Aliki Tzima

Aliki Tzima
Agricultural University of Athens · Laboratory of Phytopathology

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18
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Publications

Publications (18)
Article
A comprehensive study was conducted on the prevalence of grapevine trunk diseases in Greece, focusing specifically on contamination of grapevine propagation material by Phaeomoniella chlamydospora and black foot disease‐related species. Additionally, detection of esca pathogen Fomitiporia mediterranea , causing white rot in grapevine and other wood...
Article
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Botryosphaeriaceous fungi are widespread, and cause serious diseases in many economically important crops. Botryosphaeria dothidea, Neofusicoccum mediterraneum and N. parvum are the most important members of this family in the Mediterranean region. These fungi are frequently isolated from the same host, which together with their extensive and incre...
Article
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In a previous study, tobacco plants, transformed with a sense construct of the 57K domain of the replicase gene of tobacco rattle virus (TRV), provided resistance against genetically distant isolates of the virus. In this work, 57K-specific siRNAs were detected with RT-qPCR solely in the resistant line verifying the RNA-silencing base of the resist...
Article
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Bacterial biological control agents (BCAs) have been increasingly used against plant diseases. The traditional approach to manufacturing such commercial products was based on the selection of bacterial species able to produce secondary metabolites that inhibit mainly fungal growth in optimal media. Such species are required to be massively produced...
Article
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Siderophores have mostly been studied concerning their contribution to the fitness and virulence of bacterial pathogens. In the present work, we isolated and characterized for the first time the siderophore bacillibactin from a commercial bacterial biocontrol agent.
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It has been suggested that some microorganisms, including plant growth-promoting rhizobacteria, manipulate the level of ethylene in plants by degrading 1-aminocyclopropane-1-carboxylic acid (ACC), an ethylene precursor, into α-ketobutyrate and ammonia, using ACC deaminase (ACCd). Here, we investigated whether ACCd of Verticillium dahliae, a soil-bo...
Article
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Pomegranate (Punica granatum) is a dynamically increasing alternative crop for Greece grown on more than 2,000 ha. In September 2016, a severe fruit rot disease of pomegranate cv. Wonderful was observed in fields of Lamia, Fthiotida, Greece. Symptoms appeared after heavy early-autumn rainfalls, on fruits that were mainly at the lower part of the tr...
Article
Quinone outside inhibitors (QoI) are powerful fungicides, which have been reported, additionally to their fungicide activity, to increase plant capacity to activate cellular defense responses and to promote plant growth. In this work, the effect of the QoI class fungicide pyraclostrobin was examined against Cucumber mosaic virus (CMV), Potato virus...
Article
In spite of their widespread occurrence, only few host jumps by plant viruses have been evidenced and the molecular bases of even fewer have been determined. A combination of three independent approaches, 1) experimental evolution followed by reverse genetics analysis, 2) positive selection analysis, and 3) locus-by-locus analysis of molecular vari...
Article
The fungus Ceratocystis platani was detected in various localities of the Gjirokastër prefecture in southern Albania, where it was causing widespread mortality on Platanus orientalis trees. The identification of the fungus was based on both morphological characteristics in culture and DNA sequencing. The pathogenicity of C. platani was confirmed in...
Article
Thielaviopsis basicola is a hemibiotrophic root pathogen causing black root rot in a wide range of economically important crops. Our initial attempts to transform T. basicola using standard Agrobacterium tumefaciens–mediated transformation (ATMT) protocols were unsuccessful. Successful transformation required the addition of V8 juice (to induce ger...
Article
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The ß-1,6-endoglucanase gene (vegB) of Verticillium dahliae was isolated using a genome walking technique. Nucleotide and deduced amino acid sequences of the gene showed high identity with the PAN1 sequence deposited at the Verticillium genome database (Broad Institute), but significant differences in intron numbers and sites of insertion. Detailed...
Article
To gain insight into the role of G protein-mediated signaling in virulence and development of the soilborne, wilt causing fungus Verticillium dahliae, the G protein β subunit gene (named as VGB) was disrupted in tomato race 1 strain of V. dahliae. A resulting mutant strain, 70ΔGb15, displayed drastic reduction in virulence, increased microsclerotia...
Article
Verticillium dahliae is a soilborne fungus causing vascular wilt in a diverse array of plant species. Its virulence has been attributed, among other factors, to the activity of hydrolytic cell wall-degrading enzymes (CWDE). The sucrose nonfermenting 1 gene (VdSNF1), which regulates catabolic repression, was disrupted in V. dahliae tomato race 1. Ex...
Article
Verticillium dahliae is a soilborne fungus that causes vascular wilt disease in a broad range of hosts and survives for many years in the soil in the form of microsclerotia. Although the role of cAMP-dependent protein kinase A (PKA) has been extensively studied in foliar pathogens, there is limited information about its role in soilborne fungal pat...
Article
Nicotiana tabacum plants were transformed with the 57-kDa read-through domain of the replicase gene of Tobacco rattle virus (TRV) isolate SYM. From a total of six lines containing the viral transgene, four displayed various levels of resistance to TRV infection. Transgenic plants from line 81G were highly resistant to foliar rub-inoculation with th...
Article
Mutants of Ustilago maydis (DC) Corda with high resistance to azoxystrobin (RF 164 to 4714, based on EC50 values), an inhibitor of mitochondrial electron transport at the cytochrome bc1 complex, were isolated in a mutation frequency of 2.3 x 10(-7) after nitrosoguanidine mutagenesis and selection on media containing 1 microgram ml-1 azoxystrobin in...

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