Improvement of grapevine physiology and yield under summer stress by kaolin-foliar application: water relations, photosynthesis and oxidative damage

Knowledge about short-term climate change adaptation strategies for Mediterranean vineyards is needed in order to improve grapevine physiology and yield-quality attributes. We investigated effects of kaolin-particle film suspension on water relations, photosynthesis and oxidative stress of field-gro...

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Bibliographic Details
Published in:Photosynthetica 2018-06, Vol.56 (2), p.641-651
Main Authors: Dinis, L.-T., Malheiro, A. C., Luzio, A., Fraga, H., Ferreira, H., Gonçalves, I., Pinto, G., Correia, C. M., Moutinho-Pereira, J.
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Chlorophyll
Climate change
Conductance
Fluorescence
Foliar applications
Grapevines
Kaolin
Leaves
Life Sciences
Original Paper
Oxidative stress
Phenols
Photochemicals
Photosynthesis
Photosynthetic pigments
Photosystem II
Physiology
Pigments
Plant Physiology
Proteins
Quality management
Quantum efficiency
Reflectance
Resistance
Starch
Stomata
Stomatal conductance
Sugar
Summer
Thiobarbituric acid
Vineyards
Water potential
Water relations
Yield
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Summary:Knowledge about short-term climate change adaptation strategies for Mediterranean vineyards is needed in order to improve grapevine physiology and yield-quality attributes. We investigated effects of kaolin-particle film suspension on water relations, photosynthesis and oxidative stress of field-grown grapevines in the Douro region (northern Portugal) in 2012 and 2013. Kaolin suspension decreased leaf temperature by 18% and increased leaf water potential (up to 40.7% in 2013). Maximum photochemical quantum efficiency of PSII was higher and the minimal chlorophyll fluorescence was lower in the plants sprayed by kaolin. Two months after application, net photosynthesis and stomatal conductance at midday increased by 58.7 and 28.4%, respectively, in treated plants. In the same period, kaolin treatment increased photochemical reflectance, photosynthetic pigments, soluble proteins, soluble sugars, and starch concentrations, while decreased total phenols and thiobarbituric acid-reactive substances. Kaolin application can be an operational tool to alleviate summer stresses, which ameliorates grapevine physiology and consequently leads to a higher yield.
ISSN:0300-3604
1573-9058
DOI:10.1007/s11099-017-0714-3