Agritrop
Home

Light- induced electron transfer and ATP synthesis in a carotene synthesizing insect

Valmalette Jean Christophe, Dombrovsky Aviv, Brat Pierre, Mertz Christian, Capovilla Maria, Robichon Alain. 2012. Light- induced electron transfer and ATP synthesis in a carotene synthesizing insect. Scientific Reports, 2 (579), 8 p.

Journal article ; Article de revue à facteur d'impact Revue en libre accès total
[img]
Preview
Published version - Anglais
Use under authorization by the author or CIRAD.
document_566006.pdf

Télécharger (2MB) | Preview

Quartile : Q1, Sujet : MULTIDISCIPLINARY SCIENCES

Abstract : A singular adaptive phenotype of a parthenogenetic insect species (Acyrthosiphon pisum) was selected in cold conditions and is characterized by a remarkable apparition of a greenish colour. The aphid pigments involve carotenoid genes well defined in chloroplasts and cyanobacteria and amazingly present in the aphid genome, likely by lateral transfer during evolution. The abundant carotenoid synthesis in aphids suggests strongly that a major and unknown physiological role is related to these compounds beyond their canonical anti-oxidant properties. We report here that the capture of light energy in living aphids results in the photo induced electron transfer from excited chromophores to acceptor molecules. The redox potentials of molecules involved in this process would be compatible with the reduction of the NAD+ coenzyme. This appears as an archaic photosynthetic system consisting of photo-emitted electrons that are in fine funnelled into the mitochondrial reducing power in order to synthesize ATP molecules. (Résumé d'auteur)

Mots-clés Agrovoc : Acyrthosiphon pisum, Caroténoïde, Couleur, Biosynthèse, ATP, Physiologie animale, Mitochondrie, génétique animale, Lumière, Rayonnement ultraviolet, Photosynthèse

Classification Agris : L50 - Animal physiology and biochemistry

Champ stratégique Cirad : Hors axes (2005-2013)

Auteurs et affiliations

  • Valmalette Jean Christophe, Université du Sud Toulon-Var (FRA)
  • Dombrovsky Aviv, Volcani Center (ISR)
  • Brat Pierre, CIRAD-PERSYST-UMR Qualisud (FRA) ORCID: 0000-0003-0429-9575
  • Mertz Christian, CIRAD-PERSYST-UMR Qualisud (FRA)
  • Capovilla Maria, Institut Sophia Agrobiotech (FRA)
  • Robichon Alain, Institut Sophia Agrobiotech (FRA)

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/566006/)

View Item (staff only) View Item (staff only)

[ Page générée et mise en cache le 2021-03-05 ]