terclim by ICS banner
IVES 9 IVES Conference Series 9 Effects of stress memory on grapevine resilience in response to recurrent drought and recovery events 

Effects of stress memory on grapevine resilience in response to recurrent drought and recovery events 

Abstract

Plants have evolved different strategies to cope with environmental stresses and, although still debated, it was observed that they can remember past stress occurrence.

Anatomical and physiological adjustments have been observed in different grapevine cultivars after repeated drought exposure, however epigenetic, transcriptional and biochemical changes associated with drought-primed ecological memory have been poorly studied.

This work was conceived to test whether exposure to recurring events of mild drought could prime vines to endure severe drought stress. Particularly, we investigated whether the expected improved stress tolerance of Vitis vinifera cv Nebbiolo plants subjected over years to moderate and long-lasting water stress events (WS-primed) depended on molecular memory phenomena or on resetting of stress-induced signals. To this aim, a combined multidisciplinary approach, involving eco-physiological, anatomical, biochemical and molecular analyses was adopted. First results revealed that WS-primed vines had reduced gas exchange in well-watered conditions, but at the end of WS imposition were able to maintain higher transpiration and assimilation rates with respect to unprimed plants. Moreover, WS-primed plants accumulated lower amounts of root abscisic acid and had higher content of resveratrol and viniferin, suggesting an increased antioxidant capacity that could help them in counteracting stress effects at the cellular level. WGBS analysis is ongoing to profile changes in DNA methylation landscapes in search of epigenetic signatures associated with specific transcriptome and physiological modifications.

In a future perspective, the gained information will deliver a predictive framework to estimate the impact of moderately dry periods on vine performance, considering memory-associated protective effects against drought.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Article

Authors

Amedeo Moine1, Paolo Boccacci1, Walter Chitarra1,2, Luca Nerva1,2, Giorgio Gambino1, Irene Perrone1, Chiara Pagliarani1*

1 Institute for Sustainable Plant Protection, National Research Council (IPSP-CNR), Strada delle Cacce 73, 10135 Torino (Italy)
2 Research Centre for Viticulture and Enology, Council for Agricultural Research and Economics (CREA-VE), Via XXVIII Aprile 26, 31015 Conegliano (Italy)

Contact the author*

Keywords

eco-physiology, recurring drought, priming, transcriptome reprogramming, epigenetic signature

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

A survey on the rotundone content of 18 grape varieties sourced from a germplasm 

Rotundone, the pepper aroma compound, has been detected in wines made from a large number of grape varieties. However, given the fact that analyzed wines were sourced from different winegrowing regions and seasons, made using different winemaking techniques and at different scales, it remains difficult to assess the real variety potential to produce rotundone.

Estimation of degree brix in grapes by proximal hyperspectral sensing and nanosatellite imagery through the random forest regressor

The assessment of physiological parameters in vineyards can be done by direct measurements or by remote, indirect methods. The latter option frequently yields useful data, and development of methods and techniques that make them possible is worthwhile. One of the parameters most looked for to define the quality status of a vineyard is the degree Brix of its grapes, a quantity usually determined by direct measurement.

Effect of post-harvest ozone treatment on secondary metabolites biosynthesis and accumulation in grapes and wine

The actual demand by consumers for safer and healthier food and beverage is pushing the wine sector to find alternative methods to avoid the use of sulphur dioxide in winemaking. Ozone is already used in the wine industry to produce sulphur dioxide-free wines through the patented method Purovino®.

The impact of vine pruning methods on physiological development and health condition of Vitis vinifera

This project aims on monitoring the plant development and comparison of the effects of various training systems on vine fertility and physiological processes.

EFFECTS OF BIODYNAMIC VINEYARD MANAGEMENT ON GRAPE RIPENING MECHANISMS

Biodynamic agriculture, founded in 1924 by Rudolph Steiner, is a form of organic agriculture. Through a holistic approach, biodynamic agriculture seeks to preserve the diversity of agriculture and the existing interactions between the mineral world and the different components of the organic world. Biodynamic grape production involves the use of composts, herbal teas and mineral preparations such as 500, 501 and CBMT.
Several scientific studies have provided evidence on the effects of biodynamic farming on the soil, the plant and the wine. Numerous empirical opinions of wine growers support the existence of differences brought by such a management.