Phylogenetic relationships and infrageneric classification of Epidendrum subgenus Amphiglottium (Laeliinae, Orchidaceae)

Pinheiro, Fábio; Koehler, Samantha; Corrêa, Andréa Macêdo; Salatino, Maria Luiza Faria; Salatino, Antônio; Barros, Fábio de

doi:10.1007/s00606-009-0224-2

Cited by 39 publications

(75 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…ibaguense presented intra-and interpopulation variation in chromosome number, with 2n = 58, 72, and 76 (Figure 2), and 2n = 58 being most common in four individuals from both studied populations. This finding represents a valuable contribution to the cytogenetic status of E. ibaguense since 2n = 70 has been the only chromosome number report up to now (Pinheiro et al, 2009). At population 1, the terrestrial, magenta-flowered individual presented 2n = 58, while the terrestrial, red-flowered individual sheltered in the shade presented 2n = 72.…”

Section: Resultsmentioning

confidence: 64%

“…Epidendrum is one of the few genera that present variation in chromosome number, including at the intraspecific level [e.g., E. ciliare L., E. denticulatum, E. radicans, E. xanthinum, and in the complex E. secundum (Tanaka and Kamemoto, 1984;Pinheiro et al, 2009;Felix and Guerra, 2010;Assis et al, 2013) and E. ibaguense (this study)].…”

Section: Discussionmentioning

confidence: 91%

“…In E. cinnabarinum, for instance, the intraspecific polyploidy seems to be related to the acquisition of the rupiculous habit (Felix and Guerra, 2010). Interestingly, this and other polyploid species are found in disturbed environments (Assis, 2009;Pinheiro et al, 2009;Felix and Guerra, 2010). Duplicated or repetitive gene sequence may provide a local advantage for polyploid organisms (Fawcett and Van der Peer, 2010).…”

Section: Discussionmentioning

confidence: 98%

“…In E. ibaguense, the chromosome number was first reported by Pinheiro et al (2009). These authors determined 2n = 70 for individuals from Serra de Pacaraima, located on the border between Venezuela and Roraima.…”

Section: Discussionmentioning

confidence: 99%

“…Rodr.,2n = 40,57,60,62,64,70;and E. xanthinum Lindl.,2n = 28,30,40,60,ca. 80) (Pinheiro et al, 2009;Felix and Guerra, 2010;Assis et al, 2013). The largest number of cytotypes is currently known for E. secundum Jacq., with 2n = 28, 40, 48, 52, 68, and 80 (Pinheiro et al, 2009) or 2n = 30, 42, 50, 54, 56, 58, and84 (Assis et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Research Article Chromosome variations and diversity of Epidendrum ibaguense Lindl. (Orchidaceae) on the Tepequém's Tepuy, Roraima, Brazil.

et al. 2017

View full text Add to dashboard Cite

ABSTRACT. Studies addressing chromosome variations have elucidated many points regarding the taxonomy of the Orchidaceae. Epidendrum L. besides being one the largest orchid genera, present remarkable morphological, and inter-and intraspecific chromosome variations. Thus, based on a previous report on flower color variation in individuals of E. ibaguense (magenta, pink, white, and red), our aim was to determine its chromosome number and test whether this trait is associated with flower color variation in natural populations on the Tepequém's Tepuy, Roraima. Root apices were pre-treated with 8-hydroxyquinoline at 4°C for 24 h and subsequently submitted to conventional cytogenetic procedures. Slides with the best spreading and contraction of chromosomes were photographed under light microscopy. Chromosome number was determined by counting at least 10 mitotic metaphase cells per individual. The types of interphase nuclei were determined for 30 nuclei per individual. E. ibaguense presented intra-and interpopulation variation in chromosome number, with 2n = 58, 72, and 76. The chromosome number 2n = 58 was most commonly found in individuals with magenta, pink, and white flowers, while the remaining two chromosome numbers occurred mostly in red-flowered individuals. The types of interphase nuclei were associated with the chromosome number. Individuals with 2n = 58 presented a predominance of semi-reticulated nuclei, while in those with 2n = 72 and 76 the nuclei were predominantly non-reticulated. The dominance of disploidy in E. ibaguense suggests that this cytotype provides this species with a territorial advantage and a higher reproductive success, possibly contradicting the polyploid hypothesis. Our results suggest that chromosome number may not represent a reproductive barrier in genus Epidendrum.

