The relationship between leaf and ecosystem CO2 exchanges in a maize field

doi:10.1007/s11738-018-2732-6

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	The relationship between leaf and ecosystem CO2 exchanges in a maize field
	Xu, Zhenzhu ; Zhou, Guangsheng 1; Han, Guangxuan 2; Li, Yijun 3
刊名	ACTA PHYSIOLOGIAE PLANTARUM
	2018
卷号	40 期号:8
关键词	Eddy covariance Leaf photosynthetic rate Canopy Net CO2 ecosystem exchange Photosynthetic quantum yield Photosystem II photochemistry Upscaling
ISSN号	0137-5881
DOI	10.1007/s11738-018-2732-6
文献子类	Article
英文摘要	The relationship between leaf photosynthetic rate (A) in a vegetation canopy and the net ecosystem CO2 exchange (NEE) over an entire ecosystem is not well understood. The aim of the present study is to assess the coordinated changes in NEE derived with eddy covariance, A measured in leaf cuvette, and their associations in a rainfed maize field. The light response-curves were estimated for the carbon assimilation rate at both the leaf and ecosystem scales. NEE and A synchronically changed throughout the day and were greater around noon and persisted longer during rapid growth periods. The leaf A had a similar pattern of daytime changes in the top, middle, and bottom leaves. Only severe leaf ageing led to a significant decline in the maximum efficiency of photosystem II (PSII) photochemistry. The greater maximum NEE was associated with a higher ecosystem quantum yield. NEE was positively and significantly correlated with the leaf A averaged based on the vertical distribution of leaf area. The finding highlights the feasibility of assessing NEE by leaf CO2 exchange because of most of experimental data obtained with leaf cuvette methods; and also implies that simultaneously enhancing leaf photosynthetic rate, electron transport rate, net carbon assimilation at whole ecosystem might play a critical role for the enhancement of crop productivity.
学科主题	Plant Sciences
电子版国际标准刊号	1861-1664
出版地	HEIDELBERG
WOS关键词	CARBON-DIOXIDE EXCHANGE ; EDDY COVARIANCE MEASUREMENTS ; LIGHT RESPONSE CURVE ; ZEA-MAYS L ; GAS-EXCHANGE ; CHLOROPHYLL FLUORESCENCE ; USE EFFICIENCY ; WATER-VAPOR ; PHOTOSYNTHETIC ACCLIMATION ; CANOPY PHOTOSYNTHESIS
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000440491000002
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41330531] ; China Special Fund for Meteorological Research in the Public Interest [GYHY201506001-3, GYHY201506019]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/20370]
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 2.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China 3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai, Peoples R China 4.Natl Meteorol Ctr China, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xu, Zhenzhu,Zhou, Guangsheng,Han, Guangxuan,et al. The relationship between leaf and ecosystem CO2 exchanges in a maize field[J]. ACTA PHYSIOLOGIAE PLANTARUM,2018,40(8).
APA	Xu, Zhenzhu,Zhou, Guangsheng,Han, Guangxuan,&Li, Yijun.(2018).The relationship between leaf and ecosystem CO2 exchanges in a maize field.ACTA PHYSIOLOGIAE PLANTARUM,40(8).
MLA	Xu, Zhenzhu,et al."The relationship between leaf and ecosystem CO2 exchanges in a maize field".ACTA PHYSIOLOGIAE PLANTARUM 40.8(2018).