Cytopathological evidence for transport of phytoplasma in infected plants

摘要

Pleomorphic phytoplasmas were observed in sieve tubes, companion cells and in phloem parenchyma of Tagetes patula L. Helichrysum bracteatum Willd. And Gladiolus sp. L. plants with morphological changes typical for phytoplasma infec- Tion. In the pores of the sieve plate phytoplasma cells were seen which suggests that the vertical transport of this pathogen goes In the sieve tubes of infected plants throughout the sieve tube pores.