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Wild ornamental germplasm exploration and domestication based on biotechnological approaches: In vitro colchicine treatment to obtain a new cultivar of Scoparia montevidiensis Electron. J. Biotechnol.
Escandón,Alejandro S; Miyajima,Ikuo; Alderete,Marisol; Hagiwara,Juan Carlos; Facciuto,Gabriela; Mata,Diego; Soto,Silvina M.
The genus Scoparia is native from Argentina. The diversity of colours and shape of their flowers bestows this genus a very interesting ornamental potential. The purpose of the present study is to explore the Scoparia species germplasm by means of in vitro polyploidization in order to improve their ornamental qualities. Accessions of S. montevidiensis var. montevidiensis, S. montevidiensis var. glandulifera, S. nudicaulis, S. hasleriana and S. dulcis were collected and maintained under greenhouse conditions. The Murashige-Skoog medium, supplemented with 0.25 mg/L BAP was used for the nodal segments multiplication of the five Scoparia species. Except for S. hasleriana, the multiplication rate of the other species ranged between 10 and 12 shoots per explant....
Tipo: Journal article Palavras-chave: Chimera; Flow cytometry; Micropropagation; Ornamental plants; Tetraploid.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000200010
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DYNAMICS OF SOMATIC CELLLINEAGE COMPETITION IN CHIMERAS OF Hydractinia symbiolongicarpus (CNIDARIA: HYDROZOA) Acta biol.Colomb.
SCHWARZ,RYAN S; CADAVID,LUIS F.
Sessile colonial invertebrates often fuse with conspecifics to form chimeras. Chimerism represents an unequivocal instance of withinindividual selection where genetically different celllineages compete for representation in the somatic and gametic pools. We analyzed temporal and spatial variations in somatic celllineage composition of laboratoryestablished chimeras of the hydroid Hydractinia symbiolongicarpus (Cnidaria: Hydrozoa). Using three clones with different allotypic specificities (i.e., two rejecting one another but fusing with a third one), we established two classes of twoway chimeras, a single threeway chimera class, and an incompatible interaction as control. Chimeras were sampled at five time intervals for a year. Celllineages in samples were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allorecognition; Hydractinia; Unitsofselection; Celllineage competition; Chimera.
Ano: 2007 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2007000300002
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