Pluripotent versus totipotent plant stem cells: dependence versus autonomy ?

Verdeil Jean-Luc, Alemanno Laurence, Niemenak Nicolas, Tranbarger Timothy John. 2007. Pluripotent versus totipotent plant stem cells: dependence versus autonomy ?. Trends in Plant Science, 12 (6) : 245-252.

Résumé : Little is known of the mechanisms that induce the dedifferentiation of a single somatic cell into a totipotent embryogenic cell that can either be regenerated or develop into an embryo and subsequently an entire plant. In this Opinion article, we examine the cellular, physiological and molecular similarities and differences between different plant stem cell types. We propose to extend the plant stem cell concept to include single embryogenic cells as a totipotent stem cell based on their capacity to regenerate or develop into an embryo under certain conditions. Our survey suggests that differences in chromatin structure might ensure that meristem-localized stem cells have supervised freedom and are pluripotent, and that embryogenic stem cells are unsupervised, autonomous and, hence, freely totipotent.

Mots-clés Agrovoc : cellule, développement biologique, tige, totipotence, physiologie végétale, embryon somatique, cytologie, biologie moléculaire

Classification Agris : F62 - Physiologie végétale - Croissance et développement
F30 - Génétique et amélioration des plantes

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Verdeil Jean-Luc, CIRAD-BIOS-UMR DAP (FRA)
• Alemanno Laurence, CIRAD-CP-UMR BEPC (FRA)
• Niemenak Nicolas, Université de Yaoundé (CMR)
• Tranbarger Timothy John, IRD (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/539560/)

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