Light history modulates growth and photosynthetic responses of a diatom to ocean acidification and UV radiation

作     者：Wei Li Tifeng Wang Douglas A.Campbell Kunshan Gao 

作者机构：State Key Laboratory of Marine Environmental Science&College of Ocean and Earth ScienceXiamen UniversityXiamen361005China College of Life and Environmental SciencesHuangshan UniversityHuangshan245041China Co-innovation Center of Jiangsu Marine Bio-industry TechnologyJiangsu Ocean UniversityLianyungang222005China Biology DepartmentMount Allison UniversitySackvilleNBE4L 1G7Canada 

出 版 物：《Marine Life Science & Technology》 (海洋生命科学与技术（英文）)

年 卷 期：2023年第5卷第1期

页      面：116-125页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 071004[理学-水生生物学] 

基　　金：This study was supported by the National Natural Science Foundation of China(41720104005,41721005,41890803) Key Research and Development Program of Anhui Province(202004i07020004) Excellent Youth Scholars Support Program of Anhui Province(gxyq2021212) MEL Visiting Fellowship Program(MELRS2008) Research Platform of Eco-Environmental Protection Research Centre of Xin’an River Basin,Huangshan University(kypt202102) The authors are grateful to the laboratory engineers Xianglan Zeng and Wenyan Zhao for their logistical and technical support 

主　　题：Chlorophyll fluorescence Growth Light intensity Ocean acidification Pigmentations UV radiation 

摘      要：To examine the synergetic effects of ocean acidification(OA)and light intensity on the photosynthetic performance of marine diatoms,the marine centric diatom Thalassiosira weissflogii was cultured under ambient low CO_(2)(LC,390μatm)and elevated high CO_(2)(HC,1000μatm)levels under low-light(LL,60μmol m^(-2)s^(-1))or high-light(HL,220μmol m^(-2)s^(-1))conditions for over 20 *** stimulated the growth rate by 128 and 99%but decreased cell size by 9 and 7%under LC and HC conditions,***,HC did not change the growth rate under LL but decreased it by 9%under *** combined with HC decreased both maximum quantum yield(FV/FM)and effective quantum yield(ΦPSII),measured under either low or high actinic *** exposed to UV radiation(UVR),LL-grown cells were more prone to UVA exposure,with higher UVA and UVR inducing inhibition ofΦPSII compared with HL-grown *** use efficiency(α)and maximum relative electron transport rate(rETRmax)were inhibited more in the HC-grown cells when UVR(UVA and UVB)was present,particularly under *** results indicate that the growth light history influences the cell growth and photosynthetic responses to OA and UVR.