Co-Authors:
Valmalette, J.C., IM2NP UMR 7334 CNRS, Université du Sud Toulon Var, P.O. Box 20132, 83957 La Garde cedex, France
Dombrovsky, A., Volcani Center, Institute of Plant Protection, P.O. Box 6, 50250 Bet Dagan, Israel, UMR7254 INRA/CNRS/UNS, Institut SophiaAgrobiotech, 400 route des Chappes, 06903 Sophia Antipolis, France
Brat, P., CIRAD UMR QualiSud, 73 rue J.F. Breton, 34398 Montpellier CEDEX 5, France
Mertz, C., CIRAD UMR QualiSud, 73 rue J.F. Breton, 34398 Montpellier CEDEX 5, France
Capovilla, M., UMR7254 INRA/CNRS/UNS, Institut SophiaAgrobiotech, 400 route des Chappes, 06903 Sophia Antipolis, France
Robichon, A., UMR7254 INRA/CNRS/UNS, Institut SophiaAgrobiotech, 400 route des Chappes, 06903 Sophia Antipolis, France
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.
תפריט נגישות
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מונוכרום
הדגשת קישורים
חסימת אנימציה
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