The diversity and evolution of pollination systems in large plant clades: Apocynaceae as a case study

Large clades of angiosperms are often characterized by diverse interactions with pollinators, but how these pollination systems are structured phylogenetically and biogeographically is still uncertain for most families. Apocynaceae is a clade of >5300 species with a worldwide distribution. A database representing >10 % of species in the family was used to explore the diversity of pollinators and evolutionary shifts in pollination systems across major clades and regions.The database was compiled from published and unpublished reports. Plants were categorized into broad pollination systems and then subdivided to include bimodal systems. These were mapped against the five major divisions of the family, and against the smaller clades. Finally, pollination systems were mapped onto a phylogenetic reconstruction that included those species for which sequence data are available, and transition rates between pollination systems were calculated.Most Apocynaceae are insect pollinated with few records of bird pollination. Almost three-quarters of species are pollinated by a single higher taxon (e.g. flies or moths); 7 % have bimodal pollination systems, whilst the remaining approx. 20 % are insect generalists. The less phenotypically specialized flowers of the Rauvolfioids are pollinated by a more restricted set of pollinators than are more complex flowers within the Apocynoids + Periplocoideae + Secamonoideae + Asclepiadoideae (APSA) clade. Certain combinations of bimodal pollination systems are more common than others. Some pollination systems are missing from particular regions, whilst others are over-represented.Within Apocynaceae, interactions with pollinators are highly structured both phylogenetically and biogeographically. Variation in transition rates between pollination systems suggest constraints on their evolution, whereas regional differences point to environmental effects such as filtering of certain pollinators from habitats. This is the most extensive analysis of its type so far attempted and gives important insights into the diversity and evolution of pollination systems in large clades

The diversity and evolution of pollination systems in large plant clades: Apocynaceae as a case study

Background and Aims Large clades of angiosperms are often characterized by diverse interactions with pollinators, but how these pollination systems are structured phylogenetically and biogeographically is still uncertain for most families. Apocynaceae is a clade of >5300 species with a worldwide distribution. A database representing >10 % of species in the family was used to explore the diversity of pollinators and evolutionary shifts in pollination systems across major clades and regions. Methods The database was compiled from published and unpublished reports. Plants were categorized into broad pollination systems and then subdivided to include bimodal systems. These were mapped against the five major divisions of the family, and against the smaller clades. Finally, pollination systems were mapped onto a phylogenetic reconstruction that included those species for which sequence data are available, and transition rates between pollination systems were calculated. Key Results Most Apocynaceae are insect pollinated with few records of bird pollination. Almost three-quarters of species are pollinated by a single higher taxon (e.g. flies or moths); 7 % have bimodal pollination systems, whilst the remaining approx. 20 % are insect generalists. The less phenotypically specialized flowers of the Rauvolfioids are pollinated by a more restricted set of pollinators than are more complex flowers within the Apocynoids + Periplocoideae + Secamonoideae + Asclepiadoideae (APSA) clade. Certain combinations of bimodal pollination systems are more common than others. Some pollination systems are missing from particular regions, whilst others are over-represented. Conclusions Within Apocynaceae, interactions with pollinators are highly structured both phylogenetically and biogeographically. Variation in transition rates between pollination systems suggest constraints on their evolution, whereas regional differences point to environmental effects such as filtering of certain pollinators from habitats. This is the most extensive analysis of its type so far attempted and gives important insights into the diversity and evolution of pollination systems in large clades

Phylogenetic Relationships of Secamonoideae Based on the Plastid Gene matK, Morphology, and Biomechanics

Volume: 88Start Page: 583End Page: 60

Une nouvelle espèce de <i>Verbascum</i> L. (Scrophulariaceae) de la province de Gilan (Iran), basée sur des caractères morphologiques et moléculaires

Une nouvelle espèce endémique de la province de Gilan dans le nord de l’Iran : Verbascum parsana Sotoodeh, Attar &amp; Civeyrel, sp. nov. est décrite. Considérant la combinaison de certaines caractéristiques comme des fleurs solitaires et sans bractéoles, des poils violets sur les filaments des anthères, la taille du pédoncule floral entre 3 et 10 mm, les feuilles basales pétiolées et les poils étoilés ou glanduleux, cette nouvelle espèce est proche de Verbascum punalense Boiss. &amp; Buhse, mais diffère par plusieurs caractères concernant la forme des anthères, la longueur du pétiole des feuilles basales, la taille de la corolle et les poils du calice. Nous avons réalisé une analyse de distance en comparant les séquences de ces espèces avec ITS et des régions plastidiques (trnS-G, trnL-F, trnH-psbA et une partie de matK) et les caractères morphologiques. Les analyses de distance morphologique comme moléculaire avec les espèces proches ont montré une séparation significative avec les autres Verbascum et permettent de conclure qu’il s’agit bien d’une espèce distincte. Photos et carte de distribution sont présentées.A new endemic species from north of Iran: Verbascum parsana Sotoodeh, Attar &amp; Civeyrel, sp. nov. is described. Considering the combination of some characteristics like ebracteolate and single flowers, violet hairs on filaments, pedicel size between 3 to 10 mm and stellate-glandular indumentum, the new species is related to Verbascum punalense Boiss. &amp; Buhse, but several differences have been observed between the two species: the shape of the anthers, the petiole of basal leaves, the corolla size and the calyx hairs. We investigate the genetic distance of the new species with close genera using ITS and plastid regions (trnS-G, trnL-F, trnH-psbA and partial matK). The new species showed significant molecular and morphological distance from closely related species. Photos and distribution map are presented.</p

