globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13501
论文题名:
Decreased photosynthesis and growth with reduced respiration in the model diatom Phaeodactylum tricornutum grown under elevated CO2 over 1800 generations
作者: Li F.; Beardall J.; Collins S.; Gao K.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:1
起始页码: 127
结束页码: 137
语种: 英语
英文关键词: CO2 ; diatom ; growth ; ocean acidification ; Phaeodactylum tricornutum ; photosynthesis ; respiration
Scopus关键词: acidification ; carbon dioxide ; diatom ; growth response ; photosynthesis ; physiological response ; phytoplankton ; population modeling ; primary production ; respiration ; Bacillariophyta ; Phaeodactylum tricornutum
英文摘要: Studies on the long-term responses of marine phytoplankton to ongoing ocean acidification (OA) are appearing rapidly in the literature. However, only a few of these have investigated diatoms, which is disproportionate to their contribution to global primary production. Here we show that a population of the model diatom Phaeodactylum tricornutum, after growing under elevated CO2 (1000 μatm, HCL, pHT: 7.70) for 1860 generations, showed significant differences in photosynthesis and growth from a population maintained in ambient CO2 and then transferred to elevated CO2 for 20 generations (HC). The HCL population had lower mitochondrial respiration, than did the control population maintained in ambient CO2 (400 μatm, LCL, pHT: 8.02) for 1860 generations. Although the cells had higher respiratory carbon loss within 20 generations under the elevated CO2, being consistent to previous findings, they downregulated their respiration to sustain their growth in longer duration under the OA condition. Responses of phytoplankton to OA may depend on the timescale for which they are exposed due to fluctuations in physiological traits over time. This study provides the first evidence that populations of the model species, P. tricornutum, differ phenotypically from each other after having been grown for differing spans of time under OA conditions, suggesting that long-term changes should be measured to understand responses of primary producers to OA, especially in waters with diatom-dominated phytoplankton assemblages. © 2016 The Authors. Global Change Biology Published by John Wiley & Sons Ltd.
资助项目: This study was supported by National Natural Science Foundation (41430967 ; 41120164007), State Oceanic Administration (SOA, GASI-03-01-02-04), Joint Project of NSFC and Shandong Province (Grant No. U1406403), and Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDA11020302). JB's visit to Xiamen was supported by Xiamen University. SC is supported by a Royal Society (United Kingdom) University Research Fellowship and her visit to Xiamen was supported by MEL. We acknowledge the four anonymous reviewers for their insightful comments on the manuscript.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61114
Appears in Collections:影响、适应和脆弱性

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作者单位: State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China; School of Biological Sciences, Monash University, Clayton, VIC, Australia; Ashworth Laboratories, Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, United Kingdom

Recommended Citation:
Li F.,Beardall J.,Collins S.,et al. Decreased photosynthesis and growth with reduced respiration in the model diatom Phaeodactylum tricornutum grown under elevated CO2 over 1800 generations[J]. Global Change Biology,2017-01-01,23(1)
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