Pectobacterium carotovorum subsp. carotovorum – the Causal Agent of Calla Soft Rot in Serbia and Montenegro
Pectobacterium carotovorum subsp. carotovorum – prouzrokovač vlažne truleži biljaka kale u Srbiji i Crnoj Gori
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Author
Ivanovic, Milan
Gasic, Katarina
Gavrilovic, Veljko
Obradovic, Aleksa
Keywords
CallaPectobacterium carotovorum subsp. carotovorum
Stem and root rot
Bacteriological characteristics
Kala
trulež stabla i korena
bakteriološke karakteristike
Metadata
Show full item recordAbstract
Bacterial strains were isolated from above- and underground parts of diseased calla
plants originating from different localities in Serbia and one locality in Montenegro. They
were characterized by studying their pathogenic, cultural, biochemical and physiological
characteristics. All investigated strains caused soft rot of calla leaf stalks, potato slices and
aloe leaves, and induced hypersensitive reaction on tobacco. Bacteriological properties of
the strains indicated that symptoms on calla plants were caused by Gram-negative, nonfluorescent,
oxidase negative, catalase positive and facultatively anaerobic bacterium belonging
to the genus Pectobacterium. The investigated strains grew at 37ºC and in 5% NaCl, utilised
lactose and trechalose, and produced neither indol nor lecitinase. These results, as
well as the characteristic growth on Logan’s differential medium indicated that soft rot of
tuber and stem base of calla plants was caused by Pectobacterium carotovorum subsp. carotovorum.
This is the first report of this pathogen affecting calla plants in Serbia. Proučene su patogene, odgajivačke i biohemijsko-fiziološke odlike sojeva izolovanih
iz nadzemnih i podzemnih delova obolelih biljaka kale gajene u različitim lokalitetima u
Srbiji i jednom lokalitetu u Crnoj Gori. Svi proučavani sojevi ispoljili su izraženu pektolitičku
aktivnost prouzrokujući vlažnu trulež lisnih drški kale, kriški krompira, liski aloje ili sanseverije,
a prouzrokovali su i hipersenzitivnu reakciju duvana. Proučavanjem bakterioloških
karakteristika utvrđeno je da promene na biljkama kale prouzrokuju Gram-negativni, nefluorescentni,
oksidaza-negativni, katalaza-pozitivni i fakultativno-anaerobni sojevi bakterije,
koja prema navedenim karakteristikama pripada rodu Pectobacterium. Proučavani sojevi
se razvijaju pri 37ºC i u prisustvu 5% NaCl, razlažu laktozu i trehalozu, ne stvaraju indol i
lecitinazu. Navedeni rezultati, kao i karakterističan razvoj na Loganovoj diferencijalnoj podlozi
ukazuju da je vlažnu trulež korena i prizemnog dela biljaka kale prouzrokovala bakterija
Pectobacterium carotovorum subsp. carotovorum. Ovo je prvo saopštenje o pojavi P. c. ssp.
carotovorum kao patogena kale u Srbiji.