Responses of Autumn Phenology to Climate Change and the Correlations of Plant Hormone Regulation

doi:10.1038/s41598-020-65704-8

	Responses of Autumn Phenology to Climate Change and the Correlations of Plant Hormone Regulation
	Zhang, Shixi; Dai, Junhu; Ge, Quansheng
刊名	SCIENTIFIC REPORTS
	2020-06-03
卷号	10 期号:1 页码:10
ISSN号	2045-2322
DOI	10.1038/s41598-020-65704-8
通讯作者	Ge, Quansheng(geqs@igsnrr.ac.cn)
英文摘要	Current understanding of autumn phenological responses to climate change in deciduous tree species remains limited, mainly due to the difficulties in defining autumn events and the lack of knowledge about its mechanism. Here we applied a method based on measuring chlorophyll A (Chla) content in leaf tissue during the entire autumn senescence processes to appropriately quantify autumn phenological processes. Beginning of leaf coloring could be defined as when about 50% of the Chl was lost. End of leaf coloring could be defined as when about 95% of the Chl was lost. Then the mechanism behind the timing of autumn senescence responses to climate change through hormone regulation was studied for the first time. Four dominate deciduous tree species with representative senescence type (Salix babylonica, Ginkgo biloba, Acer mono, Cotinus coggygria) were chosen as the subject of study. Variations in climate factors (temperature, day length, precipitation, humidity) were recorded and nine major endogenous hormones (IAA, IPA, ZR, DHZR, GA(3), GA(4), ABA, MeJA, BR) in leaf tissues were monitored during the entire autumn senescence processes. The experimental results verified temperature and day length are the major climate factors affecting autumn phenology. Low temperature and short day length could result in the decrease of ZR level and the increase of ABA level in leaf tissue, which directly trigger/ promote senescence. Meanwhile, low temperature and short day length could cause the decrease of MeJA level and the increase of GA(3) and GA(4) level, which regulate the timing of autumn senescence indirectly through ZR, ABA, and IAA. Our study improves the understanding of autumn phenological response to climate change in deciduous trees.
资助项目	Strategic Priority Research Program[XDA19040301] ; Chinese Academy of Sciences (CAS) ; National Key R&D Program of China[2018YFA0606102]
WOS关键词	LEAF SENESCENCE ; STRESS ; WEATHER ; AUXIN
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000543961800016
资助机构	Strategic Priority Research Program ; Chinese Academy of Sciences (CAS) ; National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162384]
专题	中国科学院地理科学与资源研究所
通讯作者	Ge, Quansheng
作者单位	Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Shixi,Dai, Junhu,Ge, Quansheng. Responses of Autumn Phenology to Climate Change and the Correlations of Plant Hormone Regulation[J]. SCIENTIFIC REPORTS,2020,10(1):10.
APA	Zhang, Shixi,Dai, Junhu,&Ge, Quansheng.(2020).Responses of Autumn Phenology to Climate Change and the Correlations of Plant Hormone Regulation.SCIENTIFIC REPORTS,10(1),10.
MLA	Zhang, Shixi,et al."Responses of Autumn Phenology to Climate Change and the Correlations of Plant Hormone Regulation".SCIENTIFIC REPORTS 10.1(2020):10.