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- aggregation classification "A1".
- aggregation creator person.
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- aggregation date "2009".
- aggregation format "application/pdf".
- aggregation hasFormat 771179.bibtex.
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- aggregation isPartOf urn:issn:0960-7412.
- aggregation language "eng".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Biology and Life Sciences".
- aggregation title "The T-DNA integration pattern in Arabidopsis transformants is highly determined by the transformed target cell".
- aggregation abstract "Transgenic loci obtained after Agrobacterium tumefaciens-mediated transformation can be simple, but fairly often they contain multiple T-DNA copies integrated into the plant genome. To understand the origin of complex T-DNA loci, floral-dip and root transformation experiments were carried out in Arabidopsis thaliana with mixtures of A. tumefaciens strains, each harboring one or two different T-DNA vectors. Upon floral-dip transformation, 6-30% of the transformants were co-transformed by multiple T-DNAs originating from different bacteria and 20-36% by different T-DNAs from one strain. However, these co-transformation frequencies were too low to explain the presence of on average 4-6 T-DNA copies in these transformants, suggesting that, upon floral-dip transformation, T-DNA replication frequently occurs before or during integration after the transfer of single T-DNA copies. Upon root transformation, the co-transformation frequencies of T-DNAs originating from different bacteria were similar or slightly higher (between 10 and 60%) than those obtained after floral-dip transformation, whereas the co-transformation frequencies of different T-DNAs from one strain were comparable (24-31%). Root transformants generally harbor only one to three T-DNA copies, and thus co-transformation of different T-DNAs can explain the T-DNA copy number in many transformants, but T-DNA replication is postulated to occur in most multicopy root transformants. In conclusion, the comparable co-transformation frequencies and differences in complexity of the T-DNA loci after floral-dip and root transformations indicate that the T-DNA copy number is highly determined by the transformation-competent target cells.".
- aggregation authorList BK797683.
- aggregation endPage "145".
- aggregation issue "1".
- aggregation startPage "134".
- aggregation volume "60".
- aggregation aggregates 779028.
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- aggregation similarTo j.1365-313X.2009.03942.x.
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