TY  - JOUR
AU  - Kosovac, Andrea
AU  - Jakovljević, Miljana
AU  - Krstić, Oliver
AU  - Cvrković, Tatjana
AU  - Mitrović, Milana
AU  - Toševski, Ivo
AU  - Jović, Jelena
PY  - 2019
UR  - https://plantarum.izbis.bg.ac.rs/handle/123456789/565
AB  - Bois noir (BN), a grapevine yellows disease induced by Candidatus Phytoplasma solani', is spreading and diversifying in several wine-producing regions of Europe, causing increased yield losses and economic concerns. The planthopper Hyalesthes obsoletus (Hemiptera: Cixiidae) is a major vector of the pathogen that causes BN disease in grapevine. Recent studies suggest that epidemiology of BN is affected by the interaction of specific host races of H. obsoletus with weedy host plants that serve as reservoirs for the pathogen. Since BN is common in grape-growing regions of Serbia, a survey was conducted during 2015-2016 to evaluate the host-plant association and vector role of H. obsoletus in central and eastern regions. We tested populations of H. obsoletus associated with Convolvulus arvensis (field bindweed) a known host for the vector and pathogen and Crepis foetida (stinking hawk's-beard) a newly identified host in southeastern Europe. Molecular phylogenetic analyses of H. obsoletus collected from C. arvensis and C. foetida using the mtDNA COI marker determined that the two populations had a genetic divergence of 1.4%. Transmission trials confirmed the vector role of C. arvensis-associated H. obsoletus and identified C. foetida-associated populations as a new and efficient host-specialized vector of BN. Each of the two host-specialized vector populations transmitted Ca. P. solani' to its original host (C. arvensis or C. foetida) and to grapevine cv. Chardonnay. Multilocus genotyping of the transmitted phytoplasma isolates based on tuf/stamp/vmp1 Ca. P. solani'-specific loci indicated pathogen segregation according to the host-plant association of the vector. All isolates transmitted by C. foetida-associated H. obsoletus were of the STOL genotype (tuf-b/STOL/V2-TA), while the C. arvensis-associated population transmitted several genotypes: tuf-b/Rqg50/V4, tuf-b/Rqg50/V14, tuf-b/Rqg31/V14 and tuf-b/Vv24/V14. This study provides evidence of a new independent BN epidemiological cycle of tuf-b Ca. P. solani' strain in the Balkan region, sourced by C. foetida and transmitted by its associated H. obsoletus population.
PB  - Springer, Dordrecht
T2  - European Journal of Plant Pathology
T1  - Role of plant-specialized Hyalesthes obsoletus associated with Convolvulus arvensis and Crepis foetida in the transmission of "Candidatus Phytoplasma solani'-inflicted bois noir disease of grapevine in Serbia
EP  - 195
IS  - 1
SP  - 183
VL  - 153
DO  - 10.1007/s10658-018-1553-1
ER  - 

