A phylogeny and biogeographic analysis for the Cape-Pondweed family Aponogetonaceae (Alismatales)

Chen, Ling Yun; Grimm, Guido W.; Wang, Qing Feng; Renner, Susanne S.

doi:10.1016/j.ympev.2014.10.007

Cited by 22 publications

(13 citation statements)

References 31 publications

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“…That ancestral pollen types are found in isolated species in Australasia and Africa/South America is not entirely unusual. For instance, the oldest known Aponogeton pollen shows a type, which today is also only found in two phylogenetically only distant-related Madagascan and south-western Australian species (Grímsson et al 2014; Chen et al 2015). …”

Section: Discussionmentioning

confidence: 99%

Evolution of pollen morphology in Loranthaceae

Grímsson

Grimm

Zetter

2017

Grana

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Earlier studies indicate a strong correlation of pollen morphology and ultrastructure with taxonomy in Loranthaceae. Using high-resolution light microscopy and scanning electron microscopy imaging of the same pollen grains, we document pollen types of 35 genera including 15 studied for the first time. Using a molecular phylogenetic framework based on currently available sequence data with good genus-coverage, we reconstruct trends in the evolution of Loranthaceae pollen and pinpoint traits of high diagnostic value, partly confirming earlier intuitive hypotheses based on morphological observations. We find that pollen morphology in Loranthaceae is strongly linked to phylogenetic relationships. Some pollen types are diagnostic for discrete genera or evolutionary lineages, opening the avenue to recruit dispersed fossil pollen as age constraints for dated phylogenies and as independent data for testing biogeographic scenarios; so far based exclusively on modern-day data. Correspondences and discrepancies between palynological and molecular data and current taxonomic/systematic concepts are identified and suggestions made for future palynological and molecular investigations of Loranthaceae.

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Section: Discussionmentioning

confidence: 99%

Evolution of pollen morphology in Loranthaceae

Grímsson

Grimm

Zetter

2017

Grana

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“…This relatively recent timing confirms that dispersal, rather than vicariance linked to continental fragmentation, explains species distribution patterns. The high dispersal ability of dust-like spores has been previously invoked to explain LDD in fern lineages of diverse ages and in different areas (e.g., Chao et al, 2014;Chen et al, 2015;Hennequin et al, 2010;Labiak et al, 2014Labiak et al, , 2010Le Péchon et al, 2016;Lu et al, 2012;Wei et al, 2015). In addition, epiphytism with occurrence of long-lived and slow growing gametophytes, as observed in grammitids (Parris, 1990;Stokey et al, 1958), may allow to delay sexual reproduction until a second gametophyte germinates nearby and confer an additional advantage for successful colonization (Dassler and Farrar, 2001;Moran and Smith, 2001;Sessa et al, 2016) In contrast to those previous findings, we recovered the existence of an African-WIO clade nested within the Paleotropical clade, and composed of species sampled for the first time (clade-V, Fig.…”

Section: Biogeographic History Of Grammitid Ferns and Origins Of Thementioning

confidence: 99%

Madagascar sheds new light on the molecular systematics and biogeography of grammitid ferns: New unexpected lineages and numerous long-distance dispersal events

