Plants have a remarkable ability to generate organs with a different identity to the parent organ, called 'trans-organogenesis'. An example of trans-organogenesis is the formation of roots from stems (a type of adventitious root), which is the first type of root that arose during plant evolution. Despite being ancestral, stem-borne roots are often contextualised through lateral root research, implying that lateral roots precede adventitious roots. In this review we challenge that idea, highlight what is known about stem-borne root development across the plant kingdom, the remarkable diversity in form and function, and the many remaining evolutionary questions. Exploring stem-borne root evolutionary development can enhance our understanding of developmental decision making and the processes by which cells acquire their fates.
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Stem-borne roots as a framework to study trans-organogenesis and uncover fundamental insights in developmental biology.
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October 2024
Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19713, USA. Electronic address:
Plants have a remarkable ability to generate organs with a different identity to the parent organ, called 'trans-organogenesis'. An example of trans-organogenesis is the formation of roots from stems (a type of adventitious root), which is the first type of root that arose during plant evolution. Despite being ancestral, stem-borne roots are often contextualised through lateral root research, implying that lateral roots precede adventitious roots.
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