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Phenotypic differences determine drought stress responses in ecotypes of Arundo donax adapted to different environments.
Ahrar, Mastaneh; Doneva, Dilyana; Tattini, Massimiliano; Brunetti, Cecilia; Gori, Antonella; Rodeghiero, Mirco; Wohlfahrt, Georg; Biasioli, Franco; Varotto, Claudio; Loreto, Francesco; Velikova, Violeta.
Afiliación
  • Ahrar M; Department of Biodiversity and Molecular Ecology, Research and Innovation Centre, Fondazione Edmund Mach, S. Michele all'Adige, Trento, Italy.
  • Doneva D; Institute of Ecology, University of Innsbruck, Innsbruck, Austria.
  • Tattini M; Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Sofia, Bulgaria.
  • Brunetti C; The National Research Council of Italy (CNR), Institute for Sustainable Plant Protection, Sesto Fiorentino, Florence, Italy.
  • Gori A; The National Research Council of Italy (CNR), Trees and Timber Institute, Sesto Fiorentino, Florence, Italy.
  • Rodeghiero M; Department of Plant, Soil and Environmental Sciences, University of Florence, Florence, Italy.
  • Wohlfahrt G; Department of Agri-Food Production and Environmental Sciences, University of Florence, Florence, Italy.
  • Biasioli F; Department of Sustainable Agro-Ecosystems and Bioresources, Research and Innovation Centre, Fondazione Edmund Mach, S. Michele all'Adige, Trento, Italy.
  • Varotto C; Institute of Ecology, University of Innsbruck, Innsbruck, Austria.
  • Loreto F; Department of Food Quality and Nutrition, Volatile Compound Facility, Research and Innovation Centre, Fondazione Edmund Mach, S. Michele all'Adige, Trento, Italy.
  • Velikova V; Department of Biodiversity and Molecular Ecology, Research and Innovation Centre, Fondazione Edmund Mach, S. Michele all'Adige, Trento, Italy.
J Exp Bot ; 68(9): 2439-2451, 2017 04 01.
Article en En | MEDLINE | ID: mdl-28449129
Arundo donax has been identified as an important biomass and biofuel crop. Yet, there has been little research on photosynthetic and metabolic traits, which sustain the high productivity of A. donax under drought conditions. This study determined phenotypic differences between two A. donax ecotypes coming from stands with contrasting adaptation to dry climate. We hypothesized that the Bulgarian (BG) ecotype, adapted to drier conditions, exhibits greater drought tolerance than the Italian (IT) ecotype, adapted to a more mesic environment. Under well-watered conditions the BG ecotype was characterized by higher photosynthesis, mesophyll conductance, intrinsic water use efficiency, PSII efficiency, isoprene emission rate and carotenoids, whereas the IT ecotype showed higher levels of hydroxycinnamates. Photosynthesis of water-stressed plants was mainly limited by diffusional resistance to CO2 in BG, and by biochemistry in IT. Recovery of photosynthesis was more rapid and complete in BG than in IT, which may indicate better stability of the photosynthetic apparatus associated to enhanced induction of volatile and non-volatile isoprenoids and phenylpropanoid biosynthesis. This study shows that a large phenotypic plasticity among A. donax ecotypes exists, and may be exploited to compensate for the low genetic variability of this species when selecting plant productivity in constrained environments.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fotosíntesis / Adaptación Biológica / Sequías / Ecotipo / Poaceae País/Región como asunto: Europa Idioma: En Revista: J Exp Bot Asunto de la revista: BOTANICA Año: 2017 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fotosíntesis / Adaptación Biológica / Sequías / Ecotipo / Poaceae País/Región como asunto: Europa Idioma: En Revista: J Exp Bot Asunto de la revista: BOTANICA Año: 2017 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Reino Unido