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Yeonggil Rim,Lijun Huang,Hyosub Chu,Xiao Han,조원경,Che Ok Jeon,Hye Jin Kim,홍종찬,윌리엄루카스,김재연 한국분자세포생물학회 2011 Molecules and cells Vol.32 No.6
In plants, cell-to-cell communication is pivotal for the orchestration of cell fate determination, organ develop-ment, and the integration of whole plant physiology. One of the strategies for intercellular communication uses symplasmic communication channels, called plasmodes-mata (PD). These PD establish unique cytoplasmic chan-nels for the intercellular exchange not only of metabolites and small signaling molecules, but also of regulatory proteins and RNAs to allow for local orchestration of development and physiology. A number of non-cell-autonomous transcrip-tion factors (NCATFs) have been shown to function in the coordination of specific regulatory networks. To further explore the potential of such NCATFs, a genome-wide screen was performed on the transcription factor (TF) families in Arabidopsis. We here report that, among the 76 TFs examined, 22 were shown to move beyond their sites of transcription in the root apex; these NCATFs belonged to 17 TF families, including homeobox, GRAS, and MYB. Expression studies performed on variously-sized mCherry constructs identified a range of PD size exclusion limits within tissues of the root. In addition, our studies showed that actual protein level was an important factor controlling the range of TF intercellular movement. Interestingly, our studies on CAPRICE move-ment revealed tissue-speci-ficity with respect to the mode of intercellular trafficking. These findings are discussed with respect to the regulation between cell-autonomous or non-cell-autonomous action.
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