SciELO - Scientific Electronic Library Online

vol.70In vitro propagation of Bucquetia glutinosa, endemic species of the Colombian ParamosVerbenaceae in the Parque Estadual da Serra do Papagaio, Minas Gerais, Brazil author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links



Print version ISSN 0370-6583On-line version ISSN 2175-7860


SILVA, Cleber José da; RIBEIRO, João Paulo Oliveira  and  MEIRA, Renata Maria Strozi Alves. New registers of colleters in species of Myrtaceae from Brazilian Cerrado. Rodriguésia [online]. 2019, vol.70, e02822017.  Epub Oct 03, 2019. ISSN 2175-7860.

Colleters are secretory structures that produce a sticky substance, consisting of a mixture of mucilage, proteins, terpenes, pectic substances and even alkaloids, which lubricates and protects the shoot apical meristem. Several colleter types have been described and have taxonomic value in many botanical families. In Myrtaceae, the colleters description is recent and presents three new morphological types (conic, euryform and petaloid) that differ those already described for other eudicots. In this work, we report the colleters morphological types in six species of three genera belonging to the Myrteae tribe of Myrtoideae from the Brazilian Cerrado. The samples were fixed for light and scanning electron microscopy. Histochemical tests were carried out on the fresh and methacrylate-embedded material. The conic and euryform colleters from Myrtoideae species of the Cerrado did not differ either morphologically nor as to the secretion nature from those described for Myrtoideae species from others biomes, which may indicate their potential use for taxonomic purposes. Considering the hypothesis that the multiple fleshy-fruit lineages have evolved independently in Myrteae tribe, our results indicate the relevance of additional studies in order to recognize the pattern of distribution of colleters in Myrtaceae.

Keywords : histochemistry; mucilage; Myrtoideae; secretory structure; vegetative meristems.

        · abstract in Portuguese     · text in English     · English ( pdf )