Autumnal leaf abscission of sugar maple is not delayed by atmospheric CO2 enrichment

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Autumnal leaf abscission of sugar maple is not delayed by atmospheric CO2 enrichment
	Li, L.; Wang, X. K.; Manning, W. J.
刊名	PHOTOSYNTHETICA
	2018-01-12
卷号	56 期号:4 页码:1134-1139
关键词	autumnal leaf phenology biomass elevated CO2 growth late-season net photosynthesis
ISSN号	0300-3604
文献子类	Article
英文摘要	To investigate the effects of atmospheric CO2 enrichment on physiology and autumnal leaf phenology, we exposed 3-year-old sugar maple (Acer saccharum Marsh.) seedlings to 800 (A8), 600 (A6), and 400 mu L(CO2) L-1 (AA) in nine continuous stirred tank reactor (CSTR) chambers during the growing season of 2014. Leaf abscission timing, abscised leaf area percentages, leaf number, light-saturated net photosynthetic rate (P (Nmax)), leaf area, accumulative growth rates, and biomass were determined and assessed. The results suggested the following: (1) no significant differences were found in the timing of leaf abscission in the three CO2-concentration treatments; (2) P (Nmax) was continuously stimulated to the greatest extent in A8 at 319% and 160% in A6 until the end of the growing season, respectively; and (3) leaf number, leaf area, and accumulative height growth all significantly increased by elevated CO2, which led to a 323% increase in A8 biomass and 235% in A6 biomass after 156-d fumigation. In summary, the results suggest, the timing of leaf abscission of sugar maple in fall was not modified by CO2 enrichment, the increased carbon gain by elevated CO2 was mainly due to increased leaf area, more leaves, and the continuously enhanced high photosynthesis throughout the growing season instead of the leaf life span.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40473]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Li, L.,Wang, X. K.,Manning, W. J.. Autumnal leaf abscission of sugar maple is not delayed by atmospheric CO2 enrichment[J]. PHOTOSYNTHETICA,2018,56(4):1134-1139.
APA	Li, L.,Wang, X. K.,&Manning, W. J..(2018).Autumnal leaf abscission of sugar maple is not delayed by atmospheric CO2 enrichment.PHOTOSYNTHETICA,56(4),1134-1139.
MLA	Li, L.,et al."Autumnal leaf abscission of sugar maple is not delayed by atmospheric CO2 enrichment".PHOTOSYNTHETICA 56.4(2018):1134-1139.