Tibouchina papyrus explained

Tibouchina papyrus Toledo was described in 1952.[1] Tibouchina papyrus is a narrow endemic to the campos rupestres and is mainly found in three localities in the states of Goiás and Tocantins in central Brazil, including the Serra da Natividade.[2] [3] Abreu et al. found that T. papyrus is a habitat-specialist on rocky outcrop cerrado which typically has shallow substrate and uneven topography, with sandstone soils and quartzite outcrops.[4] [5] This species has been collected at elevations between 500 metres and 1,100 metres. T. papyrus is listed as vulnerable by the IUCN.[6] Tibouchina papyrus is locally known as “pau-papel”.[7]

The flowers of T. papyrus are buzz pollinated by large bees in the genera Xylocopa, Bombus and Centris, and the seeds are wind dispersed (autochory).[8] Flowers have higher fruit production when cross-pollinated although they are not self-incompatible and can produce low numbers of fruit when self-pollinated. One study of microsatellite loci showed low levels of polymorphism and low genetic diversity within populations, while another study found that populations of T. papyrus are highly differentiated with little to no gene flow between populations.

Notes and References

  1. Web site: Tropicos Name - Tibouchina papyrus Toledo. www.tropicos.org. 2017-03-21.
  2. Guimarães. Paulo José Fernandes. 84301952. 2014. Two New Species of Tibouchina (Melastomataceae) from Brazil. Novon. 23 . 1. 42–46. 10.3417/2012029.
  3. Collevatti. Rosane Garcia. Lima. Jacqueline Silva. Soares. Thannya Nascimento. Telles. Mariana Pires de Campos. 2010. Spatial Genetic Structure and Life History Traits in Cerrado Tree Species: Inferences for Conservation. Natureza & Conservação. 8 . 1. 54–59. 10.4322/natcon.00801008. free.
  4. Abreu. Mariângela Fernandes. Pinto. José Roberto Rodrigues. Maracahipes. Leandro. Gomes. Letîcia. de Oliveira. Edmar Almeida. Marimon. Beatriz Schwantes. Marimon. Ben Hur Junior. de Farias. Josenilton. Lenza. Eddie. 2012. Influence of edaphic variables on the floristic composition and structure of the tree-shrub vegetation in typical and rocky outcrop cerrado areas in Serra Negra, Goiás State, Brazil. Brazilian Journal of Botany. 35 . 3. 259–272. 10.1590/s1806-99592012000300005. free.
  5. Collevatti. Rosane Garcia. de Castro. Thaîs Guimarães. Lima. Jacqueline de Souza. Telles. Mariana Pires de Campos. 2012. Phylogeography of Tibouchina papyrus (Pohl) Toledo (Melastomataceae), an endangered tree species from rocky savannas, suggests bidirectional expansion due to climate cooling in the Pleistocene. Ecology and Evolution. 2 . 5. 1024–1035. 10.1002/ece3.236. 22837846. 3399167. free.
  6. Web site: The IUCN Red List of Threatened Species. www.iucnredlist.org. 2017-03-21.
  7. Telles. M.P.C. Peixoto. F.P.. Resende. J.S.. Vianello. R.P.. Walter. M.E.M.T.. Collevatti. R.G.. 2011. Development of microsatellite markers for the endangered Neotropical tree species Tibouchina papyrus (Melastomataceae). Genet. Mol. Res.. 10 . 1. 321–325. 10.4238/vol10-1gmr1026. 21365547. free.
  8. Montoro. Gustavo Ribeiro. dos Santos. Mirley Luciene. 2007. Fenologia e Biologia Reprodutiva de Tibouchina papyrus (Pohl) Toledo (melastomataceae) no Parque Estadual da Serra dos Pireneus, Goiás. Revista de Biologia Neotropical. 4 . 1. 21–29. 10.5216/rbn.v4i1.4654. free.

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