Rewiring vascular patterning through translational control in Arabidopsis
Ko, D.; Ruonala, R.; Liu, H.; Novak, O.; Ljung, K.; De Diego, N.; Malinowski, R.; Helariutta, Y.
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Plant vascular systems exhibit a wide developmental spectrum, from rigid woody tissues to soft, fleshy storage tissues. We show that increasing polyamine thermospermine transport into wild-type rootstocks, together with cytokinin, reprograms xylem identity from woody to fleshy in Arabidopsis. Our findings establish thermospermine as a mobile developmental signal and suggest a strategy for engineering plant vascular architecture.
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