Bauret

Gaudeul

Sundue

et al. 2017

Molecular Phylogenetics and Evolution

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Based on a worldwide phylogenetic framework filling the taxonomic gap of Madagascar and surrounding islands of the Western Indian Ocean (WIO), we revisited the systematics of grammitid fern species (Polypodiaceae). We also investigated the biogeographic origin of the extant diversity in Madagascar and estimated the relative influence of vicariance, long-distance dispersals (LDD) and in situ diversification. Phylogenetic inferences were based on five plastid DNA regions (atpB, rbcL, rps4-trnS, trnG-trnR, trnL-trnF) and the most comprehensive taxonomic sampling ever assembled (224 species belonging to 31 out of 33 recognized grammitids genera). 31 species from Madagascar were included representing 87% of the described diversity and 77% of the endemics. Our results confirmed a Paleotropical clade nested within an amphi-Atlantic grade. In addition, we identified three new major clades involving species currently belonging to Grammitis s.l., Ctenopterella and Enterosora. We resolved for the first time Grammitis s.s. as monophyletic, and Ctenopterella (newly tested here) and Enterosora as polyphyletic. The Neotropical genus Moranopteris was shown to also occur in Madagascar through a newly discovered species. Most importantly, we suggest a >30% inflation of the species number in the WIO due to the hidden diversity in >10 cryptic lineages, best explained by high morphological homoplasy. Molecular dating and ancestral areas reconstruction allowed identifying the Neotropics as the predominant source of LDD to the African-WIO region, with at least 12 colonization events within the last 20Ma. Repeated eastward migrations may be explained by transoceanic westerly winds transporting the dust-like spores. Tropical Asia s.l. would also have played a (minor) role through one dispersal event to Madagascar at the end of the Oligocene. Last, within the complex Malagasy region made of a mosaic of continental and oceanic islands located close to the African continent, we showed that contrary to theoretical expectations and empirical evidence in angiosperms, Africa does not act as a dispersal source and Madagascar seems to have a more important influence on the regional dynamics: we observed both in situ species diversification and dispersal out of Madagascar. This influence also extends beyond the region, since one dispersal event probably originated from Madagascar and reached the Subantarctic island of Amsterdam.

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“…The freshwater cape-pondweed family Aponogetonaceae comprises approximately 60 species in the sole genus Aponogeton ( Chen et al., 2015 , Manawaduge et al., 2016 ), which are predominantly distributed in tropical and subtropical regions of Africa (~33 species), Asia (~14 species), and Australia (~13 species) ( Manawaduge et al., 2016 ). Because of their variable leaf shape and unique inflorescences, Aponogeton species have become commercially valuable aquarium plants ( Les et al., 2005 , Dauphinee et al., 2015 ) that have been cultivated, in some cases (e.g., Aponogeton madagascariensis ), for nearly two centuries ( Manawaduge and Yakandawala, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

The complete plastome sequences of five Aponogeton species (Aponogetonaceae): Insights into the structural organization and mutational hotspots

Mwanzia

Gichira

et al. 2020

Plant Diversity

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Members of the aquatic plant genus Aponogeton are widely used commercially in aquariums because of their variable leaf shape and unique inflorescences. However, due to extensive similarity between species in this genus, morphological characters are generally inadequate for taxonomic classification. Currently, molecular makers available for taxonomic and phylogenetic studies of Aponogeton are limited. One approach to clarifying relationships between species in these complex groups is to use divergence hotspot regions within the genome. Here, we sequenced and analyzed the plastomes of five Aponogeton species collected from China, Zambia, and Kenya, and subsequently screened these plastomes for divergent DNA hotspots. The five plastomes are circular structures with sizes ranging from 154,167 bp to 154,860 bp. The Large and the Small Single Copies are separated by two Inverted Repeats. One hundred and thirteen unique genes were identified including 79 protein-coding, 30 tRNA, and four rRNA genes. We found that the most abundant repeats in all but one species were mononucleotide repeats (A/T) and that there were 23 potential RNA ending sites. Interestingly, a ~3 kb inversion, which includes the accD gene, was detected within the Asian species of Aponogeton . The inversion may be related to more frequent exchanges between this region and the nuclear genome. Furthermore, we detected mutational hotspot sites among the five Aponogeton species. Three of these hotspots are intergenic spacer regions ( accD-psaI , rbcL-accD and trnH-GUG-psbA ) that might be suitable for use as barcodes to resolve intra-generic relationships. We also identified four highly variable protein-coding genes ( ccsA , rpl22 , rps16 and ycf1 ) may be used as barcodes to resolve the higher-level phylogenies. Our study will provide valuable molecular resources for the taxonomic and phylogenomic study of the complex genus Aponogeton .

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A phylogeny and biogeographic analysis for the Cape-Pondweed family Aponogetonaceae (Alismatales)

Cited by 22 publications

References 31 publications

Evolution of pollen morphology in Loranthaceae

Evolution of pollen morphology in Loranthaceae

Madagascar sheds new light on the molecular systematics and biogeography of grammitid ferns: New unexpected lineages and numerous long-distance dispersal events

The complete plastome sequences of five Aponogeton species (Aponogetonaceae): Insights into the structural organization and mutational hotspots

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