Search results for "MECO(n)"
showing 10 items of 25 documents
<I>The Genus</I> Meconopsis. <I>Blue Poppies and Their Relatives</I> (2014) by C. Grey-Wilson
2016
Morphological evolution and ecological diversification of the forest-dwelling poppies (Papaveraceae: Chelidonioideae) as deduced from a molecular phy…
1999
Sequences of the ITS region of nrDNA were analyzed for the seven genera of Papaveraceae subf. Chelidonioideae s.str. Three major clades can be recognized. These are 1.Chelidonium/Hylomecon/Stylophorum, 2.Eomecon/Sanguinaria, and 3.Bocconia/Macleaya. The monophyly of genera in the first of these three clades is doubtful, and clades two and three are sister to each other. Use of the ITS phylogeny of the subfamily to trace its morphological and ecological evolution shows that morphological change is concentrated in theBocconia/Macleaya clade, and probably related to the evolution of wind-pollination from insect-pollination in these two genera after habitat shift.
Three intercontinental disjunctions in Papaveraceae subfamily Chelidonioideae: evidence from chloroplast DNA
1995
An RFLP analysis of the chloroplast genome of Papaveraceae subfam. Chelidonioideae resulted in one most parsimonious tree consisting of three monophyletic groups. Each group contains intercontinental disjunct taxa. Whereas Eomecon/Sanguinaria and Stylophorum are examples for the well known E Asian — eastern N American disjunction, the E Asian -C and S American disjunction in Macleaya/Bocconia is rare. The genus Stylophorum in this analysis is paraphyletic. The N American Stylophorum diphyllum is sister group to the Old World members of Stylophorum and Chelidonium. All American representatives of the subfamily possess distinctive morphological features. This might be the result of Tertiary a…
Molecular phylogeny of the Old World representatives of Papaveraceae subfamily Papaveroideae with special emphasis on the genus Meconopsis
1995
The RFLP-analysis of PCR amplified cpDNA fragments of 42 representatives of Papaveraceae subfam. Papaveroideae resulted in six most parsimonious cladograms. The subfamily can be divided into a New World group (Arctomecon, Argentone, Canbya, Romneya and Platystemon) and an Old World group (Meconopsis, Papaver s.l. and Roemeria) containing Stylomecon heterophylla and Papaver californicum as New World taxa. In the Old World group neither Meconopsis nor Papaver are monophyletic. Whereas Meconopsis consists of three clades, Papaver comprises five clades, with Roemeria as sister group to P. sect. Argemonidium and Stylomecon as sister group to P. californicum. Various lines of evidence suggest tha…
The phylogeny ofPapaver s. l. (Papaveraceae): Polyphyly or monophyly?
1997
An RFLP analysis of the chloroplast genetrnK of 32 species of the generaPapaver, Roemeria, Stylomecon, andMeconopsis leads to the following conclusions: (1) AsianMeconopsis consists of two distinct clades and is paraphyletic in relation toPapaver, Roemeria, Stylomecon, and the W EuropeanMeconopsis cambrica. (2) Sister group relationships ofRoemeria toPapaver sect.Argemonidium and ofStylomecon toPapaver californicum are well-supported. (3)Meconopsis cambrica is nested withinPapaver (incl.Roemeria andStylomecon). The consideration of morphology, geographical distribution and ecology leads to the conclusion thatM. cambrica is best regarded as a member ofMeconopsis, and thatPapaver arose polyph…
Behavioral responses of the parasitoid Melittobia digitata to volatiles emitted by its natural and laboratory hosts
2010
Responses of macropterous females of the ectoparasitoid Melittobia digitata Dahms (Hymenoptera: Eulophidae) to direct and indirect cues emitted by its natural hosts as well as laboratory hosts were investigated using a Y-tube olfactometer. To locate the nest ofmud dauber wasps, Trypoxylon politum Say (Hymenoptera: Crabronidae), and one of their inquilines, Anthrax spec., parasitoids exploit volatiles from the freshly built nest mud and the empty cocoon constructed by the wasps, as well as their meconium. However, the parasitoids did not respond to odors emitted by older nest mud or by the host stages that are attacked (T. politum prepupae and Anthrax spec. larvae). Melittobia digitata was n…
Peritonite meconiale in una rara associazione di atresia ileale apple-peel con difetto di parete addominale
2014
L’atresia intestinale tipo III B (apple peel) e la gastroschisi sono entrambe malformazioni congenite che necessitano di correzione chirurgica precoce in epoca neonatale. La loro associazione è un evento molto raro. Presentiamo il caso di un neonato a termine con l’associazione di atresia ileale apple-peel parziale e piccolo difetto della parete addominale anteriore, complicate con perforazione intestinale in utero e conseguente peritonite meconiale. Abbiamo riscontrato un’atresia parziale delle anse intestinali, coninteressamento dell’ileo terminale e risparmio del digiuno e di buona parte dell’ileo prossimale, difetto della parete addominale di piccole dimensioni e con poche anse erniate,…
Rapid radiation of North American desert genera of the Papaveraceae: Evidence from restriction site mapping of PCR-amplified chloroplast DNA fragments
1995
Phylogenetic relationships of a group of North American desert genera of the Papaveraceae subfam. Papaveroideae and Platystemonoideae were investigated with an RFLP analysis of three PCR-amplified chloroplast genome regions. In agreement with earlier results it was found that subfam. Platystemonoideae is nested within subfam. Papaveroideae. The group under study is characterized by a large number of generic autapomorphies but only few informative synapomorphies. This is interpreted as strong evidence for a rapid radiation event caused by major climatic changes in the past. Poor phylogenetic resolution seems to reflect biological reality and not to be an experimental artifact. There is also …
Systematics, Phylogeny, and Evolution of Papaver californicum and Stylomecon heterophylla (Papaveraceae)
2011
Abstract We present a detailed comparison of Papaver californicum and Stylomecon heterophylla, which earlier were found to be sister species and most closely related to Meconopsis cambrica + Papaver s.str. from western Eurasia. The two species of winter annuals differ mainly in the shape of their distal cauline leaves, coloration of petals and staminal filaments, and most notably morphology of the gynoecium and capsule, with Papaver californicum having a sessile stigmatic disc and Stylomecon heterophylla having a distinct style. They were earlier found to differ in ploidy, with chromosome numbers of 2n = 28 (Papaver californicum) and 2n = 56 (Stylomecon heterophylla). Mapped distributio…
Evolutionary significance of the invasion of introduced populations into the native range of Meconopsis cambrica
2011
The long history of the deliberate or accidental and human-mediated dispersal of flowering plants has led to the introduction of foreign genotypes of many species into areas of Europe hitherto occupied by potentially distinct native populations. Studies of the genetic and evolutionary consequences of such changes are handicapped by the difficulty of identifying the surviving native populations of many species in the absence of clear morphological differences. We investigated the relationship between putative native and introduced populations of the herbaceous perennial Meconopsis cambrica (Papaveraceae), as the isolated native populations of this species can be identified by historical and …