A new species of Pentopetia (Asclepiadaceae) from Madagascar

Volume: 19Start Page: 267End Page: 27

Phylogénie moléculaire des secamonoideae (Apocynaceae S.L.) (histoire biogéographique et évolution des formes de croissance)

TOULOUSE3-BU Sciences (315552104) / SudocSudocFranceF

Verbascum birjandense and V. urumiense (Scrophulariaceae), two new endemic species for Flora of Iran

International audienceVerbascum birjandense and V. urumiense are described as new endemic species of Verbascum from eastern and northwestern Iran. It was not possible to assign the samples of these two taxa to any of the known Verbascum species in Iran and adjacent regions. Collating the morphological characters of the samples against the specialized and pertinent literature of the genus led us to propose them as new species. Both belong to section Bothrosperma, subsection Fasciculata. These new species are morphologically close to V. erianthum and V. songaricum based on some key characteristics, but show some differences in basal leaves shape, pedicel size, the ratio of pedicel to calyx, presence of hairs inside the corolla, and the hair color of the stamen’s filaments. Distribution map and details of important characters are also presented

New findings in Onosma section Protonosma (Boraginaceae) using morphological and molecular evidence

International audienceDuring a survey of the genus Onosma L. section Protonosma Popov subsect. Rostellatae Riedl, we examined several populations assigned to Onosma rostellata Lehm. (sensu lato) using morphology and molecular evidence. Our morphological review revealed a hairy corolla outside in all specimens, an anther length equal to the filament length, and nectariferous rings hairy or glabrous, as opposed to the descriptions provided in Flora Iranica and Flora of Turkey. We updated itsdescription which were in contradiction with the character states found on the type specimen. Five new taxa were identified among the specimens identified as O. rostellata to date and described based on molecular data and morphological examination: Onosma khatamsazii Attar, Mirtadzadini & Sotoodeh ? a new species from Kermanshah province, O. fareghanensis Attar, Mirtadzadini & Sotoodeh ? a new species from the mountainous region of the north of Hormozgan province, and Onosma maharluensis Attar, Mirtadzadini & Sotoodeh ? a new species including two subspecies, namely ?O. maharluensis Attar, Mirtadzadini & Sotoodeh subsp. maharluensis and O. maharluensis subsp. boyer-ahmadica Attar, Sotoodeh & Mirtadzadini? from Iran

Nomenclature and typification in Verbascum (Scrophulariaceae) from North Africa

The progress of taxonomic work on native Verbascum L. taxa found in Morocco led to a search for reference specimens in various herbaria. This process was extended to the taxa found in the other four countries of North Africa (Algeria, Tunisia, Libya, and Egypt), which make up the southern shore of the Mediterranean basin. Numerous names were identified as needing typification or requiring corrections of their earlier lectotypifications in order to stabilize their nomenclature and provide a better definition of each taxon. As a result, lectotypes are now designated for 35 names, a neotype is proposed for V. ballii (Batt.) Hub.-Mor., and second-step lectotypes are proposed for V. faurei subsp. acanthifolium (Pau) Benedí & J.M.Monts. and V. pinnatisectum (Batt.) Benedí. Comments have been added for each typified name. Known isolectotypes are also mentioned whenever possible. Furthermore, some new combinations are proposed in this paper, namely V. longirostre var. antiatlantica (Emb.) Khamar, comb. nov., V. longirostre var. atlantica (Maire) Khamar, comb. nov., and V. longirostre var. hoggarica (Maire) Khamar, comb. nov

Molecular systematics, character evolution, and pollen morphology of Cistus and Halimium (Cistaceae)

Pollen analysis and parsimony-based phylogenetic analyses of the genera Cistus and Halimium, two Mediterranean shrubs typical of Mediterranean vegetation, were undertaken, on the basis of cpDNA sequence data from the trnL-trnF, and trnS-trnG regions, to evaluate limits between the genera. Neither of the two genera examined formed a monophyletic group. Several monophyletic clades were recognized for the ingroup. (1) The “white and whitish pink Cistus”, where most of the Cistus sections were present, with very diverse pollen ornamentations ranging from striato-reticulate to largely reticulate, sometimes with supratectal elements; (2) The “purple pink Cistus” clade grouping all the species with purple pink flowers belonging to the Macrostylia and Cistus sections, with rugulate or microreticulate pollen. Within this clade, the pink-flowered endemic Canarian species formed a monophyletic group, but with weak support. (3) Three Halimium clades were recovered, each with 100% bootstrap support; all Halimium species had striato-reticulate pollen. Two Halimium clades were characterized by yellow flowers, and the other by white flowers