Calyx (con)fusion in a hyper-diverse genus: Parallel evolution of unusual flower patterns in Eugenia (Myrtaceae)

Giaretta, Augusto; Vasconcelos, Thaís; Mazine, Fiorella Fernanda; Faria, Jair Eustáquio Quintino; Flores, Rodolfo; Holst, Bruce K.; Sano, Paulo Takeo; Lucas, Eve

doi:10.1016/j.ympev.2019.106553

Cited by 13 publications

(22 citation statements)

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“…ndhF, matK, rbcL, tRNA intergenic regions) became available, and subsequent works focusing on the whole family phylogeny used molecular data from the same genetic sources (Biffin et al, 2010;Murillo-A. et al, 2012;Thornhill et al, 2015Thornhill et al, , 2019Schuster et al, 2018;Giaretta et al, 2019). With that approach, the flesh-fruited tribes Syzygieae and Myrteae were proposed to form a clade along with Backhousieae, Kanieae, Metrosidereae and Tristanieae, tribes including species with dry capsular fruits.…”

Section: Discussionmentioning

confidence: 99%

Perspectives in Myrtaceae evolution from plastomes and nuclear phylogenies

et al. 2022

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Myrtaceae is a large and species-rich family of woody eudicots, with prevalent distribution in the Southern Hemisphere. Classification and taxonomy of species belonging to this family is quite challenging, sometimes with difficulty in species identification and producing phylogenies with low support for species relationships. Most of the current knowledge comes from few molecular markers, such as plastid genes and intergenic regions, which can be difficult to handle and produce conflicting results. Based on plastid protein-coding sequences and nuclear markers, we present a topology for the phylogenetic relationships among Myrtaceae tribes. Our phylogenetic estimate offers a contrasting topology over previous analysis with fewer markers. Plastome phylogeny groups the tribes Syzygieae and Eucalypteae and individual chloroplast genes produce divergent topologies, especially among species within Myrteae tribe, but also in regard to the grouping of Syzygieae and Eucalypteae. Results are consistent and reproducible with both nuclear and organellar datasets. It confronts previous data about the deep nodes of Myrtaceae phylogeny.

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Section: Discussionmentioning

confidence: 99%

Perspectives in Myrtaceae evolution from plastomes and nuclear phylogenies

et al. 2022

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“…Biological classifications are permanently "works in progress" (e.g., The Angiosperm Phylogeny Group [APG], 1998[APG], , 2003[APG], , 2009[APG], , 2016, and this is particularly true for Eugenia, where morphological delimitation has substantially changed over the last few years. These changes have been driven by recent phylogenetic studies based on molecular data (van der Merwe et al, 2005;Cruz et al, 2013;Mazine et al, 2014;Bünger et al, 2016a;Mazine et al, 2018;Giaretta et al, 2019b;Flickinger et al, 2020). According to these molecular phylogenetic reconstructions, the following formerly segregated genera are now treated under Eugenia: Calycorectes O.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic Relationships Within the Hyper-Diverse Genus Eugenia (Myrtaceae: Myrteae) Based on Target Enrichment Sequencing

et al. 2022

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Eugenia is one of the most taxonomically challenging lineages of flowering plants, in which morphological delimitation has changed over the last few years resulting from recent phylogenetic study based on molecular data. Efforts, until now, have been limited to Sanger sequencing of mostly plastid markers. These phylogenetic studies indicate 11 clades formalized as infrageneric groups. However, relationships among these clades are poorly supported at key nodes and inconsistent between studies, particularly along the backbone and within Eugenia sect. Umbellatae encompasses ca. 700 species. To resolve and better understand systematic discordance, 54 Eugenia taxa were subjected to phylogenomic Hyb-Seq using 353 low-copy nuclear genes. Twenty species trees based on coding and non-coding loci of nuclear and plastid datasets were recovered using coalescent and concatenated approaches. Concordant and conflicting topologies were assessed by comparing tree landscapes, topology tests, and gene and site concordance factors. The topologies are similar except between nuclear and plastid datasets. The coalescent trees better accommodate disparity in the intron dataset, which contains more parsimony informative sites, while concatenated trees recover more conservative topologies, as they have narrower distribution in the tree landscape. This suggests that highly supported phylogenetic relationships determined in previous studies do not necessarily indicate overwhelming concordant signal. Congruence must be interpreted carefully especially in concatenated datasets. Despite this, the congruence between the multi-species coalescent (MSC) approach and concatenated tree topologies found here is notable. Our analysis does not support Eugenia subg. Pseudeugenia or sect. Pilothecium, as currently circumscribed, suggesting necessary taxonomic reassessment. Five clades are further discussed within Eugenia sect. Umbellatae progress toward its division into workable clades. While targeted sequencing provides a massive quantity of data that improves phylogenetic resolution in Eugenia, uncertainty still remains in Eugenia sect. Umbellatae. The general pattern of higher site coefficient factor (CF) than gene CF in the backbone of Eugenia suggests stochastic error from limited signal. Tree landscapes in combination with concordance factor scores, as implemented here, provide a comprehensive approach that incorporates several phylogenetic hypotheses. We believe the protocols employed here will be of use for future investigations on the evolutionary history of Myrtaceae.

