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ULTRASTRUCTURE OF CONIDIOGENESIS IN SPHAEROSTILBE OCHRACEA
Author(s) -
Glover Sue U.,
Hanlin Richard T.
Publication year - 1981
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1981.tb12401.x
Subject(s) - conidium , hypha , biology , apex (geometry) , ultrastructure , botany
Conidium development in Sphaerostilbe ochracea is phialogenous. Mature synnemata are cup‐shaped at the apex. The hyphal tips inside the apex are cut off by a septum to form elongated phialides that initially are not distinguishable from other hyphae. Numerous small vesicles aggregate in the tips of the incipient phialides, after which a second wall layer is deposited inside the original wall of the young phialides. As the conidium forms, the outer wall layer breaks, leaving a minute collarette at the apex of the phialide. Some wall material adheres to the first conidium as it matures. Subsequent conidia push out of the mouth of the phialide; as they do so they separate and are held together in a mucoid droplet. Conidia are one‐celled when formed but soon become two‐celled through formation of a median septum.