Leaf Eh and pH: A Novel Indicator of Plant Stress. Spatial, Temporal and Genotypic Variability in Rice (Oryza sativa L.)
2018
Husson, Olivier | Audebert, Alain | Benada, Jaroslav | Soglonou, Brigitte | Tano, Firmin | Dieng, Ibnou | Bousset, Lydia | Sarthou, Jean-Pierre | Joseph, Stephen | Menozzi, Philippe | Boulakia, Stephane | Futakuchi, Koichi | Africa Rice Center [Côte d'Ivoire] (AfricaRice) ; Consultative Group on International Agricultural Research [CGIAR] (CGIAR) | Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | Centre Etude Regional pour l'Amelioration de l'Adaptation à la Sécheresse ; Institut sénégalais de recherches agricoles [Dakar] (ISRA) | Institut de Génétique, Environnement et Protection des Plantes (IGEPP) ; Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST | AGroécologie, Innovations, teRritoires (AGIR) ; Institut National de la Recherche Agronomique (INRA)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT) | School of Materials Science and Engineering ; University of New South Wales [Sydney] (UNSW) | Institute of Resource, Ecosystem and Environment of Agriculture ; Nanjing Agricultural University (NAU) | University of Newcastle (UoN) | CIRAD (UPR AIDA) ; CIRAD (CRESI action) ; Africa Rice Center
International audience
Mostrar más [+] Menos [-]Inglés. A wealth of knowledge has been published in the last decade on redox regulations in plants. However, these works remained largely at cellular and organelle levels. Simple indicators of oxidative stress at the plant level are still missing. We developed a method for direct measurement of leaf Eh and pH, which revealed spatial, temporal, and genotypic variations in rice. Eh (redox potential) and Eh@pH7 (redox potential corrected to pH 7) of the last fully expanded leaf decreased after sunrise. Leaf Eh was high in the youngest leaf and in the oldest leaves, and minimum for the last fully expanded leaf. Leaf pH decreased from youngest to oldest leaves. The same gradients in Eh-pH were measured for various varieties, hydric conditions, and cropping seasons. Rice varieties differed in Eh, pH, and/or Eh@pH7. Leaf Eh increases and leaf pH decreases with plant age. These patterns and dynamics in leaf Eh-pH are in accordance with the pattern and dynamics of disease infections. Leaf Eh-pH can bring new insight on redox processes at plant level and is proposed as a novel indicator of plant stress/health. It could be used by agronomists, breeders, and pathologists to accelerate the development of crop cultivation methods leading to agroecological crop protection.
Mostrar más [+] Menos [-]Palabras clave de AGROVOC
Información bibliográfica
Este registro bibliográfico ha sido proporcionado por Institut national de la recherche agronomique