Nitrogen resorption in Acer platanoides and Acer saccharum: influence of light exposure and leaf pigmentation

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Nitrogen resorption in Acer platanoides and Acer saccharum: influence of light exposure and leaf pigmentation
	Duan, Baoli1,2 ; Paquette, Alain 3; Juneau, Philippe 1; Brisson, Jacques 3,4; Fontaine, Bastien 4; Berninger, Frank 1,3
刊名	ACTA PHYSIOLOGIAE PLANTARUM
	2014-11-01
卷号	36 期号:11 页码:3039-3050
关键词	Nitrogen resorption Anthocyanins Chlorophyll Photoprotection
ISSN号	0137-5881
通讯作者	Baoli Duan
英文摘要	We investigated the effects of leaf color change in the fall on photosynthetic production and nitrogen resorption. Seedlings of Acer platanoides L. and A. saccharum Marsh. were grown in a shade house for 5 months in either 21 % (intermediate light, M) or 4.9 % (low light, L) of incident irradiance. After this period, a subset of the intermediate-light grown seedlings was transferred to a high-light stress treatment (H). Gas exchange, chlorophyll fluorescence, pigments, antioxidant activity, and nitrogen (N) resorption were examined at three leaf senescence stages during September and October. Our results show that plants of both species produce more anthocyanins in the H treatment. In comparison with plants grown in the L and M treatments, plants of both species in the H treatments had lower chlorophyll, carotenoid and chlorophyll fluorescence parameters (F (v)/F (m), I broken vertical bar (PSII), NPQ and ETR) at the third sampling date (October 12-18), and indicating higher levels of photoinhibition in the seedlings exposed to high light. Our results imply that autumn leaf redness is inducible and closely linked to photo-oxidative stress. However, anthocyanins did not enhance antioxidant capacity in red leaves in either species, when exposed to high light. For both species, our results showed a higher N-resorption for high-light stressed plants. We also observed that the number of abscised leaves at the second sampling dates (September 10) was higher than at the third sampling dates. The intra-leaf distribution of anthocyanin, the association between anthocyanin production and the high-light environments, the retention of red leaves, the substantial physiological gain of photosynthetic activity, as well as the links between anthocyanins and increased N resorption led us to assume that one primary role of autumn anthocyanin could be to protect the photosynthetic apparatus from photo-oxidative damage as light filters rather than as antioxidant. Another major role is to extend carbon capture and help supply the energy needed for N resorption from senescing leaves in both A. saccharum and A. Platanoides during high-light stress. Nevertheless, photoprotective capacity of anthocyanins was not able to fully compensate for photoinhibitory stress as the anthocyanins are not optimally located to efficiently reduce light within the leaves.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Plant Sciences
研究领域[WOS]	Plant Sciences
关键词[WOS]	PHOTOSYNTHETIC ELECTRON-TRANSPORT ; SUGAR MAPLE LEAVES ; CHLOROPHYLL FLUORESCENCE ; ANTHOCYANIN ACCUMULATION ; NUTRIENT RESORPTION ; CARBON ASSIMILATION ; SENESCING LEAVES ; SENESCENCE ; AUTUMN ; PLANTS
收录类别	SCI
原文出处	http://link.springer.com/article/10.1007/s11738-014-1674-x
语种	英语
WOS记录号	WOS:000343286500019
公开日期	2014-12-02
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/7492]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Univ Quebec, Dept Sci Biol, Montreal, PQ H3C 3P8, Canada 2.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 3.Univ Quebec, CFR, Montreal, PQ H3C 3P8, Canada 4.Univ Montreal, Inst Rech Biol Vegetale, Dept Sci Biol, Montreal, PQ H1X 2B2, Canada
推荐引用方式 GB/T 7714	Duan, Baoli,Paquette, Alain,Juneau, Philippe,et al. Nitrogen resorption in Acer platanoides and Acer saccharum: influence of light exposure and leaf pigmentation[J]. ACTA PHYSIOLOGIAE PLANTARUM,2014,36(11):3039-3050.
APA	Duan, Baoli,Paquette, Alain,Juneau, Philippe,Brisson, Jacques,Fontaine, Bastien,&Berninger, Frank.(2014).Nitrogen resorption in Acer platanoides and Acer saccharum: influence of light exposure and leaf pigmentation.ACTA PHYSIOLOGIAE PLANTARUM,36(11),3039-3050.
MLA	Duan, Baoli,et al."Nitrogen resorption in Acer platanoides and Acer saccharum: influence of light exposure and leaf pigmentation".ACTA PHYSIOLOGIAE PLANTARUM 36.11(2014):3039-3050.