scholarly journals Contrasting Susceptibilities to Flavescence Dorée in Vitis vinifera, Rootstocks and Wild Vitis Species

2016 ◽  
Vol 7 ◽  
Author(s):  
Sandrine Eveillard ◽  
Camille Jollard ◽  
Fabien Labroussaa ◽  
Dima Khalil ◽  
Mireille Perrin ◽  
...  
2019 ◽  
Vol 156 (3) ◽  
pp. 987-991
Author(s):  
Anikó Mátai ◽  
Péter Teszlák ◽  
Gábor Jakab

AbstractInvestigation of diseases caused by phytoplasmas, a group of cell-wall-less gram-positive bacteria has received significant attention in plant pathology. Grapevine is a host of two, genetically distinct phytoplasmas: Line Flavescence dorée (FD) phytoplasma associated to ‘flavescence dorée’ and ‘Candidatus Phytoplasma solani’ responsible for ‘bois noir’ (BN) disease. In the current study, we focused on BN diseased grapevines (Vitis vinifera L. cv. ‘Kékfrankos’), measured their photosynthetic performance and leaf hydrogen peroxide (H2O2) concentration. The latter is generally considered as a key molecule in the process of ‘recovery’ which is a spontaneous and unpredictable long-term remission of disease symptoms. This phenomenon also occurred during the time of our experiment. Infection resulted in reduced gas exchange performance and maximum quantum efficiency of PSII with an increased regulated non-photochemical quenching of PSII and H2O2 concentration. Changes in gas exchange seem to be a systemic response, while reduced photochemistry is a local response to ‘Ca. P. solani’ infection. H2O2 accumulation in BN phytoplasma infected plants, unlike in FD disease, was found to be a typical response to the appearance of a biotic stressor.


2020 ◽  
Vol 11 ◽  
Author(s):  
António Teixeira ◽  
Viviana Martins ◽  
Sarah Frusciante ◽  
Telmo Cruz ◽  
Henrique Noronha ◽  
...  

2010 ◽  
Vol 59 (2) ◽  
pp. 398-398 ◽  
Author(s):  
E. de Sousa ◽  
P. Casati ◽  
F. Cardoso ◽  
C. Baltazar ◽  
G. Durante ◽  
...  

Plant Disease ◽  
2021 ◽  
pp. PDIS-10-20-2103
Author(s):  
Laila Fayyaz ◽  
Alan Tenscher ◽  
Andy Viet Nguyen ◽  
Huma Qazi ◽  
M. Andrew Walker

The European grapevine (Vitis vinifera L.) has been cultivated in North America for about 500 years. One of the major limitations to its culture is the powdery mildew (PM) fungus, Erysiphe necator Schw. This study reports on the most extensive screening of Vitis species from the southwestern United States and northern Mexico for resistance to PM, testing 147 accessions of 13 Vitis species. In addition, Vitis vinifera cv. Carignane, a highly susceptible wine grape cultivar, was used as a reference to evaluate the effect of the inoculum 14 days postinoculation. Inoculation was done with a vacuum-operated settling tower using a broadly virulent isolate of E. necator, the C-strain. Resistant accessions (nine), moderately susceptible accessions (39), and highly susceptible accessions (99) were detected. The resistant accessions were then inoculated with an additional fungal isolate, e1-101, and they retained their resistance. Vitis species susceptibility was not associated with a North-South gradation, but Western species were more susceptible than Midwestern and Eastern species. All five of the V. monticola accessions were susceptible, as were the accessions of V. treleasei. The species V. acerifolia, V. candicans, V. cinerea, and V. × doaniana had significantly more resistant to moderately susceptible accessions compared with V. arizonica, V. berlandieri, V. californica, V. × champinii, V. girdiana, V. riparia, and V. rupestris, which had relatively more susceptible accessions than the other species. This research identified new sources of PM resistance in Vitis from the southwestern United States that could be incorporated into PM resistance breeding programs throughout the world.


2014 ◽  
Vol 127 (11) ◽  
pp. 2433-2451 ◽  
Author(s):  
Yingzhen Yang ◽  
Joanne A. Labate ◽  
Zhenchang Liang ◽  
Peter Cousins ◽  
Bernard Prins ◽  
...  

2019 ◽  
Vol 9 (1) ◽  
pp. 165
Author(s):  
Manuel J.R.A. Oliveira ◽  
Marta W. Vasconcelos ◽  
Inês C. Lemos ◽  
Assunta Bertaccini ◽  
Susana M.P. Carvalho

2020 ◽  
Author(s):  
Matteo Ripamonti ◽  
Mattia Pegoraro ◽  
Cristina Morabito ◽  
Ivana Gribaudo ◽  
Andrea Schubert ◽  
...  

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