The phytomelanin layer in traditional members of <i>Bidens</i> and <i>Coreopsis</i> and phylogeny of the Coreopsideae (Compositae)

Tadesse, Mesfin; Crawford, Daniel J.

doi:10.1111/j.1756-1051.2011.001714.x

Cited by 14 publications

(6 citation statements)

References 23 publications

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“…The presence of phytomelanin in the cypsela is a common feature of most genera of the Heliantheae alliance (Anderberg et al ., ), one of the later diverging clades of the family, comprising 13 tribes (Pandey et al ., ). Some authors, including Tadesse & Crawford () and Pandey et al . (), have used the way in which phytomelanin accumulates to establish deposition patterns of the pericarp for related taxa.…”

Section: Introductionmentioning

confidence: 99%

“…Its morphology (symmetrical, asymmetrical or undifferentiated) is used in the delimitation of taxa (Haque & Godward, 1984). The internal structure (anatomy) also has taxonomic importance at different taxonomic levels, as demonstrated by, for example, Roth (1977), Pandey & Singh (1982), Källersjö (1985), Bruhl & Quinn (1990), Pak, Park & Whang (2001), Marzinek, De-Paula & Oliveira (2010), Pandey, Stuessy & Mathur (2014) and Tadesse & Crawford (2014).…”

Section: Introductionmentioning

confidence: 99%

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Fruits ofHeterocoma(Vernonieae-Lychnophorinae): taxonomic significance and a new pattern of phytomelanin deposition in Asteraceae

et al. 2015

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Heterocoma is a Brazilian endemic genus resulting from the dismemberment of Sipolisiinae, in which only representatives with fruit containing phytomelanin were included in the genus. As the fruits of Asteraceae are known to be systematically important at various taxonomic levels and Heterocoma fruit has not been described previously, we studied the morphology and anatomy of the cypselas of all species of the genus, comparing them with other fruits in the family containing phytomelanin and evaluating the systematic potential at the specific and tribal levels. The fruits were analysed by scanning electron microscopy (SEM) and light microscopy. The morphological features of the fruit, including the carpopodium, ribs and pappi, varied in the genus and demonstrated potential for species discrimination. The anatomy showed a pattern for the genus with a uniseriate exocarp, the outer mesocarp composed of fibres arranged in several layers, the inner mesocarp composed of several layers of parenchyma, the endocarp, and phytomelanin deposited between the inner and outer mesocarp. This anatomical pattern of phytomelanin deposition differs from that of other Asteraceae with phytomelanin in their fruit. Heterocoma is also the only genus in Vernonieae that has phytomelanin deposition in the cypselas. © 2015 The Linnean Society of London, Botanical Journal of the Linnean Society, 2015, 179, 255–265.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fruits ofHeterocoma(Vernonieae-Lychnophorinae): taxonomic significance and a new pattern of phytomelanin deposition in Asteraceae

et al. 2015

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“…Anatomy analyses indicates that phytomelanin in Clibadium, Desmanthodium , and Ichthyo is non-cellular organic mass accumulated in the space between the fibrous layer and the hypodermal cell layers (Putt, 1944; Rogers et al, 1982). Polymerization occurs outside the cell walls of the inner hypodermal cells (Pandey and Dhakal, 2001; Tadesse and Crawford, 2014). Therefore, the candidate genes annotated in the target genetic region were scrutinized for those encoding for proteins that may be secreted outside the cell.…”

Section: Discussionmentioning

confidence: 99%

Genetic Mapping and Evolutionary Analyses of the Black Grain Trait in Barley

et al. 2019

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Barley occupies the widest ecological area among the major cereal crops, thereby generating a high potential for adaptive genetic diversity against various environmental factors. Colored barley such as black grain barley has been suggested to result from environmental adaptation to biotic and abiotic stresses. Using one double haploid population (433 lines), plus three F5 recombinant inbred line (RIL) populations (1,009 lines), the black lemma and pericarp (Blp) gene was mapped between two Insertion/deletion (Indel) markers MC_1570156 and MC_162350 with a physical distance of 0.807 Mb, containing 21 annotated genes in the mapped interval. Whole-genome re-sequencing was performed on two Tibetan wild barley lines (X1 and W1) with black grain phenotype. The probable candidate genes for Blp were discussed based on gene functional annotation and gene sequence variation analyses. Thirteen polymorphic Indel markers covering the target genetic region were used to analyze 178 barley accessions including 49 black husk entries. Genotype-based clustering analyses showed that the black landraces of different geographical background may have evolved from a single origin. Our study represents a significant improvement on the genetic mapping of Blp and would facilitate future study on the characterization of the genetic basis underlying this interesting agronomic trait.

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“…More specifically, species with paleae attached to the fruits and other characters typical of sect. Pseudo agarista are also known in the California clade, which has been recognized as the separate genus Leptosyne D.C. (Keil, 2014;Mesfin Tadesse & Crawford, 2014). Variation among taxa and even within the same capitula of individual species exists for several of the characters present in sect.…”

Section: Discussionmentioning

confidence: 99%

Coreopsis sect. Pseudoagarista (Asteraceae: Coreopsideae): Molecular phylogeny, chromosome numbers, and comments on taxonomy and distribution

Crawford

Kimball

Carrillo-Reyes

et al. 2014

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Coreopsis (Asteraceae) sect. Pseudoagarista is the largest section in the genus. It is disjunct between the high mountains of Mexico and high elevations in the Andes. Most species in the section are similar in floral and fruit characters, and are distinguished primarily by leaf characters. Despite the morphological similarity among all species, the monophyly of the section has been called into question by molecular data. Prior studies of tribe Coreopsideae have been equivocal with, cpDNA markers indicating monophyly but nrDNA ITS sequences have not resolved the section as monophyletic. Expanded cpDNA and nrDNA ITS datasets, and statistical (i.e., AU) tests of the ITS and cpDNA topologies provide support that sect. Pseudoagarista is not monophyletic. Both data partitions strongly support the Mexican and South American subclades as monophyletic. The low cpDNA sequence variation within each subclade provides no resolution, and thus patterns of evolution within each were examined using a phylogenetic framework estimated from ITS data. Sequences from ITS fail to provide high resolution of relationships among South American species, a likely result of a recent, rapid radiation, as is known in other Andean lineages. Divergence among species is generally higher in the Mexican species, resulting in better resolution of phylogenetic relationships compared to South American species. Three ploidy levels (diploid, tetraploid, hexaploid) are known in species from South America, and diploids and tetraploids have been documented in Mexico. Multiple origins of polyploidy are indicated for both geographic areas.

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The phytomelanin layer in traditional members of Bidens and Coreopsis and phylogeny of the Coreopsideae (Compositae)

Cited by 14 publications

References 23 publications

Fruits ofHeterocoma(Vernonieae-Lychnophorinae): taxonomic significance and a new pattern of phytomelanin deposition in Asteraceae

Fruits ofHeterocoma(Vernonieae-Lychnophorinae): taxonomic significance and a new pattern of phytomelanin deposition in Asteraceae

Genetic Mapping and Evolutionary Analyses of the Black Grain Trait in Barley

Coreopsis sect. Pseudoagarista (Asteraceae: Coreopsideae): Molecular phylogeny, chromosome numbers, and comments on taxonomy and distribution

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