RT info:eu-repo/semantics/article
T1 Relationships between water status, leaf chlorophyll content and photosynthetic performance in Tempranillo vineyards
A1 Hailemichael, Girma
A1 Catalina Tomás, Álvaro
A1 González García, María Rosa
A1 Martín Peña, Pedro
K1 Clorofila
K1 Chlorophyll
K1 Vid - Cultivo
K1 Uvas - Análisis
K1 Vinos y vinificación - Análisis
K1 Photosynthesis
K1 3309.29 Vino
K1 5102.01 Agricultura
AB The aims of this work were (i) to study the relationships between leaf water potential, foliar chlorophyllcontent and photosynthetic performance of grapevines under field conditions, and (ii) to evaluate thefeasibility of chlorophyll fluorescence parameters to assess water status in commercial vineyards. Duringthree consecutive seasons (2011 to 2013), 20 non-irrigated “Tempranillo” vineyard subzones were monitoredin Ribera del Duero, Spain. Data on foliar chlorophyll content, midday and predawn leaf water potential,net assimilation and chlorophyll fluorescence parameters were measured at fruit set, pre-véraison andvéraison. The results show that the water potential indicated weak to moderate stress in the study yearsand decreased along the vegetative cycle, while foliar chlorophyll contents showed an increasing trend. Thecorrelation between both variables was not consistent. Linear regression of the chlorophyll fluorescenceparameters in dark-adapted leaves, Fo, Fv and Fv/Fm, over chlorophyll content was strong in all thestudy years (higher determination coefficients for Fv/Fm at fruit set in 2012 and 2013). In general, thewater potential with low coefficients of variation showed a low effect on photosynthesis activity, althoughvalues in variables such as Fm, Fv, Fv/Fm, Fs/Fo and ΦPSII registered an increasing trend when middayleaf water potential decreased in the pre-véraison and véraison stages. These variables could be useful toestimate water status in commercial vineyards for application in precision viticulture.
PB South African Society for Enology and Viticulture
SN 0253-939X
YR 2016
FD 2016
LK https://uvadoc.uva.es/handle/10324/55941
UL https://uvadoc.uva.es/handle/10324/55941
LA eng
NO South african journal of enology and viticulture, Vol. 37, Nº 2, 2016, págs. 149-156
NO Producción Científica
DS UVaDOC
RD 30-jun-2024