Ontology type: schema:ScholarlyArticle
1990-05
AUTHORSCharlotte H. Hänisch ten Cate, Annelies E. H. M. Loonen, Marie Paule Ottaviani, Liesbeth Ennik, Gerben van Eldik, Willem J. Stiekema
ABSTRACTThe presence of T-DNA was examined by Southern blot analysis in 16 regenerated shoot lines derived from 6 Agrobacterium rhizogenes-transformed root clones of Solanum tuberosum L. cv. Bintje.TR-DNA, present in regenerated shoot lines from 3 out of 6 root clones was correlated with the presence of opines. One root clone produced opines up to 2.5 years of subculture. However, plant regeneration from and prolonged subculturing of this root clone resulted in loss of opine synthesis, caused by deletion of TR-DNA.TL-DNA inserted at 1 to 5 independent loci was found in 14 of the 16 shoot lines. Surprisingly, 1 to 2 additional insertions next to similar insertions of TL-DNA were found in shoot lines from the same root clone (named ‘sister’ shoot lines) in 2 out of 4 root clones. Nevertheless, this did not result in gross phenotypic variation between sister shoot lines. Another root clone regenerated 1 shoot line with an Ri phenotype, containing 1 insertion of TL-DNA, and 2 shoot lines with a normal Bintje phenotype without TL-DNA. The 5th root clone showed no difference between sister shoot lines and the 6th root clone produced only 1 shoot line.We conclude that during prolonged root culture and during shoot regeneration from root clones deletion of TL- and TR-DNA insertions can occur. The significance of the frequency of deletion of T-DNA of the Ri plasmid is discussed. More... »
PAGES735-741
http://scigraph.springernature.com/pub.10.1007/bf00016506
DOIhttp://dx.doi.org/10.1007/bf00016506
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PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/1966386
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