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Histopathology of Albugo tragopogonis on stems and petioles of sunflower

Canadian Journal of Botany 77(1): 175-178

Histopathology of Albugo tragopogonis on stems and petioles of sunflower

Stem lesions in sunflower caused by Albugo tragopogonis developed individually from primary infections and did not result from a systemic infection. Cell division and callose formation were not observed, but weak lignin deposition occurred in infected tissues. Hyphae occurred intercellularly in stems in the cortex, cambium, vascular rays and pith. In petioles parenchymatous tissue was heavily colonized in contrast to lightly colonized collenchymatous hypodermis.

Accession: 003161249

DOI: 10.1139/b99-016

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