TY - JOUR T1 - Significance of palynology for phylogeny of Annonaceae: Experiments with removal of pollen characters JF - Plant Systematics and EvolutionPlant Systematics and Evolution Y1 - 1997 A1 - Doyle, J. A. A1 - LeThomas, A. SP - 133 EP - 159 KW - Annonaceae KW - cladistics KW - EVOLUTION KW - GENERA KW - Magnoliales KW - palynology KW - phylogeny KW - SYSTEMATICS KW - ULTRASTRUCTURE AB - Phylogenetic analyses based on morphology place Anaxagorea and other taxa with granular monosulcate pollen, as in other Magnoliales, at the base of Annonaceae. Taxa with columellar tetrads, granular tetrads, and inaperturate monads form a derived clade. To test the systematic importance of palynology, we analyzed the data set with pollen characters removed. The result was lower resolution and a different rooting of the family, between Uvariopsis and other groups with columellar tetrads. Anaxagorea and other monosulcates are higher in the tree, implying that granular monosulcate pollen, laminar stamens, and irregular endosperm ruminations are reversals. This rooting is highly unparsimonious when pollen characters are included, and only weakly supported over the Anaxagorea rooting when pollen is excluded. Together with preliminary molecular analyses, these experiments confirm the special value of palynology in systematics of Annonaceae. VL - 206 JO - Pl. Syst Evol. ER - TY - JOUR T1 - Characterization of Hubera (Annonaceae), a new genus segregated from Polyalthia and allied to Miliusa JF - Phytotaxa Y1 - 2012 A1 - Chaowasku, Tanawat A1 - Johnson, David M. A1 - Van der Ham, R. W. J. M. A1 - Chatrou, Lars W. KW - Malmeoideae KW - molecular systematics KW - Old World floristics KW - Paleotropics KW - palynology VL - 69 UR - http://www.mapress.com/phytotaxa/content/2012/f/pt00069p056.pdf ER - TY - JOUR T1 - Evolution and phylogenetic significance of pollen in Annonaceae JF - Botanical Journal of the Linnean Society Y1 - 2012 A1 - Doyle, James A. A1 - Le Thomas, Annick SP - 190 EP - 221 KW - angiosperms KW - Magnoliales KW - morphology KW - palynology KW - phylogeny KW - SYSTEMATICS AB - The remarkable diversity of pollen morphology in Annonaceae has attracted systematic attention since the 1970s. Optimization of pollen characters on a molecular tree confirms that granular monosulcate pollen, as in Anaxagorea and subfamily Ambavioideae, was ancestral in the family. However, granular structure is derived for angiosperms as a whole, and exine characters are highly homoplastic in Annonaceae. Because columellar taxa (Annickia, Bocageeae) diverged earlier than previously thought, columellae may have re-originated in the common ancestor of Malmeoideae and Annonoideae, which make up most of the family, with several later reversals to granular structure. In Malmeoideae, loss of the sulcus and origin of a verrucate tectum occurred in the tribe Miliuseae, followed by an uncertain number of origins of disulculate pollen. Tetrads arose several times in Annonoideae, but reverted to monads in Isolona and probably Uvarieae. Recognition that microspores rotate during development in Annona and Cymbopetalum suggests that the proximal thin area in these taxa is a modified distal sulcus, but rotation does not occur in all tetrad groups; a broader survey is needed to evaluate this phenomenon. © 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 169, 190–221. PB - Blackwell Publishing Ltd VL - 169 SN - 1095-8339 UR - http://dx.doi.org/10.1111/j.1095-8339.2012.01241.x ER -