The Physiological Impact of GFLV Virus Infection on Grapevine Water Status: First Observations

The Physiological Impact of GFLV Virus Infection on Grapevine Water Status: First Observations

In a vineyard, grapevines are simultaneously exposed to combinations of several abiotic (drought, extreme temperatures, salinity) and biotic stresses (phytoplasmas, viruses, bacteria). With climate change, the incidences of drought in vine growing regions are increased and the host range of pathogen...

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Bibliographic Details
Published in:Plants (Basel) Vol. 11; no. 2; p. 161
Main Authors: Jež-Krebelj, Anastazija, Rupnik-Cigoj, Maja, Stele, Marija, Chersicola, Marko, Pompe-Novak, Maruša, Sivilotti, Paolo
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 07-01-2022
MDPI
Subjects:
Abiotic stress
Abscisic acid
Biosynthesis
Climate change
Dioxygenase
Drought
Enzymes
Flowers & plants
gene expression
Genes
GFLV
Global warming
grapevine
Grapevines
Hormones
Host range
Infections
Occlusion
Pathogens
Physiology
Priming
Salinity
Vessels
Vines
Vineyards
virus infection
Viruses
water status
Water stress
Xylem
xylem vessel occlusion
GFLV
xylem vessel occlusion
grapevine
water status
gene expression
virus infection
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Summary:In a vineyard, grapevines are simultaneously exposed to combinations of several abiotic (drought, extreme temperatures, salinity) and biotic stresses (phytoplasmas, viruses, bacteria). With climate change, the incidences of drought in vine growing regions are increased and the host range of pathogens with increased chances of virulent strain development has expanded. Therefore, we studied the impact of the combination of abiotic (drought) and biotic ( (GFLV) infection) stress on physiological and molecular responses on the grapevine of cv. Schioppettino by studying the influence of drought and GFLV infection on plant water status of grapevines, on grapevine xylem vessel occlusion, and on expression patterns of 9-cis-epoxycarotenoid dioxygenase 1 ( ), 9-cis-epoxycarotenoid dioxygenase 2 ( ), encoding transcription factor ( ) and -like protein ( ) genes in grapevines. A complex response of grapevine to the combination of drought and GFLV infection was shown, including priming in the case of grapevine water status, net effect in the case of area of occluded vessels in xylem, and different types of interaction of both stresses in the case of expression of four abscisic acid-related genes. Our results showed that mild (but not severe) water stress can be better sustained by GFLV infection rather than by healthy vines. GFLV proved to improve the resilience of the plants to water stress, which is an important outcome to cope with the challenges of global warming.
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ISSN:2223-7747
2223-7747
DOI:10.3390/plants11020161