terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Effects of progeny in the modulation of the response to water stress in isohydric and anisohydric varieties

Effects of progeny in the modulation of the response to water stress in isohydric and anisohydric varieties

Abstract

Each grapevine variety has a specific water use regulation response under drought, and it is still unclear whether this regulation results from innate genotypic behavior (iso- and anisohydric), or is a response to environmental factors, namely recurrent water stress priming effects. In the present work, we explored the influence of the field-grown genotypes’ drought memory in the drought-response phenotype of their vegetative progenies, in Trincadeira (isohydric) and Castelão (anisohydric) varieties under a drought event followed by recovery in a glasshouse. Cuttings from both cultivars subjected to full irrigation (FI) and non-irrigation (NI) treatments for 5 consecutive years were used. Progenies were subjected to two irrigation treatments, well-watered (WW), where the soil was kept at field capacity, and water-stress (WS), where irrigation was withheld for 7 days. WS plants were then re-watered and kept at field capacity for 72h. Measurements and sampling were done in both progenies of both treatments, at 0h, 72h and 168h after the beginning of the treatment and after 24h and 72h of recovery. NI progenies from both cultivars had improved gas exchange parameters, better total plant hydraulic conductance under drought, and faster recovery than FI progenies. Nocturnal and diurnal transpiration were affected both by progeny and treatment. Leaf wax content was significantly enhanced by WS in both progenies, but it was higher in NI progenies. Stomatal conductance kinetic showed differences in the timing of stomatal aperture between progenies, in particular after water recovery. Leaf temperature (Tc) was similar in both varieties and progenies, but higher temperatures were measured under WS. Leaf temperature only recovered 72h after re-watering. Although isohydric and anisohydric genotypes exhibited different drought acclimation responses due to their inner genetic behavior, their underlying hydraulic, stomatal and photosynthetic regulatory mechanisms were also affected by historical origin. In this presentation, fundamental insights about potential priming mechanisms in grapevine will be further discussed.

DOI:

Publication date: October 5, 2023

Issue: ICGWS 2023

Type: Article

Authors

Olfa Zarrouk1,2†, João de Deus3*, Miguel Damasio3*, Ana Rodrigues4, José Silvestre3, Luisa Carvalho1†

1LEAF – Linking Landscape, Environment, Agriculture and Food Research Centre, Associate Laboratory TERRA, ISA-ULisboa, Lisboa, Portugal
2SFCoLAB – Laboratório Colaborativo para a Inovação Digital na Agricultura, Torres Vedras, Portugal
3INIAV – Instituto Nacional de Investigação Agrária e Veterinária, I.P., Oeiras, Portugal
4CEF – Centro de Estudos Florestais, Associate Laboratory TERRA, ISA-ULisboa, Lisboa, Portugal

Contact the author*

;

Keywords

thermal imaging, hydraulic conductance, stomatal conductance, transpiration

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Reduction of the height of the canopy in fruit set and in pea size: vegetative, productive and maturation effects, in cv. Verdejo

Global warming is accelerating the technological ripening of the grape, with a loss of acidity, which requires that vineyard management can delay ripening to avoid it. The source-sink relation is essential for grape ripening, since it affects the distribution of photosynthates and substances derived from plant metabolism. A work is proposed to know the response of the vineyard to the drastic reduction of the foliar surface by trim down the shoots in cv.

Read More

Ability of lactic acid bacterial laccases to degrade biogenic amines and OTA in wine

Two of the most harmful microbial metabolites for human health that can be present in wines and either fermented or raw foods are biogenic amines (BA) and ochratoxine A (OTA). Winemakers are aware of the need to avoid their presence in wine by using different strategies, one of them is the use of enzymes. Some recombinant laccases have been characterized and revealed as potential tools to degrade these toxic compounds in wine[1], specifically biogenic amines[2].

Read More

Limiting magnesium availability: a novel approach to managing brettanomyces spoilage in winemaking

Brettanomyces is a world-renowned yeast that negatively impacts the chemical composition of wines through the production of metabolites that negatively impact the sensory properties of the final product. Its resilience in wine conditions and ability to produce off-flavors make it a challenge for winemakers. Currently, the primary control technique involves adding sulfur dioxide (SO2); however, some Brettanomyces strains are developing resistance to this preservative agent. [1] Therefore, new management strategies are necessary to control this spoilage yeast.

Read More

Metatranscriptomic analysis of “aszú” berries: the potential role of the most important species of the grape microbiota in the aroma of wines with noble rot

Botrytis cinerea has more than 1200 host plants and is one of the most important plant pathogens in viticulture. Under certain environmental conditions, it can lead to the development of a noble rot, which results in a specific metabolic profile, altering physical texture and chemical composition. The other microbes involved in this process and their functional genes are poorly characterised. We have generated metatranscriptomic [1,2] and DNA metabarcoding data from three months of the Furmint grape variety, representing the four phases of noble rot, from healthy berries to completely dried berries.

Read More

Exploring the genetic diversity of leaf flavonoids content in a set of Iberian grapevine cultivars: preliminary results

The use of grapevine genetic diversity is a way to mitigate the negative impacts of climate change on viticulture systems. Leaf epidermal flavonoids (including flavonols and anthocyanins) are involved in plant defense mechanisms against environmental stresses, like high temperatures or excessive solar radiation [1,2]. Among other factors, they modulate light absorption, which reduces photoinhibition processes in photosynthetic tissues [1]. Therefore, the identification of grapevine cultivars with an increased content on leaf epidermal flavonoids arises as a potential avenue to improve grapevine tolerance to some detrimental environmental stresses.

Read More