Isolation of Phytotoxic Phenols and Characterization of a New 5-Hydroxymethyl-2-isopropoxyphenol fromDothiorella vidmadera, a Causal Agent of Grapevine Trunk Disease

2018 ◽  
Vol 66 (8) ◽  
pp. 1760-1764 ◽  
Author(s):  
Pierluigi Reveglia ◽  
Sandra Savocchia ◽  
Regina Billones-Baaijens ◽  
Alessio Cimmino ◽  
Antonio Evidente
Keyword(s):  
Causal Agent ◽  
Trunk Disease ◽  
Grapevine Trunk Disease

Diploquinones A and B, Two New Phytotoxic Tetrasubstituted 1,4-Naphthoquinones from Diplodia mutila, a Causal Agent of Grapevine Trunk Disease

2018 ◽  
Vol 66 (45) ◽  
pp. 11968-11973 ◽  
Author(s):  
Pierluigi Reveglia ◽  
Sandra Savocchia ◽  
Regina Billones-Baaijens ◽  
Marco Masi ◽  
Alessio Cimmino ◽  
...  
Keyword(s):  
Causal Agent ◽  
Trunk Disease ◽  
Grapevine Trunk Disease

scholarly journals Characterization of Gnomoniopsis idaeicola, the Causal Agent of Canker and Wilting of Blackberry in Serbia

Plant Disease ◽  
2019 ◽  
Vol 103 (2) ◽  
pp. 249-258 ◽  
Author(s):  
Miloš Stevanović ◽  
Danijela Ristić ◽  
Svetlana Živković ◽  
Goran Aleksić ◽  
Ivana Stanković ◽  
...  
Keyword(s):  
Disease Incidence ◽  
Initial Step ◽  
First Record ◽  
Wide Distribution ◽  
Causal Agent ◽  
Control Measures ◽  
Molecular Features ◽  
Intraspecies Diversity ◽  
Specific Symptoms

Blackberry cane diseases with the symptoms of necrosis, canker, and wilting are caused by several fungi worldwide. Surveys conducted from 2013 to 2016 in Serbia revealed the occurrence of Gnomoniopsis idaeicola, the causal agent of cane canker and wilting, which was found to be distributed in almost half of the surveyed orchards, in three blackberry cultivars, and with disease incidence of up to 80%. Wide distribution and high disease incidence suggest that G. idaeicola has been present in Serbia for some time. Out of 427 samples, a total of 65 G. idaeicola isolates were obtained (isolation rate of 34.19%). Reference isolates, originating from different localities, were conventionally and molecularly identified and characterized. G. idaeicola was detected in single and mixed infections with fungi from genera Paraconiothyrium, Colletotrichum, Diaporthe, Botryosphaeria, Botrytis, Septoria, Neofusicoccum, and Discostroma, and no diagnostically specific symptoms could be related directly to the G. idaeicola infection. In orchards solely infected with G. idaeicola, blackberry plant mortality was up to 40%, and yield loses were estimated at 50%. G. idaeicola isolates included in this study demonstrated intraspecies diversity in morphological, biological, pathogenic, and molecular features, which indicates that population in Serbia may be of different origin. This is the first record of a massive outbreak of G. idaeicola infection, illustrating its capability of harmful influence on blackberry production. This study represents the initial step in studying G. idaeicola as a new blackberry pathogen in Serbia, aiming at developing efficient control measures.

scholarly journals Molecular characterization of Prunus necrotic ringspot virus isolated from rose in Brazil

2015 ◽  
Vol 45 (12) ◽  
pp. 2197-2200 ◽  
Author(s):  
Thor Vinícius Martins Fajardo ◽  
Monique Bezerra Nascimento ◽  
Marcelo Eiras ◽  
Osmar Nickel ◽  
Gilvan Pio-Ribeiro
Keyword(s):  
Amino Acid ◽  
Molecular Characterization ◽  
Molecular Analysis ◽  
Nucleotide Sequences ◽  
Amino Acid Sequences ◽  
Causal Agent ◽  
Ringspot Virus ◽  
Prunus Necrotic Ringspot Virus ◽  
First Time

ABSTRACT: There is no molecular characterization of Brazilian isolates of Prunus necrotic ringspot virus (PNRSV), except for those infecting peach. In this research, the causal agent of rose mosaic was determined and the movement (MP) and coat (CP) protein genes of a PNRSV isolate from rose were molecularly characterized for the first time in Brazil. The nucleotide and deduced amino acid sequences of MP and CP complete genes were aligned and compared with other isolates. Molecular analysis of the MP and CP nucleotide sequences of a Brazilian PNRSV isolate from rose and others from this same host showed highest identities of 96.7% and 98.6%, respectively, and Rose-Br isolate was classified in PV32 group.

scholarly journals A discovery 70 years in the making: characterization of the Rose rosette virus

2011 ◽  
Vol 92 (7) ◽  
pp. 1727-1732 ◽  
Author(s):  
Alma G. Laney ◽  
Karen E. Keller ◽  
Robert R. Martin ◽  
Ioannis E. Tzanetakis
Keyword(s):  
Rna Virus ◽  
Causal Agent ◽  
Low Diversity ◽  
The Usa ◽  
Rose Rosette ◽  
Diversity Studies ◽  
The Rose ◽  
Negative Sense ◽  
Eastern Half

Rose rosette was first described in the early 1940s and it has emerged as one of the most devastating diseases of roses. Although it has been 70 years since the disease description, the rosette agent is yet to be characterized. In this communication, we identify and characterize the putative causal agent of the disease, a negative-sense RNA virus and new member of the genus Emaravirus. The virus was detected in 84/84 rose rosette-affected plants collected from the eastern half of the USA, but not in any of 30 symptomless plants tested. The strong correlation between virus and disease is a good indication that the virus, provisionally named Rose rosette virus, is the causal agent of the disease. Diversity studies using two virus proteins, p3 and p4, demonstrated that the virus has low diversity between isolates as they share nucleotide identities ranging from 97 to 99%.

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