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  • 1
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    Ficus cornelisiana, a new species of Ficus subsection Urostigma (Moraceae) from the Sino-himalayan region (2014)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.59 (2014) nr.1 p.6
    Details
    Publication Date: 2015-03-06
    Description: A small fig tree has been misidentified as Ficus orthoneura for a long time. However, morphologically it is distinct from F. orthoneura and F. hookeriana. Typical are the ellipsoid, puberulous receptacle and caducous basal bracts. Leaf anatomy shows a multiple epidermis with the cells in the inner layer much larger than in the outer layer and thus both layers resemble an epidermis with a separate hypodermis. The abaxial cuticle is strongly sculptured, the palisade layer shows some long subdivided cells, and enlarged lithocysts are only present abaxially. Because of these differences we hereby describe it as a new species, named in honour of Cornelis (Cees) Berg: Ficus cornelisiana.
    Keywords: China ; Ficus ; Moraceae ; new species ; Vietnam
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 2
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    Phylogenetic and ecological signals in the wood of Spathelioideae (Rutaceae) (2012)
    In:  IAWA Journal vol. 33 no. 4, pp. 337-353
    Details
    Publication Date: 2024-01-12
    Description: Subfamily Spathelioideae of Rutaceae constitutes a well-supported early branching clade of eight small woody genera that were formerly assigned to five different Sapindalean/Rutalean families. This study brings together detailed wood anatomical information on all eight genera (for four the wood anatomy is described for the first time in detail). Wood anatomy strongly supports the inclusion of all Spathelioid genera in Rutaceae and underpins the molecular phylogeny with a set of interesting apomorphies at different nodes of the cladogram. The wood anatomy of Cneorum tricoccon with its semi-ring porosity, dendritic vessel pattern, vascular tracheids and helical vessel wall thickenings stands out in Spathelioideae. This wood anatomical syndrome is hypothesized to be due to adaptive evolution for hydraulic safety and efficiency of this species in a typical Mediterranean climate, where similar syndromes have evolved in many unrelated clades of woody dicots. In at least six unrelated genera of Rutaceae outside Spathelioideae from Mediterranean or cool temperate and montane climates, the syndrome has also evolved in presumably parallel, adaptive evolution.
    Keywords: Cneorum ; Dictyoloma ; Harrisonia ; Sohnreyia ; Spathelia ; vessel grouping ; hydraulic safety ; prismatic crystals ; xylem rays
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 3
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    Evolutionary trends in the morphology and harmomegathy of the pollen of the genus Guioa (Sapindaceae-Cupanieae) (1989)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 34 no. 1, pp. 21-60
    Details
    Publication Date: 2024-01-12
    Description: A pollen morphological survey of the genus Guioa is presented. Based on a study of the harmomegathy in relation to morphological series, evolutionary trends are postulated: 1. wide ectoapertures \xe2\x86\x92 narrow ectoapertures 2. grain parasyncolporate \xe2\x86\x92 grain colporate 3. grain parasyncolporate \xe2\x86\x92 grain syncolporate 4. ornamentation rugulate \xe2\x86\x92 ornamentation psilate-imperforate.\nIt is suggested that the most \xe2\x80\x98primitive\xe2\x80\x99 species of Guioa occur in the southeastern part of the distribution area of the genus. Guioa can be subdivided into four poorly delimited pollen morphological groups. Its affinities to other genera in the Cupanieae are briefly discussed. Pollen of the most \xe2\x80\x98primitive\xe2\x80\x99 group is similar to that of several \xe2\x80\x98primitive\xe2\x80\x99 genera (e.g. Arytera, Matayba, Molinaea, and Tina) in the tribe.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 4
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    Systematic leaf anatomy of Baccaurea, Distichirhops, and Nothobaccaurea (Euphorbiaceae) (2001)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 46 no. 3, pp. 485-497
    Details
    Publication Date: 2024-01-12
    Description: The leaf anatomical diversity of the genera Baccaurea Lour. (43 species), Distichirhops Haegens (3 species) and Nothobaccaurea Haegens (2 species) (Euphorbiaceae) is described. Two species of Aporosa and three species of Maesobotrya were examined for comparison. The following characters are important for the delimitation of species: hair types, the position of the glandular areas on the leaf margin, the hairiness and size of the glandular areas, the number of epidermal layers, the presence of (mucilage) idioblasts in the epidermis, the presence of palisade parenchyma above the vascular bundles, and the birefringence of the spongy parenchyma cell walls. However, leaf anatomy did not yield characters for distinction between the five genera studied. Phenetic analysis resulted in a grouping based on leaf anatomical similarities that corresponds to a large extent with the phylogenetic position of species based on a cladistic analysis of largely macromorphological features (Haegens, 2000).
    Keywords: Baccaurea ; Distichirhops ; Maesobotrya ; Nothobaccaurea ; Euphorbiaceae ; hairs ; leaf anatomy ; leaf glands ; systematics
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 5
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    Ficus cornelisiana, a new species of Ficus subsection Urostigma (Moraceae) from the Sino-himalayan region (2014)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 59 no. 1, pp. 6-9
    Details
    Publication Date: 2024-04-10
    Description: A small fig tree has been misidentified as Ficus orthoneura for a long time. However, morphologically it is distinct from F. orthoneura and F. hookeriana. Typical are the ellipsoid, puberulous receptacle and caducous basal bracts. Leaf anatomy shows a multiple epidermis with the cells in the inner layer much larger than in the outer layer and thus both layers resemble an epidermis with a separate hypodermis. The abaxial cuticle is strongly sculptured, the palisade layer shows some long subdivided cells, and enlarged lithocysts are only present abaxially. Because of these differences we hereby describe it as a new species, named in honour of Cornelis (Cees) Berg: Ficus cornelisiana.
    Keywords: China ; Ficus ; Moraceae ; new species ; Vietnam
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 6
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    A Collagen10a1 mutation disrupts cell polarity in a medaka model for metaphyseal chondrodysplasia type Schmid (2024)
    Elsevier BV
    In:  iScience vol. 27 no. 109405
    Details
    Publication Date: 2024-05-22
    Description: Heterozygous mutations in COL10A1 lead to metaphyseal chondrodysplasia type Schmid (MCDS), a skeletal disorder characterized by epiphyseal abnormalities. Prior analysis revealed impaired trimerization and intracellular retention of mutant collagen type X alpha 1 chains as cause for elevated endoplasmic reticulum (ER) stress. However, how ER stress translates into structural defects remained unclear. We generated a medaka (Oryzias latipes) MCDS model harboring a 5 base pair deletion in col10a1, which led to a frameshift and disruption of 11 amino acids in the conserved trimerization domain. col10a1D633a heterozygotes recapitulated key features of MCDS and revealed early cell polarity defects as cause for dysregulated matrix secretion and deformed skeletal structures. Carbamazepine, an ER stress -reducing drug, rescued this polarity impairment and alleviated skeletal defects in col10a1D633a heterozygotes. Our data imply cell polarity dysregulation as a potential contributor to MCDS and suggest the col10a1D633a medaka mutant as an attractive MCDS animal model for drug screening.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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