Taxonomy in Winteraceae

Vink, W.

doi:10.2307/1221108

Cited by 29 publications

(24 citation statements)

References 5 publications

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“…At present, Winteraceae comprise about 65 species in four to eight genera (e.g. Vink 1993), with the greatest generic and species diversity in Australasia (Belliolum, Bubbia, Exospermum, Pseudowintera, Tasmannia, Zygogynum;Vink 1970, 1985, 1988, 2003, Doust & Drinnan 2004 and America (Drimys;Smith 1943). A single taxon occurs in Madagascar (Takhtajania;Leroy 1978, 1980, Vink 1978.…”

Section: Introductionmentioning

confidence: 99%

Pollen morphology of extant Winteraceae: a study allowing SEM-based affiliation of its fossil representatives

Grímsson¹,

Xafis²,

Neumann³

et al. 2017

Acta Palaeobotanica

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ABSTRACT. When applying high-resolution microscopy, the pollen morphology of extant taxa can be used to classify fossil pollen, that is, to address the latter in the established systematic-phylogenetic framework. Here we investigate tetrads and pollen features of 20 different Winteraceae species, most of them belonging to the early-diverging generic lineages Tasmannia, Drimys and Pseudowintera. The tetrads and pollen are grouped into eleven pollen types based on diagnostic features observed by both light and scanning electron microscopy. The high-resolution scanning electron micrographs of recent material allow detailed comparison with fossil material, resulting in a more accurate affiliation of fossil tetrads/pollen to extant lineages. As a case study, early Miocene Winteraceae tetrads from South Africa are re-examined and formally described. The systematic placement of the African fossils is discussed in light of the pollen types presented here.

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Section: Introductionmentioning

confidence: 99%

Pollen morphology of extant Winteraceae: a study allowing SEM-based affiliation of its fossil representatives

Grímsson¹,

Xafis²,

Neumann³

et al. 2017

Acta Palaeobotanica

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“…The genus Drimys (Winteraceae) consists of six species of shrubs and small trees that are common to wet forested areas of tropical and temperate Central and South America ranging from montane cloud forests to maritime forests (11,12). In these wet regions, Drimys plants are often enveloped by clouds and frequent rainfall such that daytime atmospheric humidity exceeds 90% and annual rainfall may be upwards of 4,000 mm (12)(13)(14)(15).…”

mentioning

confidence: 99%

Stomatal plugs ofDrimys winteri(Winteraceae) protect leaves from mist but not drought

Feild

Zwieniecki

Donoghue

et al. 1998

Proc. Natl. Acad. Sci. U.S.A.

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Two outstanding features of the f lowering plant family Winteraceae are the occlusion of their stomatal pores by cutin plugs and the absence of water-conducting xylem vessels. An adaptive relationship between these two unusual features has been suggested whereby stomatal plugs restrict gas exchange to compensate for the presumed poor conductivity of their vesselless wood. This hypothesized connection fueled evolutionary arguments that the vesselless condition is ancestral in angiosperms. Here we show that in Drimys winteri, a tree common to wet forests, these stomatal occlusions pose only a small fixed resistance to water loss. In addition, they modify the humidity response of guard cells such that under high evaporative demand, leaves with plugs lose water at a faster rate than leaves from which the plugs have been experimentally removed. Instead of being adaptations for drought, we present evidence that these cuticular structures function to maintain photosynthetic activity under conditions of excess water on the leaf surface. Stomatal plugs decrease leaf wettability by preventing the formation of a continuous water film that would impede diffusion of CO 2 into the leaf. Misting of leaves had no effect on photosynthetic rate of leaves with plugs, but resulted in a marked decrease (Ϸ40%) in leaves from which the plugs had been removed. These findings do not support a functional association between stomatal plugs and hydraulic competence and provide a new perspective on debates surrounding the evolution of vessels in angiosperms.

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“…ex DC and Zygogynum Baill. s.I., which according to Vink (1985Vink ( , 1988, include Bubbia Tieghem and Exospermum Tieghem and was confirmed by Marquínez et al (2009). Winteraceae comprise about 80 species and again show a broad distribution in the southern hemisphere, including Australasia, Madagascar, Central and South America (Vink, 1988(Vink, , 2003.…”

Section: Introductionmentioning

confidence: 89%

Intercontinental long-distance dispersal of Canellaceae from the New to the Old World revealed by a nuclear single copy gene and chloroplast loci

Müller

Salomo

Salazar

et al. 2015

Molecular Phylogenetics and Evolution

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Canellales, a clade consisting of Winteraceae and Canellaceae, represent the smallest order of magnoliid angiosperms. The clade shows a broad distribution throughout the Southern Hemisphere, across a diverse range of dry to wet tropical forests. In contrast to their sister-group, Winteraceae, the phylogenetic relations and biogeography within Canellaceae remain poorly studied. Here we present the phylogenetic relationships of all currently recognized genera of Canellales with a special focus on the Old World Canellaceae using a combined dataset consisting of the chloroplast trnK-matK-trnK-psbA and the nuclear single copy gene mag1 (Maigo 1). Within Canellaceae we found high statistical support for the monophyly of Warburgia and Cinnamosma. However, we also found relationships that differ from previous studies. Cinnamodendron splitted into two clades, a South American clade and a second clade confined to the Antilles and adjacent areas. Cinnamodendron from the Antilles, as well as Capsicodendron, South American Cinnamodendron and Pleodendron were not monophyletic. Consequently, Capsicodendron should be included in the South American Cinnamodendron clade and the genus Pleodendron merged with the Cinnamodendron clade from the Antilles. We also found that Warburgia (restricted to mainland eastern Africa) together with the South American Cinnamodendron and Capsicodendron are sister to the Malagasy genus Cinnamosma. In addition to the unexpected geographical relationships, both biogeographic and molecular clock analyses suggest vicariance, extinction, and at least one intercontinental long-distance-dispersal event. Our dating result contrasts previous work on Winteraceae. Diversification of Winteraceae took place in the Paleocene, predating the Canellaceae diversification by 13 MA in the Eocene. The phylogenetic relationships for Canellaceae supported here offer a solid framework for a future taxonomic revision of the Canellaceae.

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Taxonomy in Winteraceae

Cited by 29 publications

References 5 publications

Pollen morphology of extant Winteraceae: a study allowing SEM-based affiliation of its fossil representatives

Pollen morphology of extant Winteraceae: a study allowing SEM-based affiliation of its fossil representatives

Stomatal plugs ofDrimys winteri(Winteraceae) protect leaves from mist but not drought

Intercontinental long-distance dispersal of Canellaceae from the New to the Old World revealed by a nuclear single copy gene and chloroplast loci

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