Innovation, Conservation and Repurposing in Root Cell Type Development

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• Prof Siobhan Brady, UC Davis
• Thursday 19 November 2020, 13:00-14:00
• Online.

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Plant species have evolved myriads of solutions, including complex cell type development and regulation, to adapt to dynamic environments. To understand this cellular diversity, we profiled tomato root cell type translatomes. Using xylem differentiation in tomato, examples of functional innovation, repurposing and conservation of transcription factors are described, relative to the model plant Arabidopsis. Repurposing and innovation of genes are further observed within an exodermis regulatory network and illustrate its function. Comparative translatome analyses of rice, tomato and Arabidopsis tissues suggest increased expression conservation of root meristems compared with other homologous tissues. In addition, the functions of constitutively expressed genes are more conserved than those of cell type/tissue-enriched genes. These observations suggest that higher-order properties of cell type and pan-cell type regulation are evolutionarily conserved between plants and animals.

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