Pollen morphology of selected species of Passiflora L. (Passifloraceae) from the Atlantic Forest

Acta Botanica Brasilica

Ana Carolina Mezzonato-pires¹  Cláudia Barbieri Ferreira Mendonça¹  Vania Gonçalves-esteves¹ 

关键词: Atlantic Forest;    palynotaxonomy;    Passiflora;    Passifloraceae;    sandbanks;   

DOI  :  10.1590/0102-33062015abb0014

来源: SciELO

【 摘 要 】

Pollen grains from twelve species of the Passifloraceae family from the Brazilian Atlantic Forest were analyzed: Passiflora subg. Astrophea (1sp.), P.subg. Decaloba (1sp.) and P.subg. Passiflora (10spp.). The current study aims to acquire additional information and feature the pollen morphology of the herein studied species to help setting a more precise taxa delimitation. Acetolyzed pollen grains were measured, described and illustrated using light and scanning electron microscopy. The pollen grains were medium or large sized, oblate spheroidal, suboblate, prolate spheroidal and subprolate; 4-colpate (P. kermesina), 6-12-pantocolporate (P. mediterranea), 6-colpate (P. mucronata), 6-colporate (P. pentagona), 12-colporate (P. misera) or 6-syncolpate (in most species). The presence of reticulate sexine, pseudopercula, pontopercula and/or opercula was observed. The endoaperture was just found in P. pentagonaand P. misera. It was concluded that pollen morphology is an important source of taxonomic features useful for distinguishing species and characterizing the three subgenera. The current study provides additional information that, along with other previously published studies, will enable a better understanding of phylogenetic relations among these strains.

【 授权许可】

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