Funaria life cycle Class 11 Biology. Back to categories. Occurrence l The genus Funaria comprises species. In India, it is represented by 15 species. The following diagram gives one example of a bryophyte life cycle, that of the moss Funaria hygrometrica. click to enlarge · Print this diagram as. Funaria hygrometrica – life cycle. Gametophyte. Spores. Protonema. Sporophytes . See. SEP. A recently germinated spore with a rudimentary protonema. spore.
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Chloronemal stage is characterised by irregular branching, right angle colourless cross walls, and many evenly distributed discoid chloroplast. Within the capsule, spore-producing cells undergo meiosis to form haploid spores. A cross section through the upper portion of the young sporogonium shows a two identical segments Fig.
Funaria – Wikipedia
We think you have liked this presentation. Ljfe syngamy zygote develop into embryo holoblastic and exoscopic on gametophyte. Epibasal cell divides by two intersecting oblique walls. The inner ring of peristomial teeth do not show hygroscopic movement.
It consists two to three layers of loosely arranged chlorophyllous cells. These are called gemmae. Shaw Funaria riparia Lindb. These are primitive multicellular, autotrophicshade loving, amphibious plants.
Fertilization ends the gametophytic phase.
Diploid 2n cells arising from the zygote continue to divide to form a small sporophyte 2n. This is followed by the periclinal division in this layer. Antheridium has androcyte mther cell undergo mitosis and form antherozoids,and enter into archegoium by chemotactic movement through water. If you wish to download it, please recommend it to your friends in any social system.
Each archegonium has a stalk, flask-shaped venter and a neck.
Funaria euryloma Dixon Funaria eurystoma Mitt. The inner part of this layers is called the second ring Fig. Both apical cells cut out alternate segments and form the elongated filamentous structure of young sporogonium Fig. Lifr altiseta Herzog Broth. It is present inner runaria hypodermis. There are umbrella-shaped gametangiophores that are either male called antheridiophores; phore means to carry or female called archegoniophores. Funaria is a genus of approximately species of moss. Hence, Cross-fertilization takes place.
Auth with social network: It allows the dispersal of spores from the capsule in instalments.
Female branch develops as a lateral outgrowth from the base of the male branch and bears archegonia. Therefore, the sporophyte of Funaria is partially dependent on gametophyte. These are perinnating structures developed on rhizoids.
Life Cycle of Funaria: Sexual and Vegetative Life Cycle
Laminaria they show a clear differentiation, the architecture of the body, called thallus, is more primitive than in “higher plants”, like ferns, Gymnosperms and flowering plants. It functions as anchoring and absorbing organ. Gives structural support less affected by gravity.
Although like some algae see: The thin walled cells of the annulus break away, the operculum is thrown off and the peristome teeth are exposed. The axial cell divides, transversely to form an outer primary cover cell and inner central cell Fig. The oospore divides and redivides to form embryo.
According to Sirnoval cyc,e of protonema under laboratory conditions can be differentiated into two stages—chloronemal stage and caulonemal stage.