Naslov
Effect of dynamic changes of vegetative compatibility types in Cryphonectria parasitica populations on biological control of chestnut blight in Croatia

Autori
Katanić, Zorana ; Ježić, Marin ; Krstin, Ljiljana ; Idžojtić, Marilena ; Ćurković-Perica, Mirna

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of Joint Meeting of 2nd International Conference on Plant Biology, 21st Symposium of the Serbian Plant Physiology Society and COST ACTION FA1106 QUALITYFRUIT Workshop / Uzelac, Branka - , 2015, 152-153

Skup
Joint Meeting of 2nd International Conference on Plant Biology, 21st Symposium of the Serbian Plant Physiology Society and COST ACTION FA1106 QUALITYFRUIT Workshop

Mjesto i datum
Petnica, Srbija, 17.07.2015. - 20.07.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
chestnut blight; Cryphonectria parasitica; vc type diversity; biological control

Sažetak
Chestnut blight, caused by ascomycete fungus Cryphonectria parasitica, is a dangerous disease responsible for the decline of chestnut forests. Fortunately, biological control of this disease is enabled by naturally occurring dsRNA virus, Cryphonectria hypovirus 1 (CHV1) that reduces virulence and reproductive capacity of the fungus, consequently causing healing of cankers and recovery of infected trees. Transmission of CHV1 occurs horizontally via hyphal anastomosis and vertically into conidia, but not into ascospores. However, horizontal transmission of CHV1 is limited by the vegetative (in)compatibility system of the fungal host. Research conducted over a period of ten years revealed qualitative and quantitative changes of the vegetative compatibility (vc) types of C. parasitica populations in Croatia. Formally dominant vc types are becoming less frequent over time, some vc types are no longer present, and same novel vc types emerged in the studied populations. This could be the result of sexual reproduction and/or migrations from adjacent areas and it could, at least partially, account for decrease in percentage of hypovirulent (virus-infected) fungal isolates detected in these populations. Due to these changes of C. parasitica populations in Croatia, naturally present virus-induced hypovirulence may not be sufficient for the protection of the chestnut forests and human-mediated biocontrol using carefully selected CHV1 isolates might become necessary.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Šumarstvo

POVEZANOST RADA