terclim by ICS banner
IVES 9 IVES Conference Series 9 Open-GPB 9 Open-GPB-2024 9 Flash - Biotic interactions 9 The invasive seaweed Rugulopteryx okamurae: an innovative plant protective extract

The invasive seaweed Rugulopteryx okamurae: an innovative plant protective extract

Abstract

Grapevine downy mildew, caused by Plasmopara viticola, is a devastating disease worldwide. Most commercially important cultivars of the European grapevine are highly susceptible and therefore require the recurrent application of synthetic fungicides to control the disease, copper being the most frequently used. However, with European Union goals to lower their usage, there is a need to develop innovative and sustainable strategies. In this respect, seaweeds have proven to have great potential as phytosanitary agents, in addition to promoting plant growth and stress-tolerance.

A greenhouse experiment was conducted to determine the effectiveness of an extract of the invasive Rugulopteryx okamurae (RO) as resistance inducer and fungicide against P. viticola. The molecular and metabolic responses of two Tempranillo clones (VN40, RJ43), together with the changes on plant physiology and soil microbiota were investigated after seaweed applications and post-pathogen inoculation.

The extract preferentially induced Jasmonic acid (JA) related genes while inhibiting Salicylic acid (SA) responsive ones. In addition, in RO treated RJ43 plants SA pathway repression became stronger under P. viticola stress, and the antagonist relation between JA/SA pathways was corroborated. The later plants accumulated more piceid and had an increased activity of antioxidant enzymes. Moreover, RO slightly modified soil properties and soil fungal composition, the nematophagous biological control agent Harposporium being particularly high at seaweed treated RJ soils. Importantly, disease severity was reduced in RO treated plants indicating its ability to promote grapevine protection. All results suggest Ruguloperyx extract´s potential as palliative against P. viticola.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Article

Authors

Iratxe Zarraonaindia1,2*, Asier Cámara1, Juan José Córdoba-Granados3, Usue Pérez-López4, Enrico Cretazzo3, Amaia Mena-Petite5, Maite Lacuesta5, Ana Diez6, Emma Cantos-Villar3

1 Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa (Bizkaia), Spain
2 IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
3 Instituto de Investigación y Formación Agraria y Pesquera (IFAPA) Rancho de la Merced, Consejería de Agricultura, Pesca, Agua y Desarrollo Rural, Junta de Andalucía, Cádiz, Spain
4 Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, (UPV/EHU), Leioa (Bizkaia), Spain
5 Department of Plant Biology and Ecology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz (Araba), Spain
6 Neiker, Plant Protection and Production department, Campus Agroalimentario de Arkaute – E-01080 Vitoria-Gasteiz, Spain

Contact the author*

Keywords

Plasmopara viticola, Rugulopteryx okamurae, biostimulator, fungicide, microbiota

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Analysis of climatic changes in different areas of Abruzzo region (Central Italy): implications for grape growing

The dynamic evolution of some bioclimatic indices largely used to define the vocation of areas to grape growing was assessed over 43 years (1965-2007) in four sites of the Abruzzo Region (Central Italy).

How to deal with the Green Deal – Resistant grapevine varieties to reduce the use of pesticides in the EU

With its Farm-to-Fork Strategy, which is a part of the European Green Deal, the European Union aims at reducing the amount of pesticides used in agriculture by 50% until 2030. As viticulture uses around 70% of the fungicides in the EU, there is substantial pressure on winemakers to reduce their pesticide input. On top of the political goal, winegrowers face increased pressure from the public demanding a more sustainable production of wine.

A novel approach for the identification of new biomarkers of wine consumption in human urine using untargeted metabolomics

Wine is one of the most representative components of Mediterranean diet. Moderate wine intake together with food, has been positively correlated with reduced risk of many chronic diseases. This beneficial effect seems to be ascribed to elevated polyphenolic content of wine [1]. Traditional approaches for the identification of wine biomarkers consumption include targeted metabolomics that focuses on the quantification of well-defined metabolites, losing a valuable information about a massive number of compounds. On the other hand, untargeted metabolomics can disclose a large quantity of signals corresponding to potential biomarkers in a single analysis with high sensitivity and resolution.

Proposition of a simplified approach of the viticultural landscape

Une approche très simple de la lecture des paysages est proposée sur la base de l’expérience acquise par l’observation de divers terroirs du monde.

DNA-Free genome editing confers disease resistance in grapevine

Grapevine (Vitis Vinifera L.), one of the most important cultivated fruit crops, is facing significant challenges due to climate change. Specifically, increasing temperatures negatively impact the physiological traits and disrupt plant phenology. Additionally, increased virulence in pathogen attacks and pests leads to significant yield loss, requiring widespread application of plant protection products. Traditional agronomic practices offer only partial mitigation, requiring the development of precise and effective intervention strategies. The economic worth of viticulture has prompted continuous efforts in grapevine genetic improvement programs, traditionally involving conventional breeding and clonal selection that, however, are complex and time-consuming approaches.