Dynamic changes in leaf wax n-alkanes and delta C-13 during leaf development in winter wheat under varied irrigation experiments

doi:10.1016/j.orggeochem.2020.104054

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	Dynamic changes in leaf wax n-alkanes and delta C-13 during leaf development in winter wheat under varied irrigation experiments
	Jiang, Hanbing 3; Feakins, Sarah J.; Sun, Hongyong ; Feng, Xiaojuan 4; Zhang, Xiying ; Liu, Xiuwei
刊名	ORGANIC GEOCHEMISTRY
	2020
卷号	146
关键词	n-alkanes Carbon isotope Leaf development Drought stress Water use efficiency Winter wheat
ISSN号	0146-6380
DOI	10.1016/j.orggeochem.2020.104054
文献子类	Article
英文摘要	Leaf wax n-alkanes serve as biomarkers that record environmental information with their carbon isotopic composition (delta C-13(alk)) recording water availability. Agricultural and paleoclimate applications would benefit from a greater understanding of how water shortages are recorded in delta C-13(alk) across the growing season, and controlled experiments can contribute to understanding as they constrain cause and effect, although they represent highly simplified versions of natural ecosystems. In this study, we use fieldgrown winter wheat (Triticum aestivum L.) under three water treatments (full irrigation, deficit irrigation and dry/rain-fed) to investigate the changes of flag (top) leaf traits including leaf mass per area, wax nalkanes and carbon composition of bulk leaf and n-alkanes (delta C-13(alk)) during leaf development. We find that leaf wax n-alkane synthesis ceases when the leaf reaches its maximum area (fully expanded) under dry conditions. However, fully expanded leaves can still increase their n-alkane concentrations by 42% and 70% under deficit and full irrigation, respectively. Total leaf wax n-alkane concentrations and delta C-13(alk) show no difference at leaf flush between rain-fed (dry) and deficit irrigation treatments, but delta C-13(alk) under full irrigation is more depleted as expected, with more pronounced offsets between the experiments developing during the growing season. delta C-13(alk) decreases logarithmically during leaf development perhaps indicating a shift from stored carbohydrate to fresh photosynthate and shoot growth related responses. Our results indicate that the water information at leaf flush is not `locked-in' to the delta C-13(alk) signal carried by the leaf wax n-alkanes. Instead, the first flush likely reflects the signal of stored carbohydrate more so than ambient environmental conditions. Total leaf wax n-alkane concentrations and delta C-13(alk) at the mature stage carry a more complete record of differences in water use efficiency experienced during the growing season. (C) 2020 Elsevier Ltd. All rights reserved.
学科主题	Geochemistry & Geophysics
电子版国际标准刊号	1873-5290
出版地	OXFORD
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; WATER-USE EFFICIENCY ; D VALUES ; CHEMICAL-COMPOSITION ; SEASONAL-VARIATION ; MODERN ANGIOSPERMS ; HYDROGEN ISOTOPES ; CUTICULAR WAXES ; GRAIN-YIELD ; C-3 PLANTS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000546214000002
资助机构	International Cooperation Project of MOST [2017YEE0130500] ; Key Research and Development Program of Hebei province [19227004D] ; Hundred Talent Program of the Chinese Academy of SciencesChinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/21693]
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Agr Water Resources, Ctr Agr Resources Res, Inst Genet & Dev Biol,Innovat Acad Seed Design, 286 Huaizhong Rd, Shijiazhuang 050021, Hebei, Peoples R China 2.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China 3.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, 20 Nanxincun, Beijing 100093, Peoples R China 4.Feakins, Sarah J.] Univ Southern Calif, Dept Earth Sci, 3651 Trousdale Pkwy, Los Angeles, CA 90089 USA
推荐引用方式 GB/T 7714	Jiang, Hanbing,Feakins, Sarah J.,Sun, Hongyong,et al. Dynamic changes in leaf wax n-alkanes and delta C-13 during leaf development in winter wheat under varied irrigation experiments[J]. ORGANIC GEOCHEMISTRY,2020,146.
APA	Jiang, Hanbing,Feakins, Sarah J.,Sun, Hongyong,Feng, Xiaojuan,Zhang, Xiying,&Liu, Xiuwei.(2020).Dynamic changes in leaf wax n-alkanes and delta C-13 during leaf development in winter wheat under varied irrigation experiments.ORGANIC GEOCHEMISTRY,146.
MLA	Jiang, Hanbing,et al."Dynamic changes in leaf wax n-alkanes and delta C-13 during leaf development in winter wheat under varied irrigation experiments".ORGANIC GEOCHEMISTRY 146(2020).