Relationships between Water Status, Leaf Chlorophyll Content and Photosynthetic Performance in Tempranillo Vineyards
Abstract
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 the
feasibility of chlorophyll fluorescence parameters to assess water status in commercial vineyards. During
three consecutive seasons (2011 to 2013), 20 non-irrigated “Tempranillo” vineyard subzones were monitored
in 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 and
véraison. The results show that the water potential indicated weak to moderate stress in the study years
and decreased along the vegetative cycle, while foliar chlorophyll contents showed an increasing trend. The
correlation between both variables was not consistent. Linear regression of the chlorophyll fluorescence
parameters in dark-adapted leaves, Fo, Fv and Fv/Fm, over chlorophyll content was strong in all the
study years (higher determination coefficients for Fv/Fm at fruit set in 2012 and 2013). In general, the
water potential with low coefficients of variation showed a low effect on photosynthesis activity, although
values in variables such as Fm, Fv, Fv/Fm, Fs/Fo and ΦPSII registered an increasing trend when midday
leaf water potential decreased in the pre-véraison and véraison stages. These variables could be useful to
estimate water status in commercial vineyards for application in precision viticulture.
Downloads
A copyright form will be e-mailed to the corresponding author when the manuscript has been accepted for publication.
In principle, the Author agrees to the following when he/she signes the copyright agreement:
I hereby assign to the SOUTH AFRICAN SOCIETY FOR ENOLOGY AND VITICULTURE (SASEV) the copyright of the text, tables, figures, supplementary material, illustrations and other information (the Material) submitted with the manuscript to be published in SOUTH AFRICAN JOURNAL OF ENOLOGY AND VITICULTURE (SAJEV) (the "Article"). The copyright becomes effective from the date the Article has been accepted for publication in SAJEV.
This is an open access journal, and the authors and journal should be properly acknowledged, when works are cited.
Author's may use the publishers version for teaching purposes, in books, theses, dissertations, conferences and conference papers.
A copy of the authors' publishers version may also be hosted on the following websites:
- Non-commercial personal webpage or blog.
- Institutional webpage.
- Authors Institutional Repository.
The following notice should accompany such a posting on the website: This is an electronic version of an article published in SAJEV, Volume XXX, number XXX, pages XXX - XXX, DOI. Authors should also supply a hyperlink to the original paper or indicate where the original paper (www.journals.ac.za/index.php/sajev/) may be found.
Authors publishers version, affiliated with the Stellenbosch University will be automatically deposited in the University's Institutional Repository SUNScholar.
Articles as a whole, may not be re-published with another journal.
The following license applies:
Attribution CC BY-NC-ND 4.0