01593nas a2200205 4500008004100000245007700041210006900118300001200187490000700199520096700206653002401173653001701197653002401214653001501238100002101253700001601274700002001290700002501310856005201335 2007 eng d00aCytotaxomical observations on flowering plants from the Balearic Islands0 aCytotaxomical observations on flowering plants from the Balearic a409-4150 v443 a

The mitotic chromosome numbers of 40 accessions of 33 species of vascular plants collected in the Balearic Islands are presented. The triploid cytotype of Allium commutatum (2n = 24), the tetraploid cytotype of Scilla autumnalis (2n = 28), and the hexaploid (2n = 36) and octoploid (2n = 48) cytotypes of Tuberaria guttata are reported here for the first time in the Balearic archipelago. The tetraploid cytotype of Dactylis glomerata subsp. hispanica was not previously known from the Western Balearics, where it grows sympatrically with the diploid endemic D. glomerata subsp. ibizensis. The divergent chromosome number 2n = 26 is confirmed for Micromeria inodora. A new chromosome number (2n = 44) was determined for the restricted endemic Rubia balearica subsp. caespitosa. The existence of several infraspecific cytotypes bear phytogeographical significance.

10acontinental islands10acytotaxonomy10aMediterranean flora10apolyploidy1 aCastro, Mercedes1 aFraga, Pere1 aTorres, Néstor1 aRosselló, Josep, A. uhttp://www.annbot.net/PDF/anbf44/anbf44-409.pdf01631nas a2200205 4500008004100000245012700041210006900168300001400237490000800251520095500259653002401214653001301238653000901251653002301260653002101283653002401304100002601328700002101354856005001375 2007 eng d00aInteracting influence of cold stratification treatment and osmotic potential on seed germination of Triglochin maritima L.0 aInteracting influence of cold stratification treatment and osmot a115–1220 v7233 a

The effect of cold stratification treatment and isoosmotic NaCl and polyethyleneglycol (PEG) concentrations on germination of Triglochin maritima seeds was assessed. The highest (400 mM) NaCl concentration caused a significant decrease in germination percentage and no germination was observed at the two highest (64 and 128 mM) PEG concentrations. The large difference in germination among experiment replications suggests that time of collection and length of storage may have influenced germination. Stratification treatment had a significant positive effect on seed germination and there was a significant interaction between PEG, but not NaCl, concentration and duration of cold stratification during germination. Further research is required to determine the importance of the degree of seed ripeness as well as the possible effect of after-ripening or induction of secondary dormancy of undispersed seeds on seed germination.

10acold stratification10adormancy10aNaCl10apolyethyleneglycol10aseed germination10aTriglochin maritima1 aŅečajeva, Jevgenija1 aIevinsh, Gederts uhttps://juncaginaceae.myspecies.info/node/38401519nas a2200145 4500008004100000245015100041210006900192300001000261490000800271520097700279100002201256700001901278700002601297856005001323 2007 eng d00aPhylogeographic evidence for the postglacial colonization of the North and Baltic Sea coasts from inland glacial refugia by Triglochin maritima L.0 aPhylogeographic evidence for the postglacial colonization of the a79-880 v2023 a

We investigated the geographical distribution of genetic variation in 67 individuals of Triglochin maritima from 38 localities across Europe using AFLP markers. Analysis of genetic variation resulted in the recognition of two major genetic groups. Apart from few geographical outliers, these are distributed (1) along the Atlantic coasts of Portugal, Spain and France and (2) in the North Sea area, the Baltic Sea area, at central European inland localities, the northern Adriatic Sea coast and the Mediterranean coast of southwest France. Considering possible range shifts of T. maritima in reaction to Quaternary climatic changes as deduced from the present-day northern temperature limit of the species, Quaternary changes of coastline in the North Sea area and the very recent origin of the Baltic Sea, we conclude that the coastal populations of T. maritima in the North Sea and Baltic Sea areas originated from inland populations.

1 aLambracht, Esther1 aWestberg, Erik1 aKadereit, Joachim, W. uhttps://juncaginaceae.myspecies.info/node/19601868nas a2200169 4500008004100000245006900041210006300110300001200173490000800185520126600193653010601459100001901565700002001584700002301604700002101627856005001648 2007 eng d00aThe Cape element in the Afrotemperate flora: from Cape to Cairo?0 aCape element in the Afrotemperate flora from Cape to Cairo a535-5430 v2743 aThe build-up of biodiversity is the result of immigration and in situ speciation. We investigate these two processes for four lineages (Disa, Irideae p.p. the Pentaschistis clade and Restionaceae) that are widespread in the Afrotemperate flora. These four lineages may be representative of the numerous clades which are species rich in the Cape and also occur in the highlands of tropical Africa. It is as yet unclear in which direction the lineages spread. Three hypotheses have been proposed: (i) a tropical origin with a southward migration towards the Cape, (ii) a Cape origin with a northward migration into tropical Africa, and (iii) vicariance. None of these hypotheses has been thoroughly tested. We reconstruct the historical biogeography of the four lineages using likelihood optimization onto molecular phylogenies. We find that tropical taxa are nested within a predominantly Cape clade. There is unidirectional migration from the Cape into the Drakensberg and from there northwards into tropical Africa. The amount of in situ diversification differs between areas and clades. Dating estimates show that the migration into tropical East Africa has occurred in the last 17Myr, consistent with the Mio-Pliocene formation of the mountains in this area.10ahistorical biogeography, ancestral character reconstruction, phytogeography, molecular dating, Africa1 aGalley, Chloé1 aBytebier, Benny1 aBellstedt, Dirk, U1 aLinder, Peter, H uhttps://juncaginaceae.myspecies.info/node/115