terclim by ICS banner
IVES 9 IVES Conference Series 9 The role of phytoplasma effector interaction with phosphoglucomutase in the pathogenicity of ‘Candidatus Phytoplasma solani’ in grapevine 

The role of phytoplasma effector interaction with phosphoglucomutase in the pathogenicity of ‘Candidatus Phytoplasma solani’ in grapevine 

Abstract

Bois noir is the most widespread phytoplasma grapevine disease in Europe. It is associated with ‘CandidatusPhytoplasma solani’. In symptomatic grapevines cv. ‘Zweigelt’ infected with ‘Ca. P. solani’ compared with uninfected grapevines, metabolic pathways associated with phosphorylated sugar production were induced both at the transcriptional level and at the level of activity of the corresponding enzymes (Dermastia et al., 2021, Int. J. Mol. Sci.22: 3531). In particular, the expression of gene coding for phosphoglucoisomerase was upregulated, resulting in increased phosphoglucoisomerase enzyme activity. Phosphoglucoisomerase converse glucose-1-phosphate to glucose-6-phosphate, which can be used as a substrate for starch biosynthesis. Besides, phosphoglucomutase activity was induced also in Nicotiana benthamiana leaves transiently transformed with the construct of putative effector PoStoSP28, previously annotated as an antigenic membrane protein StAMP related to interaction of phytoplasma with its insect vector. Using a pull-down assay and in planta co-IP assay, we confirmed that PoStoSP28 interacts with both grapevine phosphoglucomutases. In transiently transformed N. benthamiana leaves, PoStoSP28 was localized in the nucleus and cytosol and accompanied by a distinct border at the periphery or just outside the nucleus and in the thread-like structures spanning the cells. Upon closer inspection, some autophagosome-like structures were found in N. benthamiana cells expressing the PoStoSP28 effector. Moreover, PoStoSP28 was not only localized in the autophagosome but also increased the occurrence of autophagosomes (Dermastia et al., 2023, Front. Plant Sci. 14: 1232367). Therefore, the results suggest that PoStoSP28 plays a role in the pathogenicity of phytoplasma in grapevine by interacting with grapevine phosphoglucomutase enzymes.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Article

Authors

Maruša Pompe Novak1,2*, Rebeka Strah1,3, Špela Tomaž1,3, Tjaša Lukan1, Anna Coll1, Maja Zagorščak1, Kristina Gruden1, Günter Brader4, Marina Dermastia1

1 Department of Biotechnology and Systems Biology, National Institute of Biology, Ljubljana, Slovenia
2 Faculty of Viticulture and Enology, University of Nova Gorica, Vipava, Slovenia
3 Jožef Stefan International Postgraduate School, Ljubljana, Slovenia
4 Bioresources Unit, Health & Environment Department, Austrian Institute of Technology, Tulln, Austria

Contact the author*

Keywords

grapevine, Candidatus Phytoplasma solani, effector, StAMP, phosphoglucomutase

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Harnessing biodiversity to improve grapevine rootstock adaptation to drought

Drought is one of the most challenging threats for viticulture because of its impact on reducing yield and on the composition of grapes.

Read More

Results of late-wurmian to present-day climatic-geological evolution on to spatial variability of pedologic-geological characters of the AOC Gaillac terroirs (Tarn, Midi-Pyrénées)

The AOC Gaillac area is divided into three main terroirs : « The left bank terraces », « The right bank coteaux » and
« The plateau Cordais ». This division is valid at a regional scale, but it suffers of a number of local-scale exceptions. This spatial variability of the pedologic-geologic characteristics at the plot scale has been derived mainly from the main late-Würmian solifluxion phase occurring at the transition between the peri-glacial climate and the Holocene temperate conditions (13,000-10,000 yrs BP).

Read More

Establishment of a geodatabase ‘for the characterization of the viticultural “terroirs” of “canton de Vaud” (Switzerland)

La caractérisation objective des terroirs viticoles est nécessaire pour mieux comprendre les relations existantes entre les sols, la plante et la qualité de la production vinicole. Dans le cadre d’une recherche sur les terroirs viticoles du canton de Vaud – Suisse, un géorépertoire pédologique et agronomique a été conçu et réalisé.

Read More

α-Terpinyl ethyl ether: stereoselective GC × GC confirmation and identification of its precursors in wine

Wines exhibit profound chemical complexity which arise from a diverse array of compounds that contribute to its sensory profile.

Read More

Determination of titratable acidity, sugar and organic acid content in red and white wine grape cultivars during ripening by VIS–NIR hy¬perspectral imaging

Grape harvest time is one of the most fundamental aspects that affect grape quality and thus wine quality. Many factors influence the decision of harvest; among them technological and phenolic maturity of grape. Technological ripeness is mainly related to sugar concentration, titratable acidity and pH. Conventional methods for chemical analysis of grapes are normally sample-destructive, time-consuming, include laborious sample preparation steps, and generate chemical waste, thereby limiting their utility in online/in-line quality monitoring. Moreover, destructive analyses can be performed only on a limited number of fruit pieces and, thus, their statistical relevance could be limited. This study evaluated the ability of a lab-scale hyperspectral imaging (HYP-IM) technique to predict titratable acidity, organic acid and sugar content of grapes. Samples of Cabernet franc and Chenin blanc grapes were consecutively collected six times at weekly intervals after veraison. The images were recorded thanks to the hyperspectral imaging camera Pica L (Resonon) in a spectral range from 400 to 1000 nm. Statistics were performed using Microsoft Xlstat software. Successively, the berries were analyzed for their sugar (glucose and fructose) and organic acid (malic and tartaric acid) content and titratable acidity according to usual methods.

Read More