Pollen morphology of the tribe Dorstenieae (Moraceae)

Hoen, P.P.; Punt, W.

doi:10.1016/0034-6667(89)90020-1

Cited by 13 publications

(11 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nos grãos de pólen pantoaperturados com poucas aberturas, 7-20, as mesmas foram contadas; enquanto que nos grãos de pólen com mais de 30 aberturas, esse número foi estimado com base no "método 1/3" proposto por Hoen & Punt (1989). Em microscopia óptica, o número de poros foi contado sobre um dos lados até o limite da nexina, correspondendo à 1/3 do número total (1/3 é considerado para o outro lado e 1/3 está presente na região do contorno dos grãos de pólen).…”

Section: Methodsunclassified

Morfologia polínica de espécies das tribos Ipomoeeae Hallier f. e Merremieae D.F. Austin (Convolvulaceae) ocorrentes numa região de ecótono do município de Caetité, BA, Brasil

Vasconcelos

Saba

Junqueira

et al. 2015

Hoehnea

View full text Add to dashboard Cite

-(Pollen morphology of species from tribes Ipomoeeae Hallier f. and Merremieae D.F. Austin, Convolvulaceae, occurring in an ecotonal region of the municipality of Caetité, Bahia State, Brazil). This pollen morphology study of species of the tribes Ipomoeeae and Merremieae (Convolvulaceae) aims to contribute to the knowledge of palynology of the taxa studied and to the taxonomy of the group. Ten species of Ipomoea, one of Turbina (Ipomoeeae tribe), and four species of Merremia (Merremieae tribe) occurring in the flora of the Brejinho das Ametistas, Caetité, Bahia State, Brazil were examined. The pollen grains were acetolysed, measured, described, and illustrated under light microscopy (LM) and scanning electron (SEM) microscopy. By analyzing the pollen morphology of the taxa studied, it was possible to confirm the euripollinic character of the group and to recognize two pollen types based upon the apertural type and the exine ornamentation: 1) pantoporate, echinate pollen grain; 2) 3-6-colpate, microechinate, granulate pollen grain.

show abstract

Section: Methodsunclassified

Morfologia polínica de espécies das tribos Ipomoeeae Hallier f. e Merremieae D.F. Austin (Convolvulaceae) ocorrentes numa região de ecótono do município de Caetité, BA, Brasil

Vasconcelos

Saba

Junqueira

et al. 2015

Hoehnea

View full text Add to dashboard Cite

show abstract

“…Pollen morphology is considered as a phylogenetic conserved trait and has been used in systematic studies in some families, such as Acanthaceae [3], Moraceae [4]–[6], Scrophulariaceae [7] and Orchidaceae [8], [9]. Many other studies suggest a strong correlation between pollen characters and pollination mode [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Has Pollination Mode Shaped the Evolution of Ficus Pollen?

Wang

Chen

et al. 2014

PLoS ONE

View full text Add to dashboard Cite

BackgroundThe extent to which co-evolutionary processes shape morphological traits is one of the most fascinating topics in evolutionary biology. Both passive and active pollination modes coexist in the fig tree (Ficus, Moraceae) and fig wasp (Agaonidae, Hymenoptera) mutualism. This classic obligate relationship that is about 75 million years old provides an ideal system to consider the role of pollination mode shifts on pollen evolution.Methods and Main FindingsTwenty-five fig species, which cover all six Ficus subgenera, and are native to the Xishuangbanna region of southwest China, were used to investigate pollen morphology with scanning electron microscope (SEM). Pollination mode was identified by the Anther/Ovule ratio in each species. Phylogenetic free regression and a correlated evolution test between binary traits were conducted based on a strong phylogenetic tree. Seventeen of the 25 fig species were actively pollinated and eight species were passively pollinated. Three pollen shape types and three kinds of exine ornamentation were recognized among these species. Pollen grains with ellipsoid shape and rugulate ornamentation were dominant. Ellipsoid pollen occurred in all 17 species of actively pollinated figs, while for the passively pollinated species, two obtuse end shapes were identified: cylinder and sphere shapes were identified in six of the eight species. All passively pollinated figs presented rugulate ornamentation, while for actively pollinated species, the smoother types - psilate and granulate-rugulate ornamentations - accounted for just five and two among the 17 species, respectively. The relationship between pollen shape and pollination mode was shown by both the phylogenetic free regression and the correlated evolution tests.ConclusionsThree pollen shape and ornamentation types were found in Ficus, which show characteristics related to passive or active pollination mode. Thus, the pollen shape is very likely shaped by pollination mode in this unique obligate mutualism.

show abstract

“…The pollen morphology of Broiissomfia and Alolasia exhibit characteristics similar to the other moraceous and hamamelidaceous taxa (Punt 1978 Hoen & Punt 1989). These features include the porate apertures, the scabrate exine sculpturing, the exinal microchannels and the spherical to slightly oblate shape.…”

Section: Discussionmentioning

confidence: 76%

“…Punt (1978), and Hoen and Punt (1989) examined pollen of the Tribe Dorstenieae (Corner 1962) and the Tribe Brosimeae. Niczgoda and Nowaczyk (1976) examined four genera with SEM, they are, Clnrisin, Sorocen (Tribe Euartocarpeae), Tropliis (Tribe Moreae) and Acaritliinopliylliitx, and Punt and Eetgerink (1982) reported on the pollen morphology of various taxa in the Tribe Moreae.…”

mentioning

confidence: 99%