Photosynthetica

pp 1–12

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

  • L.-T. Dinis
  • A. C. Malheiro
  • A. Luzio
  • H. Fraga
  • H. Ferreira
  • I. Gonçalves
  • G. Pinto
  • C. M. Correia
  • J. Moutinho-Pereira
Article
  • 59 Downloads

Abstract

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.

Additional key words

biochemistry Douro region oxidative stress Vitis vinifera 

Abbreviation

Chl

chlorophyll

Car

carotenoid

Ci/Ca

internal CO2 concentration/ambient CO2 ratio

E

transpiration rate

ETR

photosynthetic electron transport rate

F0

minimal chlorophyll fluorescence

Fv

variable chlorophyll fluorescence

Fm

maximal chlorophyll fluorescence

Fv/Fm

maximum photochemical quantum efficiency of PSII

Fv’/Fm

capture efficiency of excitation energy by open PSII reaction centres

gs

stomatal conductance

PN

net CO2 assimilation rate

qN

nonphotochemical quenching

qP

photochemical quenching

RIred edge

chlorophyll reflectance index

SP

soluble proteins

SS

soluble sugars

St

starch

TBARS

thiobarbituric acid-reactive substances

TP

total phenols

ΦPSII

actual PSII efficiency

Ψmd

midday leaf water potential

Ψpd

pte]redawn leaf water potential

WUEi

PN/gs, intrinsic water-use efficiency

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Supplementary material

11099_2017_714_MOESM1_ESM.pdf (217 kb)
Supplementary material, approximately 216 KB.
11099_2017_714_MOESM2_ESM.pdf (152 kb)
Supplementary material, approximately 151 KB.

Copyright information

© The Institute of Experimental Botany 2017

Authors and Affiliations

  • L.-T. Dinis
    • 1
  • A. C. Malheiro
    • 1
  • A. Luzio
    • 1
  • H. Fraga
    • 1
  • H. Ferreira
    • 1
  • I. Gonçalves
    • 2
  • G. Pinto
    • 3
  • C. M. Correia
    • 1
  • J. Moutinho-Pereira
    • 1
  1. 1.Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB)Universidade de Trás-os-Montes e Alto Douro, Apt. 1013Vila RealPortugal
  2. 2.Associação para o Desenvolvimento da Viticultura Duriense (ADVID)Edifício Centro de Excelência da Vinha e do Vinho, Parque de Ciência e Tecnologia de Vila Real–Régia Douro ParkVila RealPortugal
  3. 3.Department of Biology & CESAM – Centre for Environmental and Marine StudiesUniversidade de Aveiro, Campus Universitário de SantiagoAveiroPortugal

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