Competitive Exams: Revision Terminology Part 27

  • Man’s intestine – E. Coli – synthesis of V it B bk.

  • Genetic engineering – Escherichia & agrobacterium

  • Selaginella bryopteris = Sanjeevani

  • Pteridophytes – vas cular cryptograms, absence of overle, highly organized sporophyte generation, sporophyte is independent of gametophyte.

  • Pteridophytes simple, uninerved leaves = microphyllous, Cambium is absent.

  • Xylem made of tracheids only & phloem consists of sieve tube only.

  • Azolla = Biofertilizer – water fern

  • Phymia – fossil plants

  • Psilophytales – 1st land vascular plants

  • Salvinia – Aquatic pteridophyte weed.

  • Cyathea & Alsophila – tree fern

  • Protostele – lycopodium, Selagiwella.

  • Alsophila – pteris, Dryptoresis

  • Siphonostele – equiseturm.

  • Heterosporous – