Search results for "Papaver"
showing 10 items of 61 documents
Disassembling Papaver: a restriction site analysis of chloroplast DNA
1992
The results from a chloroplast DNA restriction site analysis of the genera Papaver and Roemeria of subf. Papaveroideae (Papaveraceae) and five outgroup taxa are presented. Papaver is represented by 14 species of eight of the 11 sections recognized, Roemeria by two of its three species. Hunnemannia fumariifolia (subf. Eschscholzioideae), Chelidonium majus (subf. Chelidonioideae), Romneya coulteri, Argemone munita and Stylomecon heterophyllum (all subf. Papaveroideae) were chosen as outgroups. DNAs were digested with 24 restriction enzymes. The major results from this analysis are: 1. Papaver, Roemeria and Stylomecon form a monophyletic group supported by at least 17 restriction site mutation…
A survey of the weedy communities of Sicily
2007
As Sicily has been a central crossroads of human activity for thousands of years, it offers a major perspective on the Mediterranean weedy plant communities. This syntaxonomical survey of the Sicilian weedy vegetation groups together for the first time 30 plant associations, that have been described from the main and neighboring island in the last three decades. The surveyed vegetation is ascribed to the classes Papaveretea rhoeadis and Stellarietea mediae, whose floristic autonomy is here discussed, and to the orders Aperetalia spicae-venti and Papaveretalia rhoeadis for the former, Polygono-Chenopodietalia polispermi, Solano-Polygonetalia convolvuli, Thero-Brometalia and Urtico-Scrophular…
Effect of Intra-Arterial Infusion of Papaverine Hydrochloride on Brain Tissue Oxygen Pressure in the Management of Severe Vasospasm Following Aneurys…
2001
Despite considerable advances in diagnostic, surgical and interventional techniques, the overall outcome for patients with aneurysmal subarachnoid hemorrhage remains poor. Concerning perioperative course, cerebral ischaemia is one of the major factors causing secondary brain demage. The aim of all therapeutic interventions is the stabilization and maintance of cerebral blood flow and tissue oxygenation in order to prevent cerebral ischaemia and consecutively brain infarction [1].
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…
A revision of Papaver sect. Meconidium
2010
The biennial Papaver L. sect. Meconidium Spach (Papaveraceae) is considered to contain four species: P. libanoticum Boiss. with subspp libanoticum and polychaetum (Schott & Kotschy ex Boiss.) Kadereit comb. et stat. nov., P. armeniacum (L.)DC. with subspp armeniacum, microstigmum (Boiss.) Kadereit comb. et stat. nov. and pilgerianum (Fedde) Kadereit comb. et stat. nov., P. curviscapum Nab., and P. persicum Lindl. with subspp persicum, tauricolum (Boiss.) Kadereit comb. et stat. nov. and microcarpum (Boiss.) Kadereit comb. et stat. nov. A key to species and subspecies is given, capsules and leaves of all taxa are illustrated, and distribution maps are provided.
Highly Efficient Virus-induced Gene Silencing (VIGS) in California Poppy (Eschscholzia californica): An Evaluation of VIGS as a Strategy to Obtain Fu…
2007
†Background and Aims Eschscholzia californica (California poppy) is an emerging model plant for ‘evo‐devo’ studies from the basal eudicot clade of Papaveraceae. California poppy has a relatively small genome, a short life cycle and, most importantly, it is amenable for transformation. However, since this transformation protocol is time consuming, virus-induced gene silencing (VIGS) was evaluated as a fast method to obtain functional data for California poppy genes. †Methods Commercially available California poppy plants were infiltrated with Agrobacterium tumefaciens carrying the tobacco rattle virus plasmids pTRV1 and pTRV2. pTRV2 contained part of the eschscholzia Phytoene Desaturase (EcP…
An “omic” approach towards molecular diagnosis of resistance to auxinic herbicides in Corn poppy (Papaver rhoeas)
2021
National audience; Papaver rhoeas (corn poppy) is a major, troublesome weed in winter crops. In conventionalagriculture, poppy control is essentially achieved through herbicide application. Followingintensive use of these substances, resistance has evolved in many poppy populations across itsrange in Europe. Among the herbicide modes of action concerned by resistance are auxinmimeticherbicides (HRAC group 4/O). Resistance to this mode of action has little beeninvestigated, and its determinants remain largely unknown. Literature data suggests that, whiletarget-site-based resistance exist, non-target-site-based resistance mechanisms may bepredominant. Target-site-based resistance to auxinic h…
Résistance du coquelicot aux inhibiteurs de l'ALS: La mise au point d'outils de diagnostic rapide a permis de révéler la présence de cette résistance…
2011
National audience; Les inhibiteurs de l'acétolactate-synthase (ALS) sont actuellement la principale famille d'herbicides utilisés en France. La capacité de diagnostiquer rapidement la présence de plantes résistantes dans les parcelles contribue au maintien de leur efficacité. Des tests « ADN » ont été développés chez les coquelicots (Papaver rhoeas, Papaver dubium et Papaver argemone) pour détecter les mutations de l'ALS conférant une résistance à des herbicides. Les tests ont servi à analyser des plantes de coquelicots provenant de parcelles où des échecs de contrôle par des inhibiteurs de l'ALS ont été observés. Ils ont révélé la présence de mutations de l'ALS en fréquences élevées dans 2…
Occurrence of non-target-site-based resistance to ALS inhibitors in the broadleaf weed Papaver rhoeas (corn poppy).
2013
The vast majority of reported cases of resistance to ALS inhibitors in broadleaves is due to the selection of mutant, herbicide-resistant ALS alleles carrying a mutation at one of a few ALS codons that can be easily identified (ALS-based resistance). Non-ALS-based resistance (non-target-site resistance, NTSR), considered to be endowed by differences in the expression of many genes, has essentially been reported in grasses and hardly ever in broadleaves. We investigated NTSR to ALS inhibitors in poppy by pairing plants resistant to ALS inhibitors with susceptible plants and subsequently analysing the segregation of resistance in F1 families. Poppy plants resistant to ALS inhibitors were geno…