@article{
author = "Kosovac, Andrea and Jakovljević, Miljana and Krstić, Oliver and Cvrković, Tatjana and Mitrović, Milana and Toševski, Ivo and Jović, Jelena",
year = "2019",
abstract = "Bois noir (BN), a grapevine yellows disease induced by Candidatus Phytoplasma solani', is spreading and diversifying in several wine-producing regions of Europe, causing increased yield losses and economic concerns. The planthopper Hyalesthes obsoletus (Hemiptera: Cixiidae) is a major vector of the pathogen that causes BN disease in grapevine. Recent studies suggest that epidemiology of BN is affected by the interaction of specific host races of H. obsoletus with weedy host plants that serve as reservoirs for the pathogen. Since BN is common in grape-growing regions of Serbia, a survey was conducted during 2015-2016 to evaluate the host-plant association and vector role of H. obsoletus in central and eastern regions. We tested populations of H. obsoletus associated with Convolvulus arvensis (field bindweed) a known host for the vector and pathogen and Crepis foetida (stinking hawk's-beard) a newly identified host in southeastern Europe. Molecular phylogenetic analyses of H. obsoletus collected from C. arvensis and C. foetida using the mtDNA COI marker determined that the two populations had a genetic divergence of 1.4%. Transmission trials confirmed the vector role of C. arvensis-associated H. obsoletus and identified C. foetida-associated populations as a new and efficient host-specialized vector of BN. Each of the two host-specialized vector populations transmitted Ca. P. solani' to its original host (C. arvensis or C. foetida) and to grapevine cv. Chardonnay. Multilocus genotyping of the transmitted phytoplasma isolates based on tuf/stamp/vmp1 Ca. P. solani'-specific loci indicated pathogen segregation according to the host-plant association of the vector. All isolates transmitted by C. foetida-associated H. obsoletus were of the STOL genotype (tuf-b/STOL/V2-TA), while the C. arvensis-associated population transmitted several genotypes: tuf-b/Rqg50/V4, tuf-b/Rqg50/V14, tuf-b/Rqg31/V14 and tuf-b/Vv24/V14. This study provides evidence of a new independent BN epidemiological cycle of tuf-b Ca. P. solani' strain in the Balkan region, sourced by C. foetida and transmitted by its associated H. obsoletus population.",
publisher = "Springer, Dordrecht",
journal = "European Journal of Plant Pathology",
title = "Role of plant-specialized Hyalesthes obsoletus associated with Convolvulus arvensis and Crepis foetida in the transmission of "Candidatus Phytoplasma solani'-inflicted bois noir disease of grapevine in Serbia",
pages = "195-183",
number = "1",
volume = "153",
doi = "10.1007/s10658-018-1553-1"
}

Kosovac, A., Jakovljević, M., Krstić, O., Cvrković, T., Mitrović, M., Toševski, I.,& Jović, J.. (2019). Role of plant-specialized Hyalesthes obsoletus associated with Convolvulus arvensis and Crepis foetida in the transmission of "Candidatus Phytoplasma solani'-inflicted bois noir disease of grapevine in Serbia. in European Journal of Plant Pathology
Springer, Dordrecht., 153(1), 183-195.
https://doi.org/10.1007/s10658-018-1553-1

Kosovac A, Jakovljević M, Krstić O, Cvrković T, Mitrović M, Toševski I, Jović J. Role of plant-specialized Hyalesthes obsoletus associated with Convolvulus arvensis and Crepis foetida in the transmission of "Candidatus Phytoplasma solani'-inflicted bois noir disease of grapevine in Serbia. in European Journal of Plant Pathology. 2019;153(1):183-195.
doi:10.1007/s10658-018-1553-1 .

Kosovac, Andrea, Jakovljević, Miljana, Krstić, Oliver, Cvrković, Tatjana, Mitrović, Milana, Toševski, Ivo, Jović, Jelena, "Role of plant-specialized Hyalesthes obsoletus associated with Convolvulus arvensis and Crepis foetida in the transmission of "Candidatus Phytoplasma solani'-inflicted bois noir disease of grapevine in Serbia" in European Journal of Plant Pathology, 153, no. 1 (2019):183-195,
https://doi.org/10.1007/s10658-018-1553-1 . .

