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DOI	10.1002/ajb2.1360
	The onset of xylogenesis in Smith fir is not related to outer bark thickness
	Li, Xiaoxia; Rossi, Sergio; Long, Eryuan
通讯作者	Long, EY (通讯作者)
发表日期	2019
ISSN	0002-9122
EISSN	1537-2197
起始页码	1386
结束页码	1391
卷号	106 期号:10
英文摘要	Premise The resumption of stem growth varies across the ontogenetic development of trees. Compared with younger trees, older ones have thicker outer bark with a temperature-insulating effect that could potentially prevent the stem from warming in the spring. However, the question of whether xylogenesis in old trees is influenced by the thick bark still remains unresolved. Methods We investigated the onset of xylogenesis across the ontogenetic development of Smith fir (Abies georgei var. smithii) trees in the Sygera Mountains, southeastern Tibetan Plateau. The outer bark of older trees was also removed. Xylogenesis was monitored in microcores we collected every 3 days during May and June in 2017. Results Xylogenesis began in late May in young (<50 yr) and mature (50-100 yr) trees, 1 week earlier than in adult (>100-150 yr) and old (>150-200 yr) trees. Older (>200 yr) trees had the latest onset of xylogenesis, 2 weeks after young trees. The resumption of xylogenesis was similar between the control and bark-removed trees. Conclusions Growth resumption was delayed in older and bigger trees. Outer bark did not affect the onset of xylogenesis, which indicated that the delayed resumption of growth during the lifespan of trees could be more related to endogenous factors than to an insulating effect of the thick bark of older individuals.
关键词	WOOD FORMATION CAMBIAL ACTIVITY SEASONAL DYNAMICS SILVER-FIR XYLEM PHENOLOGY PHLOEM FOREST TEMPERATURE CONIFERS
英文关键词	cambium; cell differentiation; dendroecology; manipulative experiment; ontogeny; secondary phloem; subalpine forest; tree ring; wood formation; xylem growth
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000489954400001
来源期刊	AMERICAN JOURNAL OF BOTANY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259463
推荐引用方式 GB/T 7714	Li, Xiaoxia,Rossi, Sergio,Long, Eryuan. The onset of xylogenesis in Smith fir is not related to outer bark thickness[J]. 中国科学院青藏高原研究所,2019,106(10).
APA	Li, Xiaoxia,Rossi, Sergio,&Long, Eryuan.(2019).The onset of xylogenesis in Smith fir is not related to outer bark thickness.AMERICAN JOURNAL OF BOTANY,106(10).
MLA	Li, Xiaoxia,et al."The onset of xylogenesis in Smith fir is not related to outer bark thickness".AMERICAN JOURNAL OF BOTANY 106.10(2019).