Characterisation of Aureobasidium pullulans isolates from Vitis vinifera and potential biocontrol activity for the management of bitter rot of grapes

2018 ◽  
Vol 151 (3) ◽  
pp. 593-611 ◽  
Author(s):  
R. M. S. P. Rathnayake ◽  
S. Savocchia ◽  
L. M. Schmidtke ◽  
C. C. Steel
1999 ◽  
Vol 17 (3) ◽  
pp. 189-199 ◽  
Author(s):  
Leonardo Schena ◽  
Antonio Ippolito ◽  
Tirtza Zahavi ◽  
Lea Cohen ◽  
Franco Nigro ◽  
...  

2008 ◽  
Vol 98 (5) ◽  
pp. 580-584 ◽  
Author(s):  
J. M. Longland ◽  
T. B. Sutton

Bitter rot, caused by the fungus Greeneria uvicola, is one of the most important fruit rot diseases that threaten the burgeoning winegrape (Vitis vinifera) industry in the southeastern United States. Epidemiological studies were conducted to examine the period of fruit susceptibility of V. vinifera to G. uvicola, influence of temperature and duration of wetness on infection, and relative susceptibility of cultivars to bitter rot. In field studies, susceptibility of Merlot, Chardonnay, and Cabernet Franc fruit increased from bloom until véraison in 2003 and from bloom until 2 weeks before véraison in 2004. When detached V. vinifera fruit were inoculated and incubated at 14, 22, 26, and 30°C for 6, 12, 18 or 24 h of wetness, 22.4 to 24.6°C and 6 or 12 h of wetness were the optimal conditions for infection of fruit by G. uvicola. The relative susceptibility of 38 cultivars and selections, including 23 V. vinifera cultivars and five French-American hybrids, was determined in a detached fruit inoculation assay. A wide range in susceptibility was observed among the cultivars and selections. Fruit of cultivars of V. vinifera were significantly more susceptible than French-American hybrids. Isolates of G. uvicola differed in aggressiveness when tested on cv. Chardonnay.


2020 ◽  
Vol 11 ◽  
Author(s):  
Guzmán Carro-Huerga ◽  
Stéphane Compant ◽  
Markus Gorfer ◽  
Rosa E. Cardoza ◽  
Monika Schmoll ◽  
...  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Young Soo Kim ◽  
Younmi Lee ◽  
Wonsu Cheon ◽  
Jungwook Park ◽  
Hyeok-Tae Kwon ◽  
...  

AbstractBacillus genus produces several secondary metabolites with biocontrol ability against various phytopathogens. Bacillus velezensis AK-0 (AK-0), an antagonistic strain isolated from Korean ginseng rhizospheric soil, was found to exhibit antagonistic activity against several phytopathogens. To further display the genetic mechanism of the biocontrol traits of AK-0, we report the complete genome sequence of AK-0 and compared it with complete genome sequences of closely related strains. We report the biocontrol activity of AK-0 against apple bitter rot caused by Colletotrichum gloeosporioides, which could lead to commercialization of this strain as a microbial biopesticide in Korea. To retain its biocontrol efficacy for a longer period, AK-0 has been formulated with ingredients for commercialization, named AK-0 product formulation (AK-0PF). AK-0PF played a role in the suppression of the mycelial growth of the fungicide-resistant pathogen C. gloeosporioides YCHH4 at a greater level than the non-treated control. Moreover, AK-0PF exhibited greater disease suppression of bitter rot in matured under field conditions. Here, we report the complete genome sequence of the AK-0 strain, which has a 3,969,429 bp circular chromosome with 3808 genes and a G+C content of 46.5%. The genome sequence of AK-0 provides a greater understanding of the Bacillus species, which displays biocontrol activity via secondary metabolites. The genome has eight potential secondary metabolite biosynthetic clusters, among which, ituD and bacD genes were expressed at a greater level than other genes. This work provides a better understanding of the strain AK-0, as an effective biocontrol agent (BCA) against phytopathogens, including bitter rot in apple.


Author(s):  
María Berradre ◽  
Luzmila Meza ◽  
Braulio Zarzoso ◽  
Jorge Ortega ◽  
Betzabé Sulbarán ◽  
...  

Se realizó el aislamiento e identificación de levaduras nativas de un viñedo de la especie Vitis vinifera variedad Malvasía blanca, en la Región Zuliana. Se muestrearon aséptica y aleatoriamente bayas y partes de la planta (hojas, raquis, corteza y suelo), de un total de 123 plantas, correspondientes a un viñedo de la variedad de uva Malvasía. A aproximadamente a 500m del viñedo, se encuentra la bodega. La identificación de las levaduras aisladas en el viñedo se realizó por técnicas moleculares mediante PCR-RFLP, sometiendo los productos amplificados a un análisis de restricción con las enzimas Hinf I, Hae III, CfoI y DdeI.  La distribución de las levaduras en los diversos sustratos fue en el suelo 60% Hanseniaspora guillermondii y 40% Hanseniaspora uvarum, en la corteza 90% Candida sake y 10% Hanseniaspora uvarum, en hojas 100% por Rhodotorula mucilagenosa, en raquis 100% por Aureobasidium pullulans y en las bayas 96% Rhodotorula mucilagenosa y 4% Aureobasidium pullulans.  En el viñedo están ampliamente difundidos los géneros Ascomycetos Hanseniaspora, Candida y Aureobasidium y el género Basdiomycetos Rhodotorula, siendo las levaduras oxidativas Aureobasidium y Rhodotorula las de mayor difusión en el mismo, sin embargo, cabe destacar la presencia de levaduras fermentativas como los géneros Hanseniaspora y Candida, importantes levaduras con reconocido potencial enológico, que podrán ser utilizadas en futuras fermentaciones alcohólicas para obtener vinos con calidad única por ser fermentados con levaduras autóctonas adaptadas a clima tropical.  Palabras clave: levaduras autóctonas, variedad Malvasía, PCR-RFLP 5,8S.    ABSTRACT The isolation and identification of native yeasts from a vineyard of the Vitis vinifera white variety Malvasia was carried out in Zulia, Venezuela. Aseptically and randomly, berries and parts of the plant (leaves, rachis, bark and soil) were sampled from a total of 123 plants, corresponding to a vineyard of the Malvasia grape variety. A winery is located at approximately 500 m from the vineyard. The identification of the yeasts isolated in the vineyard was carried out by molecular techniques by PCR-RFLP, subjecting the amplified products to a restriction analysis with the enzymes Hinf I, Hae III, CfoI and DdeI. The distribution of the yeasts in the different substrates was in the soil 60% Hanseniaspora guillermondii and 40% Hanseniaspora uvarum, in the bark 90% Candida sake and 10% Hanseniaspora uvarum, in leaves 100% by Rhodotorula mucilagenosa, in rachis 100% by Aureobasidium pullulans and in berries 96% Rhodotorula mucilagenosa and 4% Aureobasidium pullulans. In the vineyard, the Ascomycetos type Hanseniaspora, Candida and Aureobasidium and the genus Basdiomycetos Rhodotorula are widely spread, with the oxidative yeasts Aureobasidium and Rhodotorula being the most widespread, however, the presence of fermentative yeasts such as the Hanseniaspora  and Candida genera, important yeasts with recognized oenological potential, which can be used in future alcoholic fermentations to obtain wines with unique quality by being fermented with native yeasts adapted to tropical climate. Key words: native yeasts, Malvasía variety, PCR-RFLP 5.8S.


Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
P Bolfa ◽  
F Sarac ◽  
A Filip ◽  
A Gal ◽  
M Taulescu ◽  
...  

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