Early Stages of Infection of Lily Leaves by Botrytis elliptica and B. cinerea
Journal
植物病理學會刊
Journal Volume
12卷
Journal Issue
2期
Pages
103-108
Date Issued
2003
Author(s)
Ping-Fu Hou
Abstract
According to our observations, infection of lily leaves (Oriental hybrid cv. Star Gazer) by Botrytis elliptica resulted in the development of necrotic lesions, but inoculation with B. cinerea only caused tiny specks. A comparative study was conducted herein to investigate early stage of infection of 'Star Gazer' leaves by these pathogens. Microscopical examination 12 hr after inoculation showed that the percentage of germinated conidia of both B. elliptica and B. cinerea on the abaxial surfaces of lily leaves reached to 95%, but the number of appressoria produced by the germ tubes of B. elliptica was significantly higher than that produced by B. cinerea. In addition, the penetration of lily leaves by B. elliptica was nearly 54.5%, but it was nil by B. cinerea. During the attempted penetration by B. elliptica and B. cinerea, some of the epidermal cells at penetration sites became dead. Among these dead cells, some were associated with fluorescence. Although some of the penetration hyphae of B. elliptica were retarded by the dead cells of lily leaf epidermis, some still expanded and resulted in the development of necrotic lesion. Fluorescent depositions as indicated by aniline blue staining appeared in lily leaf tissues infected by B. elliptica. However, this phenomenon was not observed in lily leaves inoculated with B. cinerea.
Type
journal article
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