GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 Impact of changing climatic factors on physiological and vegetative growth

Impact of changing climatic factors on physiological and vegetative growth


Context and purpose of the study – scientific information on grapevine response to predicted levels of climate parameters is scarce and not sufficient to properly position the Wine Industry for the future. It is critical that the combined effects of increased temperature and CO2 on grapevines should be examined, without omitting the important link to soil water conditions. The purpose of this study is to quantify the effects of envisioned changes in climatic parameters on the functioning and growth of young grafted grapevines under controlled conditions, simulating expected future climate changes. Scientific knowledge of precisely how the newly-planted grapevine will react morphologically, anatomically and physiologically (at leaf, root and whole plant level) to the expected changes in important climatic parameters will enable producers to make better-informed decisions regarding terroir, cultivar and rootstock choices as well as the adaptation of current cultivation practices.

Material and methods – four glass house compartments were set up with combinations of the two main environmental factors, namely ambient temperature and CO2. Within each compartment, another treatment factor, water supply, was introduced. Young, grafted grapevines were established in pots in a randomized block design. Five growth cycles of 12 weeks each were monitored, with Shiraz as scion cultivar in three of them and Merlot in the other two. The rootstock used throughout was 101-14 Mgt. Vegetative and physiological growth parameters were measured throughout the growth cycles with critical sampling times at 4, 8 and 12 weeks after planting.

Results – a change in environmental growth conditions significantly affected physiological activity of the grapevine. Both increased CO2 levels and adequate water supply increased photosynthetic activity for all treatment combinations. Newly planted vines were photosynthetically more active and reacted more strongly to treatments than slightly older vines. The higher temperature treatment seemed to impair photosynthesis under comparable CO2 and H2O conditions, especially with regards to very young vines. The effect of temperature on vegetative growth was insignificant compared to the CO2 and H2O effects and only seemed to affect initial growth directly after planting. The availability of water was critical to root, shoot and leaf growth – higher CO2 levels further enhanced vegetative growth.
The results indicate that the importance and impact of the climatic variables and the vine reaction change during the growth season. The strong interactions found between weeks after planting, available water, ambient temperature and CO2 levels necessitate multi-variable research on the effect of changing climatic factors on the grapevine.


Publication date: March 11, 2024

Issue: GiESCO 2019

Type: Poster



1 Cape Peninsula University of Technology (CPUT), Wellington, South Africa
2 University of Stellenbosch (US), Stellenbosch, South Africa
3 ARC Infruitec-Nietvoorbij, Stellenbosch, South Africa

Contact the author


Climate change, Grapevine, CO2, Temperature; Water deficit, Growth, Physiology


GiESCO | GiESCO 2019 | IVES Conference Series


Related articles…

Effects of soil and climate on wine style in Stellenbosch: Sauvignon blanc

Une étude a été menée pendant neuf ans sur deux vignes non-irriguées de Sauvignon blanc commercialisés, plantées à différentes localités (A et B) dans le district de Stellenbosch. Deux parcelles expérimentales, situées sur deux formations géologiques différentes, ont été identifiées au sein de chaque vignoble. A chaque localité une des

Etude préliminaire des influences pédoclimatiques sur les caractéristiques quali-quantitatives du cépage aglianico dans une zone de la province de benevento-ltalie

The need to classify the vineyards of an area according to the quality of its wines is not recent, but it is only in the last ten years that studies on the suitability of different areas for the cultivation of vineyard take on an integrated and interdisciplinary character (Boselli, 1991). The definition of the suitability of the environment is thus obtained by making the climatic, pedological, topographical and cultural information interact with the vegetative, productive and qualitative expression of the grape varieties.

Use of uv light for suppression of grapevine diseases

Microbial pathogens of plant have evolved to sense, interpret, and use light to direct their development. One aspect of this evolved relationship is photolyase-mediated repair of UV-induced damage to pathogen DNA. Application of germicidal UV (UV-C) at night circumvents the blue light-driven repair of pathogen DNA and allows non-phytotoxic doses of UV-C to suppress a variety of pathogenic microbes and even certain arthropod pests without damage to vines or fruit. Lamps arrays have been designed specifically for the canopy architecture of grapevines and have been deployed on both tractor-drawn and robotic carriages for partial to near-complete suppression of powdery mildew (Erysiphe necator), sour rot (fungal, bacterial, and arthropod complex), and downy mildew (Plasmopara viticola).

La zonazione viticola e i compiti dell’amministrazione regionale

Solo attraverso un adeguato intervento di estirpazione e reimpianto dei vigneti è possibile preservare, adeguare e valorizzare il patrimonio viticolo e le produzioni che da esso derivano.
Il reimpianto dei vigneti è pertanto da intendersi come una normale pratica agricola, alla pari della rimonta di stalla in campo zootecnico, ma può assumere toni problematici quando, come si verifica adesso in Toscana per una serie di circostanze legate alla profonda trasfor­mazione della viticoltura avvenuta negli ultimi 30 anni, troppi impianti giungono contem­poraneamente a fine ciclo produttivo e devono essere rinnovati.

Assessment of the bottled storage conditions on the volatile composition and sensorial characteristics of white wines

The quality of bottled white wines is highly influenced by their storage conditions, mainly temperature, and exposure to light and oxygen (1, 2).