Atlas de biologie végétale
Conceptacles mâles de Fucus Les organes sexuels mâles du Fucus vésiculeux ... conceptacle s'ouvre à l'extérieur par un ostiole (photo A ...
Algo2 Phaeophycées
La reproduction ex. Fucus vesiculosus. Réceptacle. Conceptacle femelle. Conceptacle mâle ou. Ostiole. Coupes transversales dans le
La reproduction sexuée chez les plantes sans fleurs - Introduction
Conceptacle femelle. Fig 2. Ostiole. Conceptacles femelles. Fig 1. Document 5 : Formation des gamètes mâles du fucus. La figure suivante montre les étapes
The Development of the Conceptacle in Fucus
organs in a conceptacle or like the male organs themselves. She considers this condition a proof that hairpits are derived from the conceptacle (p. I74). The
CORRECTION (La reproduction sexuée chez les plantes sans fleurs
b) Le fucus est une espèce dioïque (les organes mâles et femelles sont portés par Figure 1= Conceptacles mâles ; Figure 2= Conceptacles femelle.
Increase of Fucus vesiculosus fertilization success: testing of
Female conceptacles contain eggs and male conceptacles contain sperm. After gender identification receptacles were carefully washed in seawater and cut off.
Cycle cellulaire et polarisation du zygote Fucus régulations et
11 févr. 2015 Figure 1 : Cycle de vie de Fucus vesiculosus sporophyte poil oogone paraphyse anthérocyste gamète. (anthérozoïde) pronucleus conceptacle.
The Development of the Conceptacle in Fucus
and of Fucus vesiculosus L. of which he had also mature tips containing ripe conceptacles. In addition
REPRODUCTION IN THE GENUS FUCUS
diploid gametophyte (van den Hoek et al. 1995). Fig. 1 Life cycle of Fucus vesiculosus. (a) Male gametophyte; (b) Female gametophyte; (c) Female conceptacle.
Reproductive Ecology of Fucus vesiculosus Northeast Algal Society
(male gametes are orange inside the conceptacles; female gametes are olive green inside conceptacles). Fucus vesiculosus is reproductive around new.
Searches related to conceptacle male fucus PDF
(a) Male gametophyte; (b) Female gametophyte; (c) Female conceptacle with oogonia; (d-h) Development of the oogonia and release of the egg cells; (i) Filaments bearing antheridia which develop from the walls of male conceptacles; (j) Release of spermatozoids from an antheridium; (k) Spermatozoids; (l) Fertilization of egg cells
What is a conceptacle in Fucus?
Conceptacle in Fucus is a flask-shaped cavity, which contains reproductive organs. Generally, several conceptacles are located in the receptacle, which is a thick stem at the end of the branches. The size of a conceptacle is around 40–150 ?m in diameter.
What are the bumps in a Fucus receptacle?
The bumps are conceptacles, chambers that house the male and female gametangia. View prepared slides of a cross section through a Fucus receptacle to view inside the conceptacles. The male and female gametangia are housed within the conceptacle chamber. The antheridia are branched structures that look like small trees.
How does Fucus reproduce?
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. The only method of asexual reproduction in Fucus is by fragmentation. The method of sexual reproduction is heterogamous. The gametes are borne in oogonia and antheridia, which are produced in the conceptacles.
What are the characteristics of Fucus?
Characterised by its discoid shaped chloroplasts and intercalary sporangia appearing as swollen cells within th e filaments throughout the plant. Found growing within mixed mats on open hard or soft subst rates and epiphytically on Fucus or other l arge algae.
