Juvenile Hevea transgenic plants over-expressing transcription factor HbERF-IXc5 develop more latex cells than wild-type material

Lestari Retno, Rio Maryannick, Martin Florence, Leclercq Julie, Dessailly Florence, Sanier Christine, Melliti Semi, Suharsono Sony, Montoro Pascal. 2016. Juvenile Hevea transgenic plants over-expressing transcription factor HbERF-IXc5 develop more latex cells than wild-type material. In : CRRI and IRRDB International Rubber Conference 2016, Siem Reap, Cambodia. CRRI, IRRDB. Siem Reap : CRRI-IRRDB, 327-331. International Rubber Conference, Siem Reap, Cambodge, 21 Novembre 2016/25 Novembre 2016.

Résumé : Mechanical wounding through tapping has long been known to induce laticifer differentiation in Hevea brasiliensis. Recent studies reveal that dehydration, hydrogen peroxide, and jasmonates can similarly play a role in wound-induced laticifer differentiation. The Hevea ethylene response factor gene, HbERF-IXc5, is thought to be an ortholog to ERF1 of Arabidopsis. ERF1 has been suggested as a component of defence responses through the involvement of the ethylene and jasmonic acid signalling pathways. In this study, Agrobacterium tumefaciens-mediated genetic transformation was carried out with this candidate gene. A histological analysis of HbERF-IXc5 lines revealed several changes in anatomy, particularly in terms of the number of laticifer cells. The results suggest that HbERF-IXc5 is a transcription factor driving the expression of some target genes involved in jasmonate-induced laticifer differentiation.

Mots-clés libres : Ethylene, Ethylene response factor, Jasmonate, Latex, Laticifer, Rubber

Classification Agris : F30 - Génétique et amélioration des plantes
F60 - Physiologie et biochimie végétale

Auteurs et affiliations

• Lestari Retno, University of Indonesia (IDN)
• Rio Maryannick, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-4573-1371
• Martin Florence, CIRAD-BIOS-UMR AGAP (FRA)
• Leclercq Julie, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-8110-3762
• Dessailly Florence, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-7873-3974
• Sanier Christine, CIRAD-BIOS-UMR AGAP (FRA)
• Melliti Semi, CIRAD-BIOS-UMR AGAP (FRA)
• Suharsono Sony, Bogor Agricultural University (IDN)
• Montoro Pascal, CIRAD-BIOS-UMR AGAP (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/582428/)

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