Systematic implications of wood and bark anatomy in the Pacific Island genus Meryta (Araliaceae)

Oskolski, Alexei A.; Kotina, Ekaterina L.; Fomichev, Ivan V.; Tronchet, Frédéric; Lowry, Porter P.

doi:10.1111/j.1095-8339.2007.00612.x

Cited by 13 publications

(11 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…& G.Forst. (Oskolski et al ., ) revealed a set of characters that is consistent with their placement as sister groups in phylogenetic studies based on molecular evidence (Plunkett, Wen & Lowry, ; Plunkett et al ., ; Tronchet et al ., ).…”

Section: Introductionsupporting

confidence: 58%

“…Wood anatomy has provided useful systematic data in Araliaceae and related families (e.g. Oskolski, 1995Oskolski, , 1996Oskolski, Lowry & Richter, 1997;Oskolski & Lowry, 2000, 2001Oskolski et al, 2007). Surveying a representative although still relatively constrained sampling of 36 species drawn from all five major clades of Schefflera s.l., Oskolski (1995) recognized seven species groups based on wood features.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Systematic and ecological wood anatomy of NeotropicalSchefflera(Araliaceae), with an emphasis on theDidymopanaxgroup

et al. 2013

Self Cite

View full text Add to dashboard Cite

Wood anatomy has been investigated from 35 species belonging to the Neotropical clade of the polyphyletic genus Schefflera (Araliaceae), representing three of the five subgroups (Didymopanax, Crepinella and Sciodaphyllum). The species examined are rather uniform in their wood structure, sharing the presence of scalariform and simple perforation plates, septate fibres and scanty paratracheal axial parenchyma. The observed variation in many wood characters showed statistically significant differences relative to latitude, climate and, especially, vegetation types. In particular, the intervessel pits are larger in species from higher latitudes and in seasonally dry habitats than those from lower latitudes and rainforests. Latitudinal and ecological trends in the variation of vessel element lengths, bar numbers on perforation plates, intervessel pit sizes and ray widths may be at least partially explained as effects of adaptation to drier environments in the course of dispersal outside the Amazonian region and diversification in the Atlantic Forest subclade and the Savannic subclade within the Didymopanax group. The occurrence of a granular annulus on the intervessel pit membranes in S. chimantensis and S. sprucei (both of the Crepinella group) is the first record of this feature in Araliaceae. In comparisons of Neotropical Schefflera with the other major clades of Schefflera sensu lato, wood anatomical diversity is consistent with the polyphyly of this genus based on molecular phylogenetic analyses. © 2013 The Linnean Society of London, Botanical Journal of the Linnean Society, 2013, 173, 452–475.

show abstract

Section: Introductionsupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Systematic and ecological wood anatomy of NeotropicalSchefflera(Araliaceae), with an emphasis on theDidymopanaxgroup

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…This choice is founded on two main points. First, fiber presence and distribution are characteristic 902 INTERNATIONAL JOURNAL OF PLANT SCIENCES for some extant taxa and considered an important taxonomic element by a majority of authors (e.g., Liu and Gao 1993;Oskolski et al 2007; Kotina et al 2012 and references in these articles). Second, fibers are usually the best preserved and most conspicuous elements in fossil phloem, so their distribution cannot be subject to as many doubts as can be the case with thin-walled cells, especially sieve cells.…”

Section: Anatomical Models For Devonian-carboniferousmentioning

confidence: 98%

Secondary Phloem in Early Carboniferous Seed Plants: Anatomical Diversity and Evolutionary Implications