show abstract

Section: Resultsmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Research Article Chromosome variations and diversity of Epidendrum ibaguense Lindl. (Orchidaceae) on the Tepequém's Tepuy, Roraima, Brazil.

et al. 2017

View full text Add to dashboard Cite

show abstract

Salt tolerance in a neotropical orchid in the absence of local adaptation to salt spray

de Lima,

Silva,

Ribeiro

et al. 2024

American J of Botany

View full text Add to dashboard Cite

PremiseSalt tolerance has rarely been investigated regionally in the neotropics and even more rarely in Orchidaceae, one of the largest families. Therefore, investigating local adaptation to salt spray and its physiological basis in Epidendrum fulgens, a neotropical orchid species, brings important new insights.MethodsWe assessed the degree of salt tolerance in E. fulgens by testing whether coastal populations are more tolerant to salt, which could point to local adaptation. To understand the physiological basis of such salt tolerance, we exposed wild‐collected individuals to salt spray for 60 days, then measured leaf expansion, osmotic potential, sodium leaf concentration, chlorophyll leaf index, chlorophyll fluorescence, relative growth rate, and pressure–volume curves.ResultsThere is no local adaptation to salt spray since both inland and coastal plants have a high tolerance to salt stress. This tolerance is explained by the ability to tolerate high concentrations of salt in leaf tissues, which is related to the high succulence displayed by this species.ConclusionsWe showed an unprecedented salt tolerance level for an orchid species, highlighting our limited knowledge of that trait beyond the traditional studied groups. Another interesting finding is that salt tolerance in E. fulgens is linked to succulence, is widespread, and is not the result of local adaptation. We suggest that E. fulgens and its allied species could be an interesting group to explore the evolution of important traits related to tolerance to salt stress, like succulence.

show abstract

Interploidy hybridization in sympatric zones: the formation ofEpidendrum fulgens × E. puniceoluteumhybrids (Epidendroideae,Orchidaceae)

Moraes

Chinaglia

Palma‐Silva

et al. 2013

Ecology and Evolution

Self Cite

View full text Add to dashboard Cite

Interspecific hybridization is a primary cause of extensive morphological and chromosomal variation and plays an important role in plant species diversification. However, the role of interploidal hybridization in the formation of hybrid swarms is less clear. Epidendrum encompasses wide variation in chromosome number and lacks strong premating barriers, making the genus a good model for clarifying the role of chromosomes in postzygotic barriers in interploidal hybrids. In this sense, hybrids from the interploidal sympatric zone between E. fulgens (2n = 2x = 24) and E. puniceoluteum (2n = 4x = 56) were analyzed using cytogenetic techniques to elucidate the formation and establishment of interploidal hybrids. Hybrids were not a uniform group: two chromosome numbers were observed, with the variation being a consequence of severe hybrid meiotic abnormalities and backcrossing with E. puniceoluteum. The hybrids were triploids (2n = 3x = 38 and 40) and despite the occurrence of enormous meiotic problems associated with triploidy, the hybrids were able to backcross, producing successful hybrid individuals with broad ecological distributions. In spite of the nonpolyploidization of the hybrid, its formation is a long-term evolutionary process rather than a product of a recent disturbance, and considering other sympatric zones in Epidendrum, these events could be recurrent.

show abstract

Phylogenetic relationships and infrageneric classification of Epidendrum subgenus Amphiglottium (Laeliinae, Orchidaceae)

Cited by 39 publications

References 26 publications

Research Article Chromosome variations and diversity of Epidendrum ibaguense Lindl. (Orchidaceae) on the Tepequém's Tepuy, Roraima, Brazil.

Research Article Chromosome variations and diversity of Epidendrum ibaguense Lindl. (Orchidaceae) on the Tepequém's Tepuy, Roraima, Brazil.

Salt tolerance in a neotropical orchid in the absence of local adaptation to salt spray

Interploidy hybridization in sympatric zones: the formation ofEpidendrum fulgens × E. puniceoluteumhybrids (Epidendroideae,Orchidaceae)

Contact Info

Product

Resources

About