气候变化领域集成服务门户(CCPortal): Multifeature analyses of vascular cambial cells reveal longevity mechanisms in old Ginkgo biloba trees

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DOI	10.1073/pnas.1916548117
	Multifeature analyses of vascular cambial cells reveal longevity mechanisms in old Ginkgo biloba trees
	Wang, Li; Cui, Jiawen; Jin, Biao; Zhao, Jianguo; Xu, Huimin; Lu, Zhaogeng; Li, Weixing; Li, Xiaoxia; Li, Linling; Liang, Eryuan; Rao, Xiaolan; Wang, Shufang; Fu, Chunxiang; Cao, Fuliang; Dixon, Richard A.; Lin, Jinxing
通讯作者	Dixon, RA ; Lin, JX (通讯作者)
发表日期	2020
ISSN	0027-8424
起始页码	2201
结束页码	2210
卷号	117 期号:4
英文摘要	Aging is a universal property of multicellular organisms. Although some tree species can live for centuries or millennia, the molecular and metabolic mechanisms underlying their longevity are unclear. To address this, we investigated age-related changes in the vascular cambium from 15- to 667-y-old Ginkgo biloba trees. The ring width decreased sharply during the first 100 to 200 y, with only a slight change after 200 y of age, accompanied by decreasing numbers of cambial cell layers. In contrast, average basal area increment (BAI) continuously increased with aging, showing that the lateral menstem can retain indeterminacy in old trees. The indole-3-acetic acid (IAA) concentration in cambial cells decreased with age, whereas the content of abscisic acid (ABA) increased significantly. In addition, cell division-, cell expansion-, and differentiation-related genes exhibited significantly lower expression in old trees, especially miR166 and HD-ZIP III interaction networks involved in cambial activity. Disease resistance-associated genes retained high expression in old trees, along with genes associated with synthesis of preformed protective secondary metabolites. Comprehensive evaluation of the expression of genes related to autophagy, senescence, and age-related miRNAs, together with analysis of leaf photosynthetic efficiencies and seed germination rates, demonstrated that the old trees are still in a healthy, mature state, and senescence is not manifested at the whole-plant level. Taken together, our results reveal that long-lived trees have evolved compensatory mechanisms to maintain a balance between growth and aging processes. This involves continued cambial divisions, high expression of resistance-associated genes, and continued synthetic capacity of preformed protective secondary metabolites.
关键词	LEAF SENESCENCE RADIAL GROWTH WOOD REGULATORS RESPONSES GENOME DEATH FIR
英文关键词	aging; cambium; Ginkgo biloba; old trees; senescence
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000509791700052
来源期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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/260058
推荐引用方式 GB/T 7714	Wang, Li,Cui, Jiawen,Jin, Biao,et al. Multifeature analyses of vascular cambial cells reveal longevity mechanisms in old Ginkgo biloba trees[J]. 中国科学院青藏高原研究所,2020,117(4).
APA	Wang, Li.,Cui, Jiawen.,Jin, Biao.,Zhao, Jianguo.,Xu, Huimin.,...&Lin, Jinxing.(2020).Multifeature analyses of vascular cambial cells reveal longevity mechanisms in old Ginkgo biloba trees.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(4).
MLA	Wang, Li,et al."Multifeature analyses of vascular cambial cells reveal longevity mechanisms in old Ginkgo biloba trees".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.4(2020).