Callogenesis and rhizogenesis in date palm leaf segments: are there similarities between the two auxin-induced pathways?

Gueye B., Saïd-Ahmed Hami, Morcillo Fabienne, Borgel Alain, Sané Djibril, Hilbert Jean-Louis, Verdeil Jean-Luc, Blervacq Anne Sophie. 2009. Callogenesis and rhizogenesis in date palm leaf segments: are there similarities between the two auxin-induced pathways?. Plant Cell, Tissue and Organ Culture, 98 (1) : 47-58.

Quartile : Q2, Sujet : PLANT SCIENCES / Quartile : Q3, Sujet : BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Résumé : In date palm (Phoenix dactylifera L. cv. Ahmar, Arecaceae), as for many monocotyledons, callogenesis is a prerequisite for the initiation of somatic embryogenesis, and requires the presence of auxin in the medium. Immature leaf explants were cultivated in medium supplemented with either 1 or 54 lM 1-naphtaleneacetic acid in order to induce either rhizogenesis or callogenesis. Histological studies performed throughout the culture period established that precocious cell reactivation is similar in both morphogenetic pathways. Early cytological modifications are associated with cell reactivation and are observed in the pluripotent cells of perivascular sheaths. Divergence between the callogenesis and rhizogenesis pathways is observed later, during the subsequent determination and morphological differentiation phases. We established that in date palm, the rhizogenesis and callogenesis pathways are initiated from the same cell type, the ultimate developmental fate depending upon auxin concentration.

Mots-clés Agrovoc : Phoenix dactylifera

Mots-clés géographiques Agrovoc : Sénégal, Mauritanie

Classification Agris : F02 - Multiplication végétative des plantes
F60 - Physiologie et biochimie végétale

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

Auteurs et affiliations

• Gueye B., UCAD (SEN)
• Saïd-Ahmed Hami, CERD (DJI)
• Morcillo Fabienne, CIRAD-BIOS-UMR DIAPC (FRA)
• Borgel Alain, IRD (FRA)
• Sané Djibril, UCAD (SEN)
• Hilbert Jean-Louis, USTL [Université des sciences et technologies de Lille] (FRA)
• Verdeil Jean-Luc, CIRAD-BIOS-UMR DAP (FRA)
• Blervacq Anne Sophie, USTL [Université des sciences et technologies de Lille] (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/549620/)

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