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Is vegetative area, photosynthesis, or grape C uploading involved in the climate change-related grape sugar/anthocyanin decoupling in Tempranillo?
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname
- Publication Year :
- 2018
-
Abstract
- 14 Pags.- 1 Tabl.- 6 Figs.<br />Foreseen climate change is expected to impact on grape composition, both sugar and pigment content. We tested the hypothesis that interactions between main factors associated with climate change (elevated CO2, elevated temperature, and water deficit) decouple sugars and anthocyanins, and explored the possible involvement of vegetative area, photosynthesis, and grape C uploading on the decoupling. Tempranillo grapevine fruit-bearing cuttings were exposed to CO2 (700 vs. 400 ppm), temperature (ambient vs. + 4 °C), and irrigation levels (partial vs. full) in temperature-gradient greenhouses. In a search for mechanistic insights into the underlying processes, experiments 1 and 2 were designed to maximize photosynthesis and enlarge leaf area range among treatments, whereas plant growth was manipulated in order to deliberately down-regulate photosynthesis and control vegetative area in experiments 3 and 4. Towards this aim, treatments were applied either from fruit set to maturity with free vegetation and fully irrigated or at 5–8% of pot capacity (experiments 1 and 2), or from veraison to maturity with controlled vegetation and fully irrigated or at 40% of pot capacity (experiments 3 and 4). Modification of air 13C isotopic composition under elevated CO2 enabled the further characterization of whole C fixation period and C partitioning to grapes. Increases of the grape sugars-to-anthocyanins ratio were highly and positively correlated with photosynthesis and grape 13C labeling, but not with vegetative area. Evidence is presented for photosynthesis, from fruit set to veraison, and grape C uploading, from veraison to maturity, as key processes involved in the establishment and development, respectively, of the grape sugars to anthocyanins decoupling.<br />Science and Innovation (BFU2008-01405/BFI), Economy and Competitiveness (AGL2014-56075-C2-1-R) Spanish Ministries, Aragón Government (A03 group) and the Basque Government (IT-932-16) for financial support, Navarra University “Asociación de Amigos” for Carolina Salazar-Parra grant
- Subjects :
- 0106 biological sciences
Irrigation
Climate Change
Plant Science
Biology
Photosynthesis
01 natural sciences
Biochemistry
040501 horticulture
Veraison
Leaf area
Anthocyanins
Cutting
chemistry.chemical_compound
Climate change
Vitis
Sugar
Carbon Isotopes
Plant physiology
04 agricultural and veterinary sciences
Cell Biology
General Medicine
Carbon Dioxide
Carbon
Plant Leaves
Horticulture
chemistry
Sugars/anthocyanins decoupling
Anthocyanin
Composition (visual arts)
Grapevine
Harvest date
0405 other agricultural sciences
Sugars
010606 plant biology & botany
Subjects
Details
- ISSN :
- 15735079
- Volume :
- 138
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Photosynthesis research
- Accession number :
- edsair.doi.dedup.....df96475a7db9a5a892cc94d3e56a5d91