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2004, vol. 55, br. 1-4, str. 39-48
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Anatomsko-histološke karakteristike Leucostoma cincta parazita breskve
Anatomical and histological characteristics of Cytospora rubescens as peach pathogen
Univerzitet u Novom Sadu, Poljoprivredni fakultet, Departman za zaštitu bilja i životne sredine, Srbija
e-adresa: popovict@eunet.rs
Sažetak
U radu su prikazani rezultati istraživanja morfoloških odlika devet izolata Cytospora rubescens Sacc., anamorfa vrste Leucostoma cincta (Fr.) Höhn. Izolati su dobiveni sa obolelih jednogodišnjih i dvogodišnjih grana breskve sa simptoma sušenja iz voćnjaka na Fruškoj Gori. Proučavanja su obuhvatila praćenje prisustva reproduktivnih organa, morfologiju konidiomata na anatomskim presecima i utvrđivanje oblika i dimenzija pikniospora.
Abstract
Morphological characteristics of nine Cytospora rubescens (teleomorph Leucostoma cinctum) isolates obtained on PDA from infected peach branches at the Fruska Gora Mountain region were studied in vitro and in vivo. Pycnidia formation on PDA were 15-20 days after isolation, but sometimes after more than 30 days, and two months after inoculation on twigs and branches. Pycnidia are rounded, dark, 0.2-2 mm in diameter. The pycnidia formation varied from sporadic to abundant. The pycnidiospores are extruded in a form of orange to red droplets globules. They are one-celled, smooth, slightly curved with rounded ends, hyaline, 5,0 - (6,6) - 8,5 x 1,5 - (1,7) - 2,5 ìm in size. There are many locules variable in size and shape seen on vertical and horizontal sections of pycnidia. Individual locules are fusioned into a single central cavity and one ostiolum. Horizontal cuts of pycnidia also show that pycnidium is encircle with black line - conceptacle. In our investigations, teleomorph of this fungi was not found.
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