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“…If floral buds at tearing state are not available in a specimen and only its mature flowers can be examined, it looks like the initial tearing of the flower bud produced four calyx lobes (Figure 16 D), which is not the case. Floral buds opening patterns where tearing from two lobes have been described in Eugenia by Giaretta et al (2019) and floral buds of E. rogersiana seems to follow their 'Petaloid' pattern, although in this species the floral bud seems to be completely closed and there are not evident remains of vestigial lobes at the apex, at least in the examined specimens.…”

Section: New Combinationmentioning

confidence: 62%

“…Calyx closed in buds altogether with having an embryo as a solid mass have been traditionally used as diagnostic characters of the genus Calycorectes. Nevertheless, phylogenetic analyses have shown that this genus is nested within Eugenia (Mazine et al 2014;Giaretta et al 2019) and currently is considered as a synonym of Eugenia (Giaretta et al 2018). Eugenia rogersiana was described only from the type and such specimen does not have fruits; fruiting specimens examined here have embryos as a solid mass, which allowed me to confirm its placement into Eugenia and to provide a redescription for this species.…”

Section: New Combinationmentioning

confidence: 73%

“…Eugenia linaresii could be related also to the Eugenia feijoi complex, a group of species characterized by having dibrachiate or laterally attached hairs, the midvein of leave blades elevated into a narrow line above, partially connate calyx-lobes, and elongate and gray anthers (McVaugh 1956;Holst 2002;Barrie et al 2016); its members have also dark blades, and the blade margins have a lighter color than the blade when the specimens are dry (R. Flores, personal communication). Recently, Giaretta et al (2019) found that members of this complex, informally called as the "Eugenia feijoi group" also have a membranous tissue in the sepals; in E. linaresii a membranous tissue is seen at the tip of the sepals, but not as described by Giaretta et al (2019). Eugenia linaresii has most of the characters of the Eugenia feijoi complex mentioned above, but neither dibrachiate or laterally attached hairs nor elongate and grey anthers.…”

Section: Resultsmentioning

confidence: 99%

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<strong>Thirteen new species, new records, and a new combination on Colombian Myrtaceae</strong>

Parra‐O.

2021

Phytotaxa

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Thirteen new species of Myrtaceae from Colombia are described and illustrated; information about the habitats in which these species are growing, the evaluation of its conservation status, and its affinities are included. Besides, five new records of native and introduced Myrtaceae are reported for Colombia. Also, a new combination of a Myrtaceae species previously described as Calycorectes is proposed here under the genus Eugenia.

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Calyx (con)fusion in a hyper-diverse genus: Parallel evolution of unusual flower patterns in Eugenia (Myrtaceae)

Cited by 13 publications

References 64 publications

Perspectives in Myrtaceae evolution from plastomes and nuclear phylogenies

Perspectives in Myrtaceae evolution from plastomes and nuclear phylogenies

Phylogenetic Relationships Within the Hyper-Diverse Genus Eugenia (Myrtaceae: Myrteae) Based on Target Enrichment Sequencing

<strong>Thirteen new species, new records, and a new combination on Colombian Myrtaceae</strong>

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