terclim by ICS banner
IVES 9 IVES Conference Series 9 Exploring the regulatory role of the grapevine MIXTA homologue in cuticle formation and abiotic stress resilience

Exploring the regulatory role of the grapevine MIXTA homologue in cuticle formation and abiotic stress resilience

Abstract

The outer waxy layer of plant aerial structures, known as the cuticle, represents an important trait that can be targeted to increase plant tolerance against abiotic stresses exacerbated by environmental transition. The MIXTA transcription factor, member of the R2R3-MYB family, is known to affect conical shape of petal epidermal cells in Anthirrinum, cuticular thickness in tomato fruit and trichome formation and morphology in several crops. The aim of this study was to investigate the role of the grapevine MIXTA homologue by phenotypic and molecular characterization of overexpressing and knock-out grapevine lines. The leaf cuticle was observed by light microscopy, indicating that stomatal density and other anatomical features, such as trichomes and pavement cell number, were affected by modulation of VviMIXTA. GC-MS analysis found that epicuticular wax loads and composition were similarly impacted. Physiological parameters collected on a randomized set of plants in controlled conditions showed that stomatal conductance was also affected. Selected lines, identified via VviMIXTA gene expression analysis, underwent RNA-seq to evaluate the transcriptomic impact of modulating VviMIXTA expression. The results were cross-referenced with DAP-seq data to identify MIXTA high confidence target genes. Additionally, further integration of the experimental data with in silico resources available for grapevine (e.g., OneGenE and aggregated tissue-specific GCNs) is being conducted for reconstructing MIXTA´s gene regulatory network. Our work explores the potential regulatory role of VviMIXTA in epidermal cell fate and cuticular wax composition in the grapevine leaf, paving the way for molecular breeding to enhance plant resilience and improve berry quality traits.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Carlotta Pirrello1*, Jenna Bryanne Jolliffe1,2, Lorenzo Vittani1, Luis Orduña3, Paolo Sonego1, Michele Faralli1,4, José Tomás Matus3, Stefania Pilati1, Justin Graham Lashbrooke2,5, Claudio Moser1

1 Research and Innovation Centre, Edmund Mach Foundation, San Michele all’Adige, 38098, Italy
2 South African Grape and Wine Research Institute, Stellenbosch University, Stellenbosch, 7600, South Africa
3 Institute for Integrative Systems Biology (I2SysBio), Universitat de Valencia-CSIC, Paterna, 46908, Valencia, Spain
4 Center Agriculture Food Environment (C3A), University of Trento, via Mach 1, San Michele all’Adige, 38098, Italy
5 Department of Genetics, Stellenbosch University, Stellenbosch, 7600, South Africa

Contact the author*

Keywords

Vitis vinifera, cuticle, stomata, trichomes, multi-omics data

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

MicrobiomeSupport: Towards coordinated microbiome R&I activities in the food system to support (EU and) international bioeconomy goals

Microbiomes have crucial roles in maintaining life on Earth, and their functions drive human, animal, plant and environmental health. The microbiome research landscape is developing rapidly and is performed in many different science fields using similar concepts but mostly one (eco)system at-a-time. Thus, we are only starting to unravel and understand the interconnectedness of microbiomes across the (eco)systems.

Monitoring grapevine water status using Landsat 8 images: a two-year case study in a Merlot vineyard

Viticulture needs for spatial and temporal information are increasing to improve vineyard management, especially concerning water efficiency. Remote sensing, particularly from satellites, can be a powerful tool to assess vineyard characteristics such as vigor or water status in space-time. In this study, we use Landsat 8, an American Earth observation satellite with six bands from the visible (VIS) to the Short-Wave Infrared (SWIR) domains with 30m spatial resolution and two thermal bands with 100m spatial resolution.

Effect of kaolin foliar application on grape cultivar Assyrtiko (Vitis vinifera L.) under vineyard conditions

In the context of climate change and for the sustainable exploitation of Mediterranean vineyards, it is necessary to use new strategies to adapt to the new climatic conditions.

Impact of monopolar and bipolar pulsed electric fields on the quality of Tinta Roriz wines

Pulsed electric fields (pef) technology holds significant promise for the agrifood industry, considering the capacity of inducing cell electroporation, due to the disruption of cellular membranes. Pef-induced permeabilization is dependent of the chosen treatment protocol (i.e. Pulse shape, electrical field strength, specific energy) and of the matrix’s characteristics (i.e. Cell radii and size, ph, electrical conductivity).

Viticultural heritage in mountain territories of Catalonia: prospecting in the region of Osona, northern Spain

The recovery of ancestral or minority vine varieties has been gaining great interest in recent years, among other reasons because it is likely that some of these varieties, due to the fact that they are found in relict areas, have a greater potential for adaptation to external factors (biotic or abiotic) and can minimize the effects that climate change is causing in viticulture. Varieties that can be grown at altitude are currently being sought to combat rising temperatures and prolonged extreme drought conditions. In Catalonia, the Pyrenean expansion of vineyard cultivation is documented from the 10th century and has been related to the “small climatic optimum” (9th-12th centuries) and also to seigniorial power.[1] But different adverse climatic periods and the arrival of Phylloxera by the late 19th century made many of these crops disappear.[2]