Palinotaxonomia de Besleria L. e Napeanthus Gardn. (Beslerieae/Napeantheae - Gesneriaceae) com ênfase nas espécies ocorrentes no Estado de São Paulo

Abstract

-(Palynotaxonomy of Besleria L. and Napeanthus Gardn. (Beslerieae/Napeantheae -Gesneriaceae) specially species occurring in São Paulo State). This paper presents a study of the pollen grains of three species of Besleria L. (B. longimucronata Hoehne, B. selloana Klotzsch & Hanst., B. umbrosa Mart.) and one of Napeanthus (Napeanthus primulifolius (Raddi) Sandw.) from São Paulo state and Napeanthus reitzii (L. B. Sm.) B. L. Burtt ex Leeuwenb. occurring in southern Brazil. The pollen material was acetolysed, measured, described and illustrated using light microscopy. For further details of pollen surface and exine, non-acetolysed pollen grains were analyzed by means of scanning and transmission electron microscopy. The pollen grains of Besleria and Napeanthus are small to medium size, isopolar, oblate spheroidal, 3-colporate, endoaperture lolongate, psilate-perforate (B. longimucronata), rugulate (B. umbrosa) and microreticulate (B. selloana, N. primulifolius e N. reitzii). The results demonstrated the taxonomic importance of pollen morphology studies corroborating with the subdivision of the taxa in these tribes.

Pollen morphology in Brazilian species of Codonanthe (Mart.) Hanst. and Nematanthus Schrader (Gesneriaceae)

“…Reticulate pollen grains, tricolpate or tricolporate, such as we observed here were also found in Brazilian neotropical species of other genera than studied here (Campos, 1962;Melhem & Mauro, 1973;Melhem et al, 2003;Fourny et al, 2010;Gasparino et al, 2011) and some genera of paleotropical Gesneriaceae (Luegmayr 1993a(Luegmayr , 1993bPalee et al, 2003). However, the peculiar features such as a reticulum with large lumina surrounded by a microreticulum and perforations, and also duplicolumellate muri, had not been documented for the pollen grains of species of Gesneriaceae analysed to date.…”

“…There are only a few studies on pollen morphology of species of New World Gesneriaceae, and papers dealing with Brazilian species are restricted to the studies of Campos (1962), Melhem and Mauro (1973), Melhem et al (2003), Fourny et al (2010) and Gasparino et al (2011). According to these …”

Flora polínica da reserva do parque estadual das fontes do Ipiranga (São Paulo, SP, Brasil). Famílias: 141-Boraginaceae e 149-Gesneriaceae

“…Para Gesneriaceae foram descritos grãos de pólen em mônades, isopolares, pequenos a grandes, âmbito subcircular, circular, circular-lobado a subtriangular, prolatos, subprolatos, prolato-esferoidais, oblatoesferoidais, suboblatos a oblatos, 3-colpados, (2-)3(-4)-colporados, colporoidados, colpos longos ou curtos, estreitos ou largos, endoaberturas lalongadas, lolongadas ou circulares, exina reticulada, microrreticulada, psilada, perfurada, rugulada, verrugosa ou fossulada (Erdtman 1952, Campos 1962, Melhem & Mauro 1973, Salgado-Labouriau 1973, Nowicke 1974, Howard 1975, Williams 1978, Felice et al 1981, Fritze & Williams 1988, Roubik & Moreno 1991, Luegmayr 1993a, b, Yan et al 1995, Xifreda 1996, Yan et al 1997, Schlag-Edler & Kiehn 2001, Melhem et al 2003, Palee et al 2003, Weber 2004, Gasparino 2008, Fourny et al 2010, Gasparino et al 2011, 2013.…”

Pollen morphology in Brazilian species of Gloxiniinae (Gesneriaceae): variation in apertures and pattern of ornamentation

“…Gasparino et al (2010) summarized some palynological studies of Gesneriaceae, emphasizing the importance of pollen morphology for taxa circumscription. Besides the recently developed studies based on molecular characters, pollen morphology studies represent an additional tool for improving delimitation of genera and species in Gesneriaceae, as advocated by Fritze and Williams (1988) and Gasparino et al (2011).…”