干旱区生态环境知识资源中心(Arid): Wood anatomy of the crown lineages in Proteoideae (Proteaceae): implications for evolution and adaptive value of bordered pits in imperforate tracheary elements

Arid

DOI	10.1093/botlinnean/boab036
	Wood anatomy of the crown lineages in Proteoideae (Proteaceae): implications for evolution and adaptive value of bordered pits in imperforate tracheary elements
	Stepanova, A., V; Akinlabi, F. M.; Sebiloane, K.; Van Wyk, B-E; Oskolski, A. A.
通讯作者	Stepanova, AV (corresponding author)，Univ Johannesburg, Dept Bot & Plant Biotechnol, POB 524, ZA-2006 Johannesburg, South Africa. ; Stepanova, AV (corresponding author)，Komarov Bot Inst, Prof Popov St 2, St Petersburg 197376, Russia.
来源期刊	BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
ISSN	0024-4074
EISSN	1095-8339
出版年	2021
卷号	197 期号:4
英文摘要	As Proteaceae subfamily Proteoideae are richly represented in the Cape Floristic Region of southern Africa and in south-western Australia, it is a convenient group for comparative studies of evolution and adaptation of plants in widely separated areas with a Mediterranean-type climate. Although species of Proteoideae attract considerable attention of researchers, the structural diversity of wood in this group remains under-explored. The wood structure of 51 species of 14 African and Australian genera of Proteoideae (Proteaceae) has been studied. These taxa are uniform in their wood structure; the diversity patterns are more related to plant stature, climatic factors and fire-survival strategies than to the taxonomy or phylogeny of the subfamily. Increases in length and diameter of fibres and diameter of pits in fibre walls are associated with a shift from a semi-arid winter-dry climate to a milder climate with winter rainfall. These trends may imply the transition from non-conducting imperforate tracheary elements to conducting elements in Mediterranean-type climatic regions. This presumable gain of hydraulic function of imperforate tracheary elements could be explained by adaptation to freeze-thaw stress during the late Quaternary, at least in the Cape Region. Vessel grouping shows no correlations with climatic factors. The seeders have a higher vessel frequency and narrower and lower rays than sprouters. We hypothesize that the larger rays in overground stems of sprouters serve as the sites of epicormic buds that provide for resprouting after fire or other damage. The occurrence of sclerified cells and/or irregularly arranged (occasionally circular) tracheary elements in broad rays of some species are thought to be responses to excessive sucrose transport in secondary phloem.
英文关键词	Cape Floristic Region Faurea fynbos kwongan Leucadendreae Petrophileae Protea Proteeae Serruria Western Australia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000741345300001
WOS关键词	CIRCULAR VESSELS ; STARCH DISTRIBUTION ; PLANT DIVERSITY ; WATER-STRESS ; KEY TRAIT ; XYLEM ; DIAMETER ; SUCROSE ; CONVERGENCE ; CALIFORNIA
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/2XILL650/375950
作者单位	[Stepanova, A., V; Akinlabi, F. M.; Sebiloane, K.; Van Wyk, B-E; Oskolski, A. A.] Univ Johannesburg, Dept Bot & Plant Biotechnol, POB 524, ZA-2006 Johannesburg, South Africa; [Stepanova, A., V; Oskolski, A. A.] Komarov Bot Inst, Prof Popov St 2, St Petersburg 197376, Russia
推荐引用方式 GB/T 7714	Stepanova, A., V,Akinlabi, F. M.,Sebiloane, K.,et al. Wood anatomy of the crown lineages in Proteoideae (Proteaceae): implications for evolution and adaptive value of bordered pits in imperforate tracheary elements[J],2021,197(4).
APA	Stepanova, A., V,Akinlabi, F. M.,Sebiloane, K.,Van Wyk, B-E,&Oskolski, A. A..(2021).Wood anatomy of the crown lineages in Proteoideae (Proteaceae): implications for evolution and adaptive value of bordered pits in imperforate tracheary elements.BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,197(4).
MLA	Stepanova, A., V,et al."Wood anatomy of the crown lineages in Proteoideae (Proteaceae): implications for evolution and adaptive value of bordered pits in imperforate tracheary elements".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 197.4(2021).