干旱区生态环境知识资源中心(Arid): Drought responses and carbon allocation strategies of poplar with different leaf maturity

Arid

DOI	10.1111/ppl.14224
	Drought responses and carbon allocation strategies of poplar with different leaf maturity
	Yao, Yuan; Xia, Linchao; Yang, Le; Liu, Ruixuan; Zhang, Sheng
通讯作者	Zhang, S
来源期刊	PHYSIOLOGIA PLANTARUM
ISSN	0031-9317
EISSN	1399-3054
出版年	2024
卷号	176 期号:1
英文摘要	Leaf characteristics can reflect the adaptation of trees to drought stress. However, the effect of leaf maturity on drought stress has been neglected, leading to uncertainty in inferring individual tree responses to drought from leaves. The allocation strategy of photosynthetic carbon between leaf organs (fully expanded young and old leaves) under drought stress remains unclear. Poplar is a diverse and widespread tree species in arid and semi-arid regions. Here, three poplar genotypes (Populus cathayana, P. x euramericana 'Nanlin 895', and P. alba x P. tremula var. glandulosa) were selected and exposed to different watering regimes. The responses and carbon allocation strategies of leaves with different maturity to drought were investigated using a combination of leaf traits and 13C pulse labelling technique. The results showed that (1) fully expanded young leaves had better osmotic regulation and antioxidant capacity than aged leaves under drought stress. (2) Aged leaves acted as a carbon source during water deficit, where their photosynthetic products were transferred and supplied to upper young leaves to promote stronger photosynthesis in young leaves to acquire resources for tree growth. This study highlights that the effect of leaf maturity should be considered in the future when investigating the effects of drought on woody plants, especially for continuously growing tree species. Therefore, our study not only demonstrates the existence of leaf-age-dependent responses to drought in poplar but also provides new insights into carbon allocation at the leaf level. image
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001177436600005
WOS关键词	OSMOTIC ADJUSTMENT ; TEMPERATE FOREST ; DYNAMICS ; TREE ; NITROGEN ; AGE ; SENESCENCE ; BIOMASS ; PLANTS ; STRESS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405065
推荐引用方式 GB/T 7714	Yao, Yuan,Xia, Linchao,Yang, Le,et al. Drought responses and carbon allocation strategies of poplar with different leaf maturity[J],2024,176(1).
APA	Yao, Yuan,Xia, Linchao,Yang, Le,Liu, Ruixuan,&Zhang, Sheng.(2024).Drought responses and carbon allocation strategies of poplar with different leaf maturity.PHYSIOLOGIA PLANTARUM,176(1).
MLA	Yao, Yuan,et al."Drought responses and carbon allocation strategies of poplar with different leaf maturity".PHYSIOLOGIA PLANTARUM 176.1(2024).