Involvement of ethylene in the latex metabolism and tapping panel dryness of Hevea brasilensis

Putranto Riza Arief, Herlinawati Eva, Rio Maryannick, Leclercq Julie, Piyatrakul Piyanuch, Gohet Eric, Sanier Christine, Oktavia Fetrina, Pirrello Julien, Kuswanhadi, Montoro Pascal. 2015. Involvement of ethylene in the latex metabolism and tapping panel dryness of Hevea brasilensis. International Journal of Molecular Sciences, 16 (8) : 17885-17908.

Url - éditeur : http://www.mdpi.com/1422-0067/16/8/17885/pdf

Quartile : Q2, Sujet : CHEMISTRY, MULTIDISCIPLINARY / Quartile : Q2, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY

Résumé : Ethephon, an ethylene releaser, is used to stimulate latex production in Hevea brasiliensis. Ethylene induces many functions in latex cells including the production of reactive oxygen species (ROS). The accumulation of ROS is responsible for the coagulation of rubber particles in latex cells, resulting in the partial or complete stoppage of latex flow. This study set out to assess biochemical and histological changes as well as changes in gene expression in latex and phloem tissues from trees grown under various harvesting systems. The Tapping Panel Dryness (TPD) susceptibility of Hevea clones was found to be related to some biochemical parameters, such as low sucrose and high inorganic phosphorus contents. A high tapping frequency and ethephon stimulation induced early TPD occurrence in a high latex metabolism clone and late occurrence in a low latex metabolism clone. TPD-affected trees had smaller number of laticifer vessels compared to healthy trees, suggesting a modification of cambial activity. The differential transcript abundance was observed for twenty-seven candidate genes related to TPD occurrence in latex and phloem tissues for ROS-scavenging, ethylene biosynthesis and signalling genes. The predicted function for some Ethylene Response Factor genes suggested that these candidate genes should play an important role in regulating susceptibility to TPD.

Mots-clés Agrovoc : Hevea brasiliensis, physiologie végétale, stress abiotique, stress oxydatif, éthéphon, éthylène, réponse de la plante, expression des gènes, facteur de transcription, antioxydant, caoutchouc, latex, phloème, stress dû à la sécheresse

Mots-clés géographiques Agrovoc : Indonésie

Classification Agris : F01 - Culture des plantes
F60 - Physiologie et biochimie végétale
F30 - Génétique et amélioration des plantes

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Putranto Riza Arief, CIRAD-BIOS-UMR AGAP (FRA)
• Herlinawati Eva, IRRI [Indonesian Rubber Research Institute] (IDN)
• Rio Maryannick, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-4573-1371
• Leclercq Julie, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-8110-3762
• Piyatrakul Piyanuch, RRIT (THA)
• Gohet Eric, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA) ORCID: 0000-0002-0379-0592
• Sanier Christine, CIRAD-BIOS-UMR AGAP (FRA)
• Oktavia Fetrina, IRRI [International Rice Research Institute] (THA)
• Pirrello Julien, CIRAD-BIOS-UMR AGAP (FRA)
• Kuswanhadi, IRRI [Indonesian Rubber Research Institute] (IDN)
• Montoro Pascal, CIRAD-BIOS-UMR AGAP (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/576991/)

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