TY  - JOUR
AU  - Kosovac, Andrea
AU  - Johannesen, Jes
AU  - Krstić, Oliver
AU  - Mitrović, Milana
AU  - Cvrković, Tatjana
AU  - Toševski, Ivo
AU  - Jović, Jelena
PY  - 2018
UR  - https://plantarum.izbis.bg.ac.rs/handle/123456789/547
AB  - The stolbur phytoplasma vector Hyalesthes obsoletus is generally considered as a polyphagous species associated with numerous wild and cultivated plants. However, recent research in southeastern Europe, the distribution centre of H. obsoletus and the area of most stolbur-inflicted crop diseases, points toward specific host-plant associations of the vector, indicating specific vector-based transmission routes. Here, we study the specificity of populations associated with four host-plants using mitochondrial and nuclear genetic markers, and we evaluate the evolution of host-shifts in H. obsoletus. Host-plant use was confirmed for Convolvulus arvensis, Urtica dioica, Vitex agnus-castus and Crepis foetida. Mitochondrial genetic analysis showed sympatric occurrence of three phylogenetic lineages that were ecologically delineated by host-plant preference, but were morphologically inseparable. Nuclear data supported the existence of three genetic groups (Evanno's Delta K(3) = 803.72) with average genetic membership probabilities  gt  90%. While populations associated with C. arvensis and U. dioica form a homogenous group, populations affiliated with V. agnus-castus and C. foetida constitute two independent plant-associated lineages. The geographical signal permeating the surveyed populations indicated complex diversification processes associated with host-plant selection and likely derived from post-glacial refugia in the eastern Mediterranean. This study provides evidence for cryptic species diversification within H. obsoletus sensu lato: i) consistent mitochondrial differentiation (1.1-1.5%) among host-associated populations in syntopy and in geographically distant areas, ii) nuclear genetic variance supporting mitochondrial data, and iii) average mitochondrial genetic distances among host-associated meta-populations are comparable to the most closely related, morphologically distinguishable species, i.e., Hyalesthes thracicus (2.1-3.3%).
PB  - Public Library of Science (PLoS)
T2  - PlOS One
T1  - Widespread plant specialization in the polyphagous planthopper Hyalesthes obsoletus (Cixiidae), a major vector of stolbur phytoplasma: Evidence of cryptic speciation
IS  - 5
VL  - 13
DO  - 10.1371/journal.pone.0196969
ER  - 

@article{
author = "Kosovac, Andrea and Johannesen, Jes and Krstić, Oliver and Mitrović, Milana and Cvrković, Tatjana and Toševski, Ivo and Jović, Jelena",
year = "2018",
abstract = "The stolbur phytoplasma vector Hyalesthes obsoletus is generally considered as a polyphagous species associated with numerous wild and cultivated plants. However, recent research in southeastern Europe, the distribution centre of H. obsoletus and the area of most stolbur-inflicted crop diseases, points toward specific host-plant associations of the vector, indicating specific vector-based transmission routes. Here, we study the specificity of populations associated with four host-plants using mitochondrial and nuclear genetic markers, and we evaluate the evolution of host-shifts in H. obsoletus. Host-plant use was confirmed for Convolvulus arvensis, Urtica dioica, Vitex agnus-castus and Crepis foetida. Mitochondrial genetic analysis showed sympatric occurrence of three phylogenetic lineages that were ecologically delineated by host-plant preference, but were morphologically inseparable. Nuclear data supported the existence of three genetic groups (Evanno's Delta K(3) = 803.72) with average genetic membership probabilities  gt  90%. While populations associated with C. arvensis and U. dioica form a homogenous group, populations affiliated with V. agnus-castus and C. foetida constitute two independent plant-associated lineages. The geographical signal permeating the surveyed populations indicated complex diversification processes associated with host-plant selection and likely derived from post-glacial refugia in the eastern Mediterranean. This study provides evidence for cryptic species diversification within H. obsoletus sensu lato: i) consistent mitochondrial differentiation (1.1-1.5%) among host-associated populations in syntopy and in geographically distant areas, ii) nuclear genetic variance supporting mitochondrial data, and iii) average mitochondrial genetic distances among host-associated meta-populations are comparable to the most closely related, morphologically distinguishable species, i.e., Hyalesthes thracicus (2.1-3.3%).",
publisher = "Public Library of Science (PLoS)",
journal = "PlOS One",
title = "Widespread plant specialization in the polyphagous planthopper Hyalesthes obsoletus (Cixiidae), a major vector of stolbur phytoplasma: Evidence of cryptic speciation",
number = "5",
volume = "13",
doi = "10.1371/journal.pone.0196969"
}

