perigonia) Male inflorescence, comprised of specialised leaves surrounding the antheridia
2: Typical morphological characteristics of Phytophthora capsici isolated from infected black pepper root: Chlamysdospore (a); torulose hyphae (b); lemon shape sporangium with long pedicel (c) and globose oogonia with paragynous antheridia
1) induce the release of sperm from antheridia
on nearby male gametophytes and subsequently attract the sperm to the eggs (1-4).
Gametophytes of both species are bisexual with antheridia
and archegonia on the same gametophyte (Fig.
The development of prothallia and antheridia
from the sex organs of Polypodium iridiodes.
Morphology of antheridia
: 0 = large, several irregular jacket cells; 1 = small, few regularly arranged jacket cells; 2 = without jacket.
AL: starch; ANT: antheridia
; B: bract; CC: coronula cells; CE: spiral cells; CES: sterile oosporangium cell; CI: cytoplasm; CL: chloroplasts; CN: nodal cell; CNV: circumvolutions; CP: pedicelar cell; CT: central oospora cell; GA: starch granule; INT: internodes; LL: free lamellae thylakoids; NOD: nodes; NUC: nucleus; OSF: oospora; OOS: oosporangium; POC: compound oosporangial wall; TI: thylakoids; V: vacuoles.
are produced in the middle region or in the margins of the prothallia (Fig.
The main difference between Callipteris and the other genera of Woodsiaceae was that the antheridia
dehiscence of Callipteris, occurs by an opercular cell and whereas some of Diplazium and other Woodsiaceae antheridia
dehiscence occurs by a lateral or apical pore.
The Oospores were mixed with an antheridia
suspension then the zygotes were swirled and allowed to settle.
Plerotic oospores with amphygenous antheridia
were observed in laboratory crosses (Erwin and Ribeiro, 1996).