Organ regeneration does not require a functional stem cell niche in plants

Giovanni Sena, Xiaoning Wang, Hsiao-Yun Liu, Hugo Hofhuis and Kenneth D. Birnbaum ()
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Giovanni Sena: New York University, Center for Genomics and Systems Biology, Silver Building, 100 Washington Square East, New York, New York 10003, USA
Xiaoning Wang: New York University, Center for Genomics and Systems Biology, Silver Building, 100 Washington Square East, New York, New York 10003, USA
Hsiao-Yun Liu: New York University, Center for Genomics and Systems Biology, Silver Building, 100 Washington Square East, New York, New York 10003, USA
Hugo Hofhuis: Utrecht University, Faculty of Science, Padualaan 8, 3584 CH, Utrecht, The Netherlands
Kenneth D. Birnbaum: New York University, Center for Genomics and Systems Biology, Silver Building, 100 Washington Square East, New York, New York 10003, USA

Nature, 2009, vol. 457, issue 7233, 1150-1153

Abstract: Root-tip reorganization Stem cells are widely seen as the mechanism that permits organ regeneration in both plants and animals. In the plant root system, the stem cell niche has been assumed to be a local pattern organizer, required for both continuous post-embryonic growth and regeneration. New work in a root-tip regeneration system now shows that the root stem cell niche is in fact not necessary for pattern formation and re-establishment of cell identity, thus separating the functions of growth and repatterning. When the Arabidopsis root tip is cut off, taking with it the stem cell niche, the plant's remaining cells are able to regenerate all the major tissues that make up the root tip. This finding suggests that there are as yet unknown mechanisms that coordinate organogenesis independently of a central organizer.

Date: 2009
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DOI: 10.1038/nature07597

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