Enhanced utilization of organic phosphorus in a marine diatom Thalassiosira weissflogii: A possible mechanism for aluminum effect under P limitation

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	Enhanced utilization of organic phosphorus in a marine diatom Thalassiosira weissflogii: A possible mechanism for aluminum effect under P limitation
	Zhou, Linbin; Tan, Yehui; Huang, Liangming; Wang, Wen-Xiong
刊名	JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
	2016
卷号	478 页码:77-85
关键词	Phytoplankton Aluminum Dissolved organic phosphorus Alkaline phosphatase activity Thalassiosira weissflogii Carbon cycling
通讯作者	Wang, WX (reprint author), Hong Kong Univ Sci & Technol, Div Life Sci, Kowloon, Hong Kong, Peoples R China.
中文摘要	Although many studies have reported the aluminum (Al) impacts on freshwater organisms and terrestrial plants in acidic and neutral pH media, little information is available on the effects of Al on organisms in the alkaline seawater. In this study, the Al effects on marine phytoplankton were investigated by growing the axenic diatom Thalassiosira weissflogii in seawater media amended with varied nutrient levels. Under phosphorus (P) limited conditions, Al enrichment resulted in an enhanced diatom growth and higher biomass accumulation, as well as the maintenance of high diatom biomass during the stationary phase. The diatom displayed higher cellular alkaline phosphatase activity (APA) under Al-enriched and P-limited conditions, which was responsible for the increased uptake of dissolved organic phosphorus (DOP). Lower dissolved APA was observed in the Al-enriched culture. In contrast, Al addition did not change the phosphate speciation in seawater or the diatom uptake of dissolved inorganic P (DIP) at low concentration, but instead made the diatoms uncompetitive under high DIP conditions. The results strongly indicated that Al treatment increased the proportion of the diatom cellular APA and their utilization efficiency of DOP, which may partly account for the beneficial effects of Al on the diatom under P-limited conditions. It is thus likely that Al may influence the ocean carbon cycling by promoting the phytoplankton utilization of DOP. (C) 2016 Elsevier B.V. All rights reserved.
学科主题	Environmental Sciences & Ecology; Marine & Freshwater Biology
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15424]
专题	南海海洋研究所_中科院海洋生物资源可持续利用重点实验室
推荐引用方式 GB/T 7714	Zhou, Linbin,Tan, Yehui,Huang, Liangming,et al. Enhanced utilization of organic phosphorus in a marine diatom Thalassiosira weissflogii: A possible mechanism for aluminum effect under P limitation[J]. JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY,2016,478:77-85.
APA	Zhou, Linbin,Tan, Yehui,Huang, Liangming,&Wang, Wen-Xiong.(2016).Enhanced utilization of organic phosphorus in a marine diatom Thalassiosira weissflogii: A possible mechanism for aluminum effect under P limitation.JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY,478,77-85.
MLA	Zhou, Linbin,et al."Enhanced utilization of organic phosphorus in a marine diatom Thalassiosira weissflogii: A possible mechanism for aluminum effect under P limitation".JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY 478(2016):77-85.