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Plant Physiology 67:535-538 (1981)
© 1981 American Society of Plant Biologists

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Transfer Ribonucleic Acid Modification and Its Relationship to Tumorous and Nontumorous Plant Growth

Larry H. Jones1 and Tom K. Scott

Department of Botany, University of North Carolina, Chapel Hill, North Carolina 27514

Detailed analyses of tRNA hydrolysates from four tissue types of Nicotiana tabacum, pith from intact plants, pith growing in culture, habituated tissue in culture, and crown gall tumor tissue in culture, revealed significant qualitative and quantitative differences in the pattern of methylation. Although pith from intact plants and pith growing in culture possessed seven different methylated nucleosides, only two were found in habituated and tumorous tissues in culture. Four of the five compounds accounting for the difference were tentatively identified as methylated guanosines. Evaluation of results in terms of several parameters, including growth rate, the tumorous state, habituation, tissue culture, and potential for differentiation, indicate that the extent of tRNA methylation may be correlated with the potential for differentiation of a particular tissue.

1 Present address: Department of Biology, The University of the South, Sewanee, TN 37375.






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Copyright © 1981 by the American Society of Plant Biologists