Abstract
The paper presents the results of studies of spread and impact of Phytoplasma on the growth of buckwheat plants. Electron microscopic studies of Phytoplasma were conducted. The images of Phytoplasma established the possibility of a mixed infection, allowing further conduct targeted research and development of methods to combat this pathogen.
Highlights
Plant mycoplasmal diseases are widespread in the world
– mycoplasma – in ultrathin sections of aster plant phloem, diseased with chlorosis. Those new plant pathogens were named mycoplasma-like organisms and classified as Mollicutes, i.e. bacteria without cell wall
Buckwheat mycoplasmosis harmfulness was determined by comparing the elements of morphobiometric performance of diseased and healthy plants
Summary
A number of Phytoplasmas are known which belong to more than 30 groups and are pathogens for diseases that affect more than 200 plant species. – mycoplasma – in ultrathin sections of aster plant phloem, diseased with chlorosis Those new plant pathogens were named mycoplasma-like organisms and classified as Mollicutes, i.e. bacteria without cell wall. In the early 90-ies, based on phylogenetic analysis of DNA sequences of those organisms it was shown that they are a great monophyletic (i.e. derived from one ancestor) group within Mollicutes class and the name “phytoplasma” was suggested for them. The first 20 Candidates species were attributed to this genus on the basis that the identity of the DNA nucleotide sequence of 16S rRNA gene was at least 97.5% [3]
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