the structure of the t-dna in ri-transformedplants of brassica napus, nicotiana plumbaginifolia and nicotianatabacum was analysed. all the plants studied presenta particular phenotype with wrinkled leaves. the t-dnais composed of two parts: tl and tr. the size of thetl-dna (19-20 kb) seems to be almost constant, exceptin n. tabacum where it is shorter. the tr-dna can beabsent, and its size varies from about 5-28 kb, with twopredominant lengths. the smaller size does not include theregion homologous to the tms genes of the pti t-dna.the copy number varies from one to four copies per plantgenome. tl and tr-dna are not always present in thesame copy number, but in some cases are linked togethe
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.