气候变化领域集成服务门户(CCPortal): Tracheid development under a drought event producing intra-annual density fluctuations in the semi-arid China

CCPortal

DOI	10.1016/j.agrformet.2021.108572
	Tracheid development under a drought event producing intra-annual density fluctuations in the semi-arid China
	Gao, Jiani; Yang, Bao; Peng, Xiaomei; Rossi, Sergio
通讯作者	Yang, B (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0168-1923
EISSN	1873-2240
卷号	308
英文摘要	Drought is the primary limiting factor for tree growth in arid and semi-arid regions, where it can greatly influence xylem anatomical traits and induce multiple responses to wood development. However, the mechanisms driving xylogenesis and intra-annual density fluctuations (IADFs), as well as the seasonal dynamics of wood development in water-limited environments, are still unclear. In this study, we assessed the kinetics of xylem development weekly in Chinese pine (Pinus tabuliformis) and Qinghai spruce (Picea crassifolia), at two altitudes in the Helan Mountains, semi-arid China. Results indicate that summer drought in June inhibited cambial division and reduced xylogenesis, resulting in only 40% of the xylem developing before August. The onset of abundant precipitation in mid-July reactivated radial growth. This second growth extended the growing season by one month and partly compensated for the negative effect of the drought on growth. E-type IADF were characterized by narrow cells with thick walls, formed during July and early August. The duration of cell enlargement explained 57% of variance in tracheid diameter, showing that it played an important role in determining cell size. In contrast, changes in the cell wall thickness were mainly driven by the rate of secondary wall thickening, which explained 65% of the variance. This study reveals the potential mechanisms for xylem development and E-IADF formation under summer drought in semi-arid China, provides evidence for the plasticity and resistance of Chinese pine and Qinghai spruce under varying environmental conditions, and contributes to our understanding of likely future trends in forest productivity under climate changes.
关键词	TREE-RING WIDTH WOOD FORMATION PINUS-PINASTER CAMBIAL ACTIVITY ABIES-BALSAMEA FALSE RINGS GROWTH WATER XYLOGENESIS PINEA
英文关键词	Conifer; Tree ring structure; Xylem phenology; Xylogenesis; Cell enlargement; Secondary wall thickening
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000692679900034
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254159
作者单位	[Gao, Jiani; Yang, Bao; Peng, Xiaomei] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China; [Gao, Jiani] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Yang, Bao] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Yang, Bao] Acad Plateau Sci & Sustainabil, Qinghai Res Ctr Qilian Mt Natl Pk, Xining 810008, Peoples R China; [Yang, Bao] Qinghai Normal Univ, Xining 810008, Peoples R China; [Rossi, Sergio] Univ Quebec Chicoutimi, Dept Sci Fondamentales, 555 Blvd Univ, Chicoutimi, PQ G7H 2B1, Canada; [Rossi, Sergio] Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou 510650, Peoples R China
推荐引用方式 GB/T 7714	Gao, Jiani,Yang, Bao,Peng, Xiaomei,et al. Tracheid development under a drought event producing intra-annual density fluctuations in the semi-arid China[J]. 中国科学院西北生态环境资源研究院,2021,308.
APA	Gao, Jiani,Yang, Bao,Peng, Xiaomei,&Rossi, Sergio.(2021).Tracheid development under a drought event producing intra-annual density fluctuations in the semi-arid China.AGRICULTURAL AND FOREST METEOROLOGY,308.
MLA	Gao, Jiani,et al."Tracheid development under a drought event producing intra-annual density fluctuations in the semi-arid China".AGRICULTURAL AND FOREST METEOROLOGY 308(2021).