干旱区生态环境知识资源中心(Arid): Environmental Drivers for Cambial Reactivation of Qilian Junipers (Juniperus przewalskii) in a Semi-Arid Region of Northwestern China

Arid

DOI	10.3390/atmos11030232
	Environmental Drivers for Cambial Reactivation of Qilian Junipers (Juniperus przewalskii) in a Semi-Arid Region of Northwestern China
	Zeng, Qiao 1,2,3; Rossi, Sergio 4,5; Yang, Bao1 ; Qin, Chun 1,3; Li, Gang 6
通讯作者	Yang, Bao
来源期刊	ATMOSPHERE
EISSN	2073-4433
出版年	2020
卷号	11 期号:3
英文摘要	Although cambial reactivation is considered to be strongly dependent on temperature, the importance of water availability at the onset of xylogenesis in semi-arid regions still lacks sufficient evidences. In order to explore how environmental factors influence the initiation of cambial activity and wood formation, we monitored weekly cambial phenology in Qilian juniper (Juniperus przewalskii) from a semi-arid high-elevation region of northwestern China. We collected microcores from 12 trees at two elevations during the growing seasons in 2013 and 2014, testing the hypothesis that rainfall limits cambial reactivation in spring. Cambium was reactivated from late April to mid-May, and completed cell division from late July to early August, lasting 70-100 days. Both sites suffered from severe drought from January to April 2013, receiving < 1 mm of rain in April. In contrast, rainfall from January to April 2014 was 5-6 times higher than that in 2013. However, cambial reactivation in 2014 was delayed by 10 days. In spring, soil moisture gradually increased with warming temperatures, reaching 0.15 m(3)/m(3) before the onset of xylogenesis, which may have ensured water availability for tree growth during the rainless period. We were unable to confirm the hypothesis that rainfall is a limiting factor of cambial reactivation. Our results highlight the importance of soil moisture in semi-arid regions, which better describe the environmental conditions that are favorable for cambial reactivation in water-limited ecosystems.
英文关键词	cambial activity Juniperus przewalskii rainfall temperature soil moisture xylogenesis
类型	Article
语种	英语
国家	Peoples R China ; Canada
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000524490500031
WOS关键词	WOOD FORMATION ; ABIES-BALSAMEA ; SPRING GROWTH ; PHENOLOGY ; XYLOGENESIS ; TREE ; ONSET ; TEMPERATURES ; CONIFERS ; RECONSTRUCTION
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314128
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China; 2.Guangzhou Inst Geog, Guangdong Open Lab Geospatial Informat Technol &, Key Lab Guangdong Utilizat Remote Sensing & Geog, Guangzhou 510070, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Univ Quebec Chicoutimi, Dept Sci Fondamentales, Chicoutimi, PQ G7H 2B1, Canada; 5.Chinese Acad Sci, South China Bot Garden, Guangdong Prov Key Lab Appl Bot, Key Lab Vegetat Restorat & Management Degraded Ec, Guangzhou 510650, Peoples R China; 6.Dongdashan Nat Reserve, Ganzhou Dist 734000, Zhangye, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Qiao,Rossi, Sergio,Yang, Bao,et al. Environmental Drivers for Cambial Reactivation of Qilian Junipers (Juniperus przewalskii) in a Semi-Arid Region of Northwestern China[J],2020,11(3).
APA	Zeng, Qiao,Rossi, Sergio,Yang, Bao,Qin, Chun,&Li, Gang.(2020).Environmental Drivers for Cambial Reactivation of Qilian Junipers (Juniperus przewalskii) in a Semi-Arid Region of Northwestern China.ATMOSPHERE,11(3).
MLA	Zeng, Qiao,et al."Environmental Drivers for Cambial Reactivation of Qilian Junipers (Juniperus przewalskii) in a Semi-Arid Region of Northwestern China".ATMOSPHERE 11.3(2020).