(n.) The exterior opening of a stomate. See Stomate.
(n.) Any small orifice.
Example Sentences:
(1) The isolate resembles M. cannonballus in the type of ostiole developed but M. eutypoides in having mainly two-spored asci.
(2) The cyst was typical of the genus, but differed from those of other species by its smaller size and the presence of numerous ostioles.
(3) Cells comprising the ostiolate neck may arise as modifications of spindle-shaped cells of the inner zone of the perithecial envelope.
(4) The two layers are normally separated by a space except where they form opercula in the center of ostioles (exits for excysting amebae).
(5) It differs from M. eutypoides in having a reduced ostiole but this may be a response to growth in culture as this species has only previously been reported from infected tissues.
(6) At irregular intervals in the cyst wall ostioles occupied by opercula are present.
(7) Two ascospores were photographed during emergence from an ostiole, but ostioles were found more frequently closed than open.
(8) Tissue contained septale filaments of two types, conidia, ostiolate perithecia containing ascospores corresponding to Microascus cinereus which was identified by culture.
(9) At high magnification, (using a scanning electron microscope), the crater-form punctuations adorning the sporangium were seen to result from openings (ostioles) of the network of small canals that traverse the external wall.
(10) nov. is described as a heterothallic, thermophilic fungus with spherical, black, non-ostiolate cleistothecia; elliposidal evanescent asci which contain eight one-celled ellipsoidal ascospores, darkening to deep brown to black, with one germ pore.
Perithecium
Definition:
(n.) An organ in certain fungi and lichens, surrounding and enveloping the masses of fructification.
Example Sentences:
(1) The surface and cavity of the perithecium of Ceratocystic stenoceras were studied with a scanning electron microscope.
(2) One segment encodes a perithecium maturation function that is dependent on the second segment for phenotypic expression.
(3) Any individual perithecium contained ascospores of only one extranuclear genotype.
(4) This polypeptide appears to be responsible for vegetative incompatibility, mating identity, and perithecium induction.
(5) The four viable (SkK) and four aborted (SkS) ascospores of each ascus are ejected from the perithecium as a physically disordered group.
(6) Physical wounding of the colony carried out shortly before or during the time perithecia were developing around the plate edge stimulated perithecium development in the wound area.
(7) The trenches were made at several different positions between the plate center and edge using cultures of several different ages, and the resultant distribution of perithecia along the trench edges suggested that the colony center and periphery produce diffusible inhibitors of perithecium development.
(8) These inhibitors may be responsible, in part, for the observed pattern of perithecium development in the colony.