Nuclear ribosomal DNA and karyotypes indicate a NW African origin of South American Hypochaeris (Asteraceae, Cichorieae)

Tremetsberger, Karin; Weiss‐Schneeweiss, Hanna; Stuessy, Tod F.; Samuel, Rosabelle; Kadlec, Gertrud; Ortiz, M. Ángeles; Lozano, Salvador Talavera

doi:10.1016/j.ympev.2004.12.022

Cited by 53 publications

(67 citation statements)

References 48 publications

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“…Rather, the current distribution of Triquetrella appears to be of PliocenePleistocene age and therefore the result of dispersal. Studies of various organisms exhibiting broadly similar patterns of distribution have reached the same conclusion (Coleman et al, 2003;Shaw et al, 2003;Tremetsberger et al, 2005).…”

Section: Discussionmentioning

confidence: 68%

Triquetrella mxinwana, a new moss species from South Africa, with a phylogenetic and biogeographic hypothesis for the genus

Hedderson¹,

Zander²

2007

Journal of Bryology

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SUMMARYWe describe Triquetrella mxinwana, a new species presently known only from the winter rainfall area of South Africa. Within this region it is common in karroo and renosterveld, but it also occurs in fynbos. It differs from other Triquetrella species in the several low, bifid, papillae on each laminal cell, but is similar to the Australian Leptodontium paradoxum, differing in size and anatomical details. Although sporophytes of L. paradoxum are unknown, those of T. mxinwana have the peristome of Triquetrella rather than Leptodontium. Phylogenetic analysis of data from three chloroplast (rps4, trnL-F and psbA-trnH) and one nuclear (ITS1) loci confirms that T. mxinwana and L. paradoxum are sister taxa and together are sister to the rest of Triquetrella. This placement also better reflects gametophyte morphology, which, though intermediate between Triquetrella and Leptodontium, better fits the former. Divergence levels among species of Triquetrella are very low and molecular clock approaches indicate that all divergences are of Pliocene-Pleistocene age. The estimated time of the split between T. mxinwana and its nearest relative is concordant with independent paleoclimatic estimates of the time of onset of winter rainfall conditions in the Cape. The disjunctive distribution of the genus in areas of Mediterranean climate is attributed to dispersal rather than ancient vicariance.

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Section: Discussionmentioning

confidence: 68%

Triquetrella mxinwana, a new moss species from South Africa, with a phylogenetic and biogeographic hypothesis for the genus

Hedderson¹,

Zander²

2007

Journal of Bryology

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“…No flavonoid aglycones could be detected in the leaf washes of H. radicata L. and H. uniflora Vill. In a recent phylogenetic study (Tremetsberger et al, 2005), H. radicata was found to be in a separate clade from H. maculata, which claded together with H. uniflora. This relationship is apparently not reflected by exudate flavonoid data.…”

Section: Flavonoid Aglycones Of Lactuceae Speciesmentioning

confidence: 92%

Chemodiversity of Exudate Flavonoids in Seven Tribes of Cichorioideae and Asteroideae (Asteraceae)

Valant–Vetschera

Wollenweber

2007

Zeitschrift Für Naturforschung C

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Members of several genera of Asteraceae, belonging to the tribes Mutisieae, Cardueae, Lactuceae (all subfamily Cichorioideae), and of Astereae, Senecioneae, Helenieae and Heliantheae (all subfamily Asteroideae) have been analyzed for chemodiversity of their exudate flavonoid profiles. The majority of structures found were flavones and flavonols, sometimes with 6-and/or 8-substitution, and with a varying degree of oxidation and methylation. Flavanones were observed in exudates of some genera, and, in some cases, also flavonol-and flavone glycosides were detected. This was mostly the case when exudates were poor both in yield and chemical complexity. Structurally diverse profiles are found particularly within Astereae and Heliantheae. The tribes in the subfamily Cichorioideae exhibited less complex flavonoid profiles. Current results are compared to literature data, and botanical information is included on the studied taxa.

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“…E-mail: pmruas@uel.br. (Tremetsberger et al 2005). Following rapid events of adaptive radiation in the continent, the genus dispersed (between 0.25 and 1.00 mya) into new habitats, developing great deal of morphological variation (Stuessy et al 2003;Tremetsberger et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of twelve polymorphic microsatellite loci for Hypochaeris catharinensis (Asteraceae) and cross-amplification in related species

Chaves

Ruas

et al. 2015

J Genet

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Nuclear ribosomal DNA and karyotypes indicate a NW African origin of South American Hypochaeris (Asteraceae, Cichorieae)

Cited by 53 publications

References 48 publications

Triquetrella mxinwana, a new moss species from South Africa, with a phylogenetic and biogeographic hypothesis for the genus

Triquetrella mxinwana, a new moss species from South Africa, with a phylogenetic and biogeographic hypothesis for the genus

Chemodiversity of Exudate Flavonoids in Seven Tribes of Cichorioideae and Asteroideae (Asteraceae)

Isolation and characterization of twelve polymorphic microsatellite loci for Hypochaeris catharinensis (Asteraceae) and cross-amplification in related species

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