the difference between strata means, it was found that the biomass response to post-hypoxia, rather than that to submergence, could be a reliable indicator to assess submergence tolerance. Interestingly, the differences of changes in carbohydrate content between tolerant and sensitive perennials during submergence were significant, which were distinct from the biomass response, supporting the hypothesis that tolerant perennials could sacrifice non-vital components of biomass to prioritize the saving of carbohydrates for later recovery. Our study provides some insight into the underlying mechanism(s) of perennials' tolerance to submergence in ecosystems such as temperate wetland and reservoir riparian.