C-41 methyl and C-42 ethyl alkenones are biomarkers for Group II Isochrysidales

doi:10.1016/j.orggeochem.2020.104081

GIG OpenIR

	Liao, Sian 1; Yao, Yuan 2,3; Wang, Li 4; Wang, Karen J.3; Amaral-Zettler, Linda 3,5,6,7; Longo, William M.3; Huang, Yongsong 3
	C-41 methyl and C-42 ethyl alkenones are biomarkers for Group II Isochrysidales
刊名	ORGANIC GEOCHEMISTRY
ISSN号	0146-6380
	2020-09-01
卷号	147 页码:11
DOI	10.1016/j.orggeochem.2020.104081
语种	英语
WOS研究方向	Geochemistry & Geophysics
摘要	Alkenones are polyunsaturated long-chain methyl or ethyl ketones produced by species in the Isochrysidales, an order of haptophyte algae. Based on phylogenetic data, members of the Isochrysidales have been classified into three groups with each group showing significant differences in alkenone profiles and preferred growth environments. Common carbon chain lengths of alkenones range from 37 to 40. Extended C-41 methyl (C41Me) and C-42 ethyl (C42Et) alkenones have been reported in hypersaline lakes in China (Lake Alahake and Lake Balikun), Canada (Lake Snakehole) and marine sediments (e.g., similar to 95 Ma in Blake-Bahama Basin). It is unclear, however, if these extended alkenones are produced by one or more groups of Isochrysidales. Here, we systematically examined alkenones from cultures of Group II (Isochrysis nuda, Isochrysis litoralis, Ruttnera lamellosa, Isochrysis galbana and Tisochrysis lutea) and Group III (Emiliania huxleyi and Gephyrocapsa oceanica) Isochrysidales and environmental samples of Group I Isochysidales. C41Me and C42Et alkenones were found in all Group II species with Isochrysis nuda producing the highest percentages, but not in alkenones produced by Group I nor Group III Isochrysidales. Our results indicate that extended C41Me and C42Et alkenones are specific biomarkers for Group II Isochrysidales. We also report the first temperature calibrations of alkenones for Isochrysis nuda and Isochrysis litoralis using culture experiments, and find temperatures inferred from extended alkenones in Balikun and Alahake surface sediments match warm-season temperatures based on Isochrysis nuda calibrations, which is further corroborated by genomic data indicating the dominance of Isochrysis nuda Isochrysidales. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	C-41 and C-42 alkenones Biomarkers Isochrysidales Culture Evolution 18S rDNA
WOS记录号	WOS:000554921700009
收录类别	SCI
引用统计
文献类型	期刊论文
条目标识符	http://ir.gig.ac.cn/handle/344008/60919
通讯作者	Huang, Yongsong
作者单位	1.Brown Univ, Dept Chem, 324 Brook St, Providence, RI 02912 USA 2.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710054, Peoples R China 3.Brown Univ, Dept Earth Environm & Planetary Sci, 324 Brook St, Providence, RI 02912 USA 4.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 5.NIOZ Royal Netherlands Inst Sea Res, Dept Marine Microbiol & Biogeochem, POB 59, NL-1790 AB Den Burg, Texel, Netherlands 6.Univ Utrecht, POB 59, NL-1790 AB Den Burg, Texel, Netherlands 7.Univ Amsterdam, Dept Freshwater & Marine Ecol, Inst Biodivers & Ecosyst Dynam, Amsterdam, Netherlands
推荐引用方式 GB/T 7714	Liao, Sian,Yao, Yuan,Wang, Li,et al. C-41 methyl and C-42 ethyl alkenones are biomarkers for Group II Isochrysidales[J]. ORGANIC GEOCHEMISTRY,2020,147:11.
APA	Liao, Sian.,Yao, Yuan.,Wang, Li.,Wang, Karen J..,Amaral-Zettler, Linda.,...&Huang, Yongsong.(2020).C-41 methyl and C-42 ethyl alkenones are biomarkers for Group II Isochrysidales.ORGANIC GEOCHEMISTRY,147,11.
MLA	Liao, Sian,et al."C-41 methyl and C-42 ethyl alkenones are biomarkers for Group II Isochrysidales".ORGANIC GEOCHEMISTRY 147(2020):11.