fern reproduction

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  • Reproduction In Ferns

  • FERNS

  • DIFFERENT EXAMPLES OF FERNS

  • Common Name:Black-Stick Maiden HairScientific Name:Adiantum tenerum

  • Common Name:Staghorn FernScientific Name:Platycerium coronarium

  • Common Name:Birds Nest FernScientific Name:Asplenium nidus

  • Common Name:Tree FernScientific Name:Cyathea spp.

  • Common Name:Fishtail FernScientific Name:Nephrolepis falcate formaFurcans

  • REPRODUCTION IN FERNSPresented By :Cristina Joy F. Reyes

  • FERNS S. N - Pteridophyta

  • What are Ferns???

  • Ferns are seedless, vascular plants. Two types of vascular tissue 1.Xylem is responsible for moving water and nutrients throughout the plant.2.Phloem is responsible for moving glucose throughout the plant. Ferns reproduce by an alternation of generations.

  • They have stems and leaves, like other vascular plants. Most ferns have what are called fiddleheads that expand into fronds, which are each delicately divided.Ferns are typically found in moist, forested areas.The leaves of ferns are called fronds and when they are young they are tightly coiled into a tight spiral. Ferns can be categorized based on their growth form such as tufted, creeping, climbing, perching and tree ferns.

  • Words To Remember

  • Alternation of Generation

  • SorusIt is the cluster of sporangia.

  • It is an enclosure in which spores are formed.Sporangium/Sporangia

  • Gametophyte (Prothallus)It is the haploid, multicellular phase of plants and algae that undergoalternation of generations, with each of its cells containing only a single set of chromosomes.

  • SporophyteIt is the diploid form of plants that have alternation of generations. It develops from a zygote and produces asexual spores.

  • AntheridiumIt is ahaploidstructure or organ producing and containing malegametes called sperm.

  • ArchegoniumIt is a multicellular structure or organ of the gametophyte phase of certainplants, producing and containing the ovumor female gamete.

  • AdultSporophyte ....1) Sporophyte creates and releases haploid sporesground

  • ....ground2) Haploid spores land in the soil

  • ground3) From the haploid spores, gametophyte grows in the soilLets zoom inFern gametophytes are called a prothallus

  • 4) Sperm swim through water from the male parts (antheridium) to the female parts (archegonia)zygote createdLets zoom back outeggeggeggzygotezygotezygote

  • ground5) Diploid sporophyte grows from the zygotesporophyteFern gametophytes are called a prothallus

  • 6) Fiddle head uncurls.fronds open upground7) Cycle repeats -- Haploid spores created and released....fiddleheadfrond

  • ....ground2) Haploid spores land in the soil

  • ground3) From the haploid spores, gametophyte (called the prothallus) grows in the soilLets zoom in

  • 4) Sperm swim through water from the male antheridium to the female archegoniaLets zoom back outeggeggeggzygotezygotezygote

  • ground5) Diploid sporophyte grows from the zygotesporophytefiddlehead

  • 6) Fiddlehead uncurls.fronds open up.ground7) Cycle repeats....

  • Did You Know?Ferns are very ancient group of plants. They are supposed to be older than land animals and even dinosaurs. They were actually growing on Earth for 2 hundred million years.

  • Summary- Ferns are seedless, vascular plants. - They have stems and leaves, like other vascular plants. - Most ferns have what are called fiddleheads that expand into fronds, which are each delicately divided.- Ferns are typically found in moist, forested areas.- The leaves of ferns are called fronds and when they are young they are tightly coiled into a tight spiral. Ferns Reproduction1.Most ferns are homosporous , meaning that they produce a single type of spore.2.The ferns spore develops into a small, heart shaped gametophyte that sustain itself by photosynthesis.

  • 3.Each gametophyte has both male and female sex organs but the archegonia and antheridia usually mature at different times , ensuring cross fertilization between gametophytes4.Fern sperm like those of all seedless vascular plants use flagella to swim through moisture from antheridia to eggs in the archegonia and then fertilize the eggs.5.A fertilized egg develops into a new sporophyte , and the young plant grows out from an archegonium of its parent, the gametophyte6.The spots on the underside of reproductive leaves (sporophylls) are called sori7.Sporangia release spores, which give rise to gametophytes.

  • ANY QUESTIONS , CLARIFICATIONS COMMENTS ??????????

  • References:http://w2science.swiiit.com/cos/o.x?c=/wbn/pagetree&func=view&rid=55914

    http://eresources.nlb.gov.sg/infopedia/articles/SIP_389_2005-01-28.html

    http://en.wikipedia.org/wiki/Platycerium_coronarium

    http://en.wikipedia.org/wiki/Fernhttp://www.slideshare.net/alyssadenise/life-cycle-of-fern

    https://smartsite.ucdavis.edu/access/content/user/00002950/bis10v/media/ch15/fern_life_cycle_v2.html

    Infoplease.comhttp://www.infoplease.com/dk/science/encyclopedia/seedless-plants.html#ixzz39Lb7WxTa

    http://www.infoplease.com/encyclopedia/science/fern-reproduction.html#ixzz39LYtHu00