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2011, vol. 26, br. 1, str. 43-53
Plasmopara obducens - nova pretnja proizvodnji Impatiens Walleriana u Srbiji
aUniverzitet u Beogradu, Poljoprivredni fakultet
bInstitut za zaštitu bilja i životnu sredinu, Beograd

e-adresabranka.krstic@agrif.bg.ac.rs
Projekat:
Agrobiodiverzitet i korišćenje zemljišta u Srbiji: integrisana procena biodiverziteta ključnih grupa artropoda i biljnih patogena (MPNTR - 43001)

Sažetak
Tokom 2010. godine biljke Impatiens walleriana sa simptomima plamenjače sakupljene su u stakleniku u okolini Mionice, Kolubarski okrug. Učestalost oboljenja bila je izuzetno visoka, blizu 100%, a sušenje i propadanje zaraženih biljaka veoma brzo, što je dovelo do šteta većih od 90%. Bela prevlaka patogena koja se razvijala na naličju listova sastojala se od hijalinskih monopodijalno razgranatih sporangiofora sa tankim zidovima i brojnih, ovoidnih i hijalinskih sporangija. Vrhovi grana sporangiofora granali su se pod pravim uglom u odnosu na glavnu osu, bez vršnog zadebljanja. Testovi patogenosti uključili su inokulacije mladih biljaka I. walleriana prskanjem suspenzijom sporangija, a simptomi plamenjače razvili su se nakon 13-15 dana. Odsustvo definisanih pega na zaraženim listovima impatiensa i prisustvo pravih sporangiofora ukazalo je da je prouzrokovač P. obducens, što je dalje potvrđeno molekularnom identifikacijom. Primenom lančane reakcije polimeraze (polymerase chain reaction, PCR), pomoću prajmera NL1 i NL4, umnožen je kodirajući 5'-kraj DNA velike ribozomalne podjedinice (LSU rDNA). Amplifikovani produkt odabranog izolata 28-10 je sekvencioniran, a filogenetske analize pokazale su njegovo grupisanje sa ostalim izolatima P. obducens različitog porekla. Uzimajući u obzir da je ovim istraživanjima dokazano da je prouzrokovač plamenjače na Impatiens walleriana u Srbiji P. obducens, neophodno je preduzimanje odgovarajućih fitosanitarnih mera u cilju sprečavanja daljeg širenja patogena u našoj zemlji.
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O članku

jezik rada: srpski
vrsta rada: naučni članak
DOI: 10.2298/PIF1101043R
objavljen u SCIndeksu: 15.06.2011.
metod recenzije: dvostruko anoniman

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