Reprogramming of the activity of the activator/dissociation transposon family during plant regeneration in rice |
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Authors: | Ki Chul Min Je Byoung Il Piao Hai Long Par Soon Ju Kim Min Jung Park Sung Han Park Jin Young Park Su Hyun Lee Eun Kyeong Chon Nam Soo Won Yong Jae Lee Gi Hwan Nam Min Hee Yun Doh Won Lee Myung Chul Cha Young Soon Le Kon Ho Eun Moo Young Han Chang-Deok |
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Institution: | Division of Applied Life Science, Gyeongsang National University, Jinju, Korea. |
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Abstract: | Many aspects of epigenetic phenomena have been elucidated via studies of transposable elements. An active transposable element frequently loses its ability to mobilize and goes into an inactive state during development. In this study, we describe the cyclic activity of a maize transposable element dissociation (Ds) in rice. In rice genome, Ds undergoes the spontaneous loss of mobility. However, an inactive state of Ds can be changed into an active state during tissue culture. The recovery of mobility accompanies not only changes in the methylation patterns of the terminal region of Ds, but also alteration in the steady state level of the activator (Ac) mRNA that is expressed by a constitutive CaMV 35S promoter. Furthermore, the Ds-reactivation process is not random, but stage-specific during plantlet regeneration. Our findings have expanded previous observations on Ac reactivation in the tissue culture of maize. |
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