Kosovac, A., Johannesen, J., Krstić, O., Mitrović, M., Cvrković, T., Toševski, I.,& Jović, J.. (2018). Widespread plant specialization in the polyphagous planthopper Hyalesthes obsoletus (Cixiidae), a major vector of stolbur phytoplasma: Evidence of cryptic speciation. in PlOS One
Public Library of Science (PLoS)., 13(5).
https://doi.org/10.1371/journal.pone.0196969

Kosovac A, Johannesen J, Krstić O, Mitrović M, Cvrković T, Toševski I, Jović J. Widespread plant specialization in the polyphagous planthopper Hyalesthes obsoletus (Cixiidae), a major vector of stolbur phytoplasma: Evidence of cryptic speciation. in PlOS One. 2018;13(5).
doi:10.1371/journal.pone.0196969 .

Kosovac, Andrea, Johannesen, Jes, Krstić, Oliver, Mitrović, Milana, Cvrković, Tatjana, Toševski, Ivo, Jović, Jelena, "Widespread plant specialization in the polyphagous planthopper Hyalesthes obsoletus (Cixiidae), a major vector of stolbur phytoplasma: Evidence of cryptic speciation" in PlOS One, 13, no. 5 (2018),
https://doi.org/10.1371/journal.pone.0196969 . .

TY  - JOUR
AU  - Atanasova, Biljana
AU  - Jakovljević, Miljana
AU  - Spasov, Dušan
AU  - Jović, Jelena
AU  - Mitrović, Milana
AU  - Toševski, Ivo
AU  - Cvrković, Tatjana
PY  - 2015
UR  - https://plantarum.izbis.bg.ac.rs/handle/123456789/383
AB  - Bois noir (BN), which is induced by 'Candidatus Phytoplasma solani' ('Ca. P. solani'), is an important grapevine yellows disease that causes severe damage in viticultural regions throughout the Euro-Mediterranean basin. An epidemiological survey to determine potential insect vectors and the primary reservoir plants of BN phytoplasma in Macedonian vineyards was undertaken between 2012 and 2013 in the southeastern part of the country. A study on the species diversity from the suborder Auchenorrhycha revealed the prevalence of the principal vector of 'Ca. P. solani', which is the planthopper Hyalesthes obsoletus. Reptalus panzeri, which is the second-most documented BN vector, was not recorded in Macedonian vineyards. Three leafhopper species, namely Psammotettix alienus, Artianus manderstjernii and Euscelis incisus, were also widespread in the BN-affected vineyards, but only H. obsoletus tested positive for 'Ca. P. solani'. Molecular characterizations were performed by the sequencing and/or RFLP typing of tuf, vmp1 and stamp genes, and the results were used to gain detailed insight into the molecular diversity of the 'Ca. P. solani' strains associated with grapevines, tentative reservoir plants (Urtica dioica and Convolvulus arvensis) and the H. obsoletus associated with these plants. Among the 91 'Ca. P. solani' strains detected in diverse plant and insect hosts, three tuf, five vmp1 and 11 distinct stamp genotypes were identified. Twelve comprehensive genotypes of 'Ca. P. solani' were detected according to the tuf/vmp1/stamp genotyping. The highest diversity of genotypes was detected among the strains from H. obsoletus individuals associated with U. dioica, of which the most frequent genotype was tuf-ab/V18/M1 (43 %). The tuf-b/V2-TA/STOL comprehensive genotype was found in 33 % of naturally infected grapevines. Two 'Ca. P. solani' genotypes were associated with U. dioica, namely (i) tuf-ab/V18/M1 (60 %) and tuf-a/V3/M4 (40 %), and only one genotype (tuf-b/V2-TA/Rqg50) was associated with C. arvensis.
PB  - Springer, Dordrecht
T2  - European Journal of Plant Pathology
T1  - The molecular epidemiology of bois noir grapevine yellows caused by 'Candidatus Phytoplasma solani' in the Republic of Macedonia
EP  - 770
IS  - 4
SP  - 759
VL  - 142
DO  - 10.1007/s10658-015-0649-0
ER  - 