Decombeix

Galtier

Meyer‐Berthaud

2014

International Journal of Plant Sciences

View full text Add to dashboard Cite

Editor: Michael T. DunnPremise of research. Secondary phloem produced by a bifacial vascular cambium is the distinctive feature of lignophytes, the group that comprises the seed plants and the progymnosperms. Because secondary phloem is rarely well preserved in the fossil record, our knowledge of the evolution of this tissue remains incomplete.Methodology. We illustrate the secondary phloem anatomy of nine seed plants of Mississippian (Early Carboniferous) age that represent to date the oldest representatives of the group in which this tissue is well preserved. In addition, we review the information available on the secondary phloem anatomy of Devonian progymnosperms and Late Carboniferous-Permian seed plants.Pivotal results. Secondary phloem anatomy was already diversified in the Mississippian seed plants, in terms of cell composition and spatial organization of the different cell types. We propose four models of secondary phloem anatomy and organization in lignophytes of Devonian-Carboniferous age.Conclusions. The diversity of secondary phloem anatomy in Mississippian seed plants parallels what is observed for other parts of their vascular system; it is most likely linked to the Mississippian diversification of seed plant growth architectures and habitats. The accumulated fossil evidence also demonstrates that several characters that have been considered as advanced on the basis of the study of extant gymnosperms (e.g., the presence of fibers in the functional phloem and the arrangement in alternate tangential layers of a same cell type) were actually already present in some early representatives of the lignophytes.

show abstract

“…An anatomical study can be useful to support evidence obtained from other sources of taxonomic information (Metcalfe & Chalk, 1950; Rodríguez, 1957; Guyot, 1966; Chuang, 1970; Theobald, 1971; Lotova & Timonin, 2005; Oskolski et al ., 2007). This study was carried out to evaluate the taxonomic value of anatomical characters in exploring the relationships between the two woody southern African genera representing Steganotaenieae and their possible affinity with Saniculoideae.…”

Section: Introductionmentioning

confidence: 92%

Wood and bark anatomy of Steganotaenia and Polemanniopsis (tribe Steganotaenieae, Apiaceae) with notes on phylogenetic implications

Oskolski¹,

Rossouw²,

Wyk³

2010

Botanical Journal of the Linnean Society

Self Cite

View full text Add to dashboard Cite

The wood and bark structure of the distinctive southern African genera Polemanniopsis (including the newly described species P. namibensis) and Steganotaenia have been described. To allow for comparisons with the traditional subfamily Saniculoideae, a shrubby species of Eryngium from the Juan Fernández Islands was also studied. Polemanniopsis and Steganotaenia were recently considered as two closely related genera forming a new tribe Steganotaenieae of subfamily Saniculoideae (Apiaceae), whereas Eryngium is commonly recognized as a member of Saniculoideae. Eryngium differs significantly from the other two genera in the smaller size of intervessel pits, sclerification and radial dilatation in collapsed secondary phloem, the absence of crystals in the phelloderm cells and the occurrence of druse crystals in secondary phloem ray cells. Steganotaenia and Polemanniopsis share features, including the presence of marginal axial parenchyma, the occurrence of radial secretory canals in secondary xylem, dilatation of the secondary phloem by axial parenchyma stretching, cortical periderm initiation and the presence of chambered phelloderm cells containing druse crystals. These characters (especially the occurrence of chambered crystalliferous cells in phelloderm, which has not yet been reported for Apiaceae) support both the monophyly and the isolated position of the Steganotaeniae. No reliable synapomorphic features could be found to support a relationship with Saniculoideae. Steganotaenia is remarkable in the presence of axial secretory canals in the phelloderm: these structures have not yet been found in the periderm of any member of Apiales. Our results do not provide any support for the suggestion that the woody habit in the three genera examined was derived from herbaceous ancestors secondarily.

show abstract

Systematic implications of wood and bark anatomy in the Pacific Island genus Meryta (Araliaceae)

Cited by 13 publications

References 22 publications

Systematic and ecological wood anatomy of NeotropicalSchefflera(Araliaceae), with an emphasis on theDidymopanaxgroup

Systematic and ecological wood anatomy of NeotropicalSchefflera(Araliaceae), with an emphasis on theDidymopanaxgroup

Secondary Phloem in Early Carboniferous Seed Plants: Anatomical Diversity and Evolutionary Implications

Wood and bark anatomy of Steganotaenia and Polemanniopsis (tribe Steganotaenieae, Apiaceae) with notes on phylogenetic implications

Contact Info

Product

Resources

About