|
|
|
Registros recuperados: 280 | |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
Castrillo,M.L; Fonseca,M.I; Bich,G.A; Jerke,G; Horianski,M.A; Zapata,P.D. |
Members of Aspergillus section Nigri are distributed worldwide and are potentially ochratoxin A producers; some of them are used at industrial level as source of extracellular enzymes and organic acids. The taxonomy of this section comprises one of the most complex and confusing of genus Aspergillus. The objectives of present work were to study the phylogeny of Aspergillus section Nigri and their taxonomy by amplifying ITS1, 5.8S and ITS2 regions. We analyzed 14 strains of Aspergillus section Nigri isolated from different commercial forms of yerba mate, classified according to morphology. Genomic DNA was extracted, the ITS regions were amplified with universal primers ITS1 and ITS4, and the obtained fragments were sequenced. The obtained sequences were... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus section Nigri; Taxonomy; Ribosomal DNA. |
Ano: 2012 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332012000300003 |
| |
|
| |
|
| |
|
| |
|
|
Souza Canada,Eduardo Daniel; Fettig,Sebastian; Ziegler,Paul; Beck,Erwin. |
Klein Brujo was found to be a promising Argentine spring wheat genotype for transformation studies. In the present work we optimized the biolistic transformation of embryogenic scutellar calli from this genotype. We first identified scutellar callus induction media (SCIM) most promising for in vitro embryogenic plant regeneration with Klein Brujo. We then co-bombarded embryos of Klein Brujo and, for comparison, of Bobwhite, a highly transformable wheat line, on these media with 1 μm gold particles coated with two plasmids. One of these contained the marker gene gfp (linked to the CaMV35S-promoter) and the selection gene bar (resistance to phosphinothricin: PPT, linked to the maize Ubi1-promoter), whereas the other contained ipt (encoding... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Particle bombardment parameters; Co-transformation; Green fluorescent protein; Phosphinothricin resistance; Transgene segregation. |
Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332015000100003 |
| |
|
| |
|
| |
|
|
Masuelli,Ricardo W; Marfil,Carlos F. |
Uno de los mecanismos más importante en la evolución de las plantas es la hibridación interespecífica. Este mecanismo induce cambios en el genoma que abarcan tanto alteraciones genéticas como epigenéticas. Estudios recientes muestran que los cambios epigenéticos generan variantes alélicas llamadas "epialelos" que pueden tener consecuencias morfológicas, fisiológicas y ecológicas de importancia en la evolución de las plantas. Los epialelos constituyen una nueva fuente de variabilidad que se suma a la variabilidad genética. Desde un punto de vista evolutivo la variabilidad generada por mecanismos epigenéticos amplía la variabilidad genética ya que aparecen nuevos epialelos que pueden ser seleccionados en poblaciones naturales. Además, las variantes... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Epigenética; Evolución; Variabilidad. |
Ano: 2011 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332011000100001 |
| |
|
| |
Registros recuperados: 280 | |
|
|
|