triphylla for three reasons: first, the number of spores per sporangium
(64) indicate a normal sexual life cycle; second, we didn't see sign of apogamous sporophytes at any time after the emergence of the archegonia and until the end of the observational period; third, we have detected motile sperm with normal vitality.
Schneider (2004) questioned the identity of the Martinique material based on the presence of more than one sporangium
per whorl-branch and the elongated outer cortical cells, which, according to him, are not in agreement with the original description of C.
Mucor fragilis sporangium
with spores in the background; taken with Q Imaging digital microscopy and recorded through Image Pro Express.
The outstanding character of one sporophyte/one sporangium
per fertilization event has lead to thumbnailing these plants as "monosporangiates".
Sporangia were broadly ovoid or obpyriform, semipapillate, and persistent and formed in succession from a single sporangium
Pure cultures were obtained using single sporangium
transfers to plastic Petri dishes containing dung agar or synthetic hemin medium (SHM) (Levetin &Caroselli 1976).
Ontogeny of the sporangium
of Phlebodium (Polypodium) aureum.
were identified by their characteristic hyphae and sporangium
Twenty spores from a single sporangium
(64 spores per sporangium
) of one plant yielded an average size of 45.
The spores are oval and sub-terminal and usually swell to occupy the sporangium
Writing for advanced undergraduate and beginning graduate students of biology and botany, he covers the organography of stems, the root, and the leaf then traces development from sporangium
to seed and from sporophyll to flower.
As specialization took place, the blade narrowed to produce what is now the filament, and the sporangium
was left at the tip of the modified leaf.
Conidiospores are unprotected spores formed by mitosis at the tips of hyphae, and sporangiospores are spores produced within a sac called a sporangium
It is a structure of its own originating in the archegonium venter not as its own plant, in case of Ricciaceae not even asa sporangium
because the venter of the archegonium itself serves as the "angium" for the spores.
d, Electron micrograph of an empty sporangium
showing diagnostic septum (arrow) (bar, 2 [micro]m).