Fucus is a genus of brown algae found in the intertidal zones of rocky seashores almost throughout the world.

Some species of Fucus, such as Fucus spiralis, are monoecious with both sexes occurring on one plant; most are dioecious with each sex being found on different plants. Some monoecious species may have both sexes in one conceptacle whilst others may have them in …

Nov 15, 2022 · There are no monoecious species of Fucus (e.g., one individual with receptacles containing conceptacles with either antheridia or oogonia). Fucus spp. exhibit a diplontic life cycle with male heterogamy (XX/XY) (Heesch et al., 2021) and gametes are the only haploid cells.

In the apices of the terminal branches, the gametangia develop in conceptacles implanted in receptacles. It's possible that they're monoecious or dioecious. These algae have a straightforward life cycle and only generate one type of thallus, which can reach a …

In monoecious species oogonia and antheridia develop inside the same conceptacle, whereas there are separate male and female in dioecious species (Brawley et al. 1999). Monoecious species of the family Fucaceae can self fertilize and are therefore also hermaphroditic. Oogonia (female gametangia) are formed in conceptacles of females.

Mar 31, 2023 · Fucus forms broad, dense canopies in the mid intertidal zone and can extend well into the high zone, with plants becoming smaller and less dense at the upper edge of its tidal range.

Family: Fucaceae: Perennial monoecious or dioecious plant body having hold­fast and flattened dichotomously branched fronds, provided with air vesicles; conceptacles terminal or sub-terminal; conceptacles opening outwards by a narrow ostiole; antheridia on branching filaments; eight oospheres; fertilization outside the conceptacles.

Details of sexual reproduction in Fucus spiralis are reported. Slimy oogonial packets form on the outside of the receptacles held in position by hairs extending from the ostiole. Spermatozoids enter the oogonium, and fertilization takes place before zygotes are disseminated by disintegration of oogo …

Hello Madalena, Fucus vesiculosus is dioecious. F. spiralis and F. serratus are monoecious. Dioecious and monoecious have nothing to do with macroscopic sexual dimorphism.

Rudimentary sieve-plates are present in Fucus. Growth in length of the thallus takes place by means of an apical cell which lies in the depression at the tip of each branch.