@article{
author = "Atanasova, Biljana and Jakovljević, Miljana and Spasov, Dušan and Jović, Jelena and Mitrović, Milana and Toševski, Ivo and Cvrković, Tatjana",
year = "2015",
abstract = "Bois noir (BN), which is induced by 'Candidatus Phytoplasma solani' ('Ca. P. solani'), is an important grapevine yellows disease that causes severe damage in viticultural regions throughout the Euro-Mediterranean basin. An epidemiological survey to determine potential insect vectors and the primary reservoir plants of BN phytoplasma in Macedonian vineyards was undertaken between 2012 and 2013 in the southeastern part of the country. A study on the species diversity from the suborder Auchenorrhycha revealed the prevalence of the principal vector of 'Ca. P. solani', which is the planthopper Hyalesthes obsoletus. Reptalus panzeri, which is the second-most documented BN vector, was not recorded in Macedonian vineyards. Three leafhopper species, namely Psammotettix alienus, Artianus manderstjernii and Euscelis incisus, were also widespread in the BN-affected vineyards, but only H. obsoletus tested positive for 'Ca. P. solani'. Molecular characterizations were performed by the sequencing and/or RFLP typing of tuf, vmp1 and stamp genes, and the results were used to gain detailed insight into the molecular diversity of the 'Ca. P. solani' strains associated with grapevines, tentative reservoir plants (Urtica dioica and Convolvulus arvensis) and the H. obsoletus associated with these plants. Among the 91 'Ca. P. solani' strains detected in diverse plant and insect hosts, three tuf, five vmp1 and 11 distinct stamp genotypes were identified. Twelve comprehensive genotypes of 'Ca. P. solani' were detected according to the tuf/vmp1/stamp genotyping. The highest diversity of genotypes was detected among the strains from H. obsoletus individuals associated with U. dioica, of which the most frequent genotype was tuf-ab/V18/M1 (43 %). The tuf-b/V2-TA/STOL comprehensive genotype was found in 33 % of naturally infected grapevines. Two 'Ca. P. solani' genotypes were associated with U. dioica, namely (i) tuf-ab/V18/M1 (60 %) and tuf-a/V3/M4 (40 %), and only one genotype (tuf-b/V2-TA/Rqg50) was associated with C. arvensis.",
publisher = "Springer, Dordrecht",
journal = "European Journal of Plant Pathology",
title = "The molecular epidemiology of bois noir grapevine yellows caused by 'Candidatus Phytoplasma solani' in the Republic of Macedonia",
pages = "770-759",
number = "4",
volume = "142",
doi = "10.1007/s10658-015-0649-0"
}

Atanasova, B., Jakovljević, M., Spasov, D., Jović, J., Mitrović, M., Toševski, I.,& Cvrković, T.. (2015). The molecular epidemiology of bois noir grapevine yellows caused by 'Candidatus Phytoplasma solani' in the Republic of Macedonia. in European Journal of Plant Pathology
Springer, Dordrecht., 142(4), 759-770.
https://doi.org/10.1007/s10658-015-0649-0

Atanasova B, Jakovljević M, Spasov D, Jović J, Mitrović M, Toševski I, Cvrković T. The molecular epidemiology of bois noir grapevine yellows caused by 'Candidatus Phytoplasma solani' in the Republic of Macedonia. in European Journal of Plant Pathology. 2015;142(4):759-770.
doi:10.1007/s10658-015-0649-0 .

Atanasova, Biljana, Jakovljević, Miljana, Spasov, Dušan, Jović, Jelena, Mitrović, Milana, Toševski, Ivo, Cvrković, Tatjana, "The molecular epidemiology of bois noir grapevine yellows caused by 'Candidatus Phytoplasma solani' in the Republic of Macedonia" in European Journal of Plant Pathology, 142, no. 4 (2015):759-770,
https://doi.org/10.1007/s10658-015-0649-0 . .