Viability and meiotic index of Ochroma pyramidale                     from the Brazilian Amazon

Géssica Tais  Zanetti; Ana Aparecida Bandini  Rossi; Kelli Évelin Müller  Zortéa; Joameson Antunes  Lima; Maurecilne Lemes da  Silva; Maurel  Behling; Eulalia Soler Sobreira  Hoogerheide

Viability and meiotic index of Ochroma pyramidale from the Brazilian Amazon

Autores

Géssica Tais Zanetti

Ana Aparecida Bandini Rossi

Kelli Évelin Müller Zortéa

Joameson Antunes Lima

Maurecilne Lemes da Silva

Maurel Behling

Eulalia Soler Sobreira Hoogerheide

Editor

Universidade Federal de Goiás

Descripción

Ochroma pyramidale is a neotropical tree species native to Central and South America, occurring naturally in the Brazilian Amazon and cultivated in the Mato Grosso state, Brazil, where it is used for timber production and ecological restoration. This study aimed to investigate the pollen viability and meiotic behaviour of O. pyramidale (Cav. ex Lam.) Urb., factors that directly influence the species’ reproductive success. Flower buds at various developmental stages were collected from six individuals to assess the pollen grain morphology, pollen viability and meiotic index. The pollen viability (mean values of 96.16 and 97.72 %, using acetocarmine and the Alexander’s stain, respectively) and meiotic index (average of 96.53 %) were high across all individuals, presenting regularity and stability in the meiosis process.