Original scientific paper

Bacteria in the xylem of sugar-beet leaves attacked by Cercospora beticola Sacc.

Biljana Plavšić ; BiH
Živojin Erić ; BiH
Davor Miličić ; Hrvatska

Abstract

The fungus Cercospora beticola causes a large number of spots on the leaves of sugar-beet which considerably diminish the yield. In order to establish whether the apparently healthy leaf parts among the spots were altered, these leaf parts were investigated by means of electron microscope. The investigated places were from two to three nm away from the spot margins which were of a red brown colour. In the xylem of these parts numerous bacteria and some fungal hyphae were found. In the apparently healthy leaf parts which were 5 mm away from leaf spots, we could find neither bacteria nor fungi. Obviously the bacteria entered the healthy tissues through the spot but they could not spread very far from it.
This investigation was carried out in October 1978, that is at the end of the growing season of sugar-beet. It would be interesting to investigate whether bacteria appear in other stages of cultivation in order to ascertain their role on the decay of sugar-beet.

Keywords

Hrčak ID:

158343

URI

https://hrcak.srce.hr/158343

Publication date:

31.12.1979.

Article data in other languages: croatian

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