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.
The outstanding character of one sporophyte/one sporangium
per fertilization event has lead to thumbnailing these plants as "monosporangiates".
discharge in Pilobolus: a photographic study.
The last sporangium
has spores significantly smaller than the other two, and, interestingly, a mixture of spores from the UAE specimen (not taken from individual sporangia) had a bimodal size distribution, with some spores larger (~63 um), darker, and more strongly and evenly tetragonal than the others (which were ~49 um in diameter, more transparent, and irregularly shaped).
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.
Characteristic sporangia (s) containing zoospores (z) are visible in the epidermis (asterisk, superficial epidermis; arrow, septum within an empty sporangium
; bars, 10 [micro]m).
contains up to 20 endospores that are released on rupture.
wall whitish (unpigmented); megaspores with honeycomb-like ridges (reticulate); plant aquatic (submerged or emergent), usually not associated with rock outcrops I.
The PIBs are known to be coformed during sporulation within the sporangium
or spore-mother cell, but exact details concerning molecular and cellular events in their formation and maturation have not been obtained.
Then it produces a very distinctive capsule (sporangium
), as can be seen in the photo.
Therefore, to evaluate synchrony in spore release in Pterygophora, we measured weekly changes in sporangium
density during the reproductive seasons of 1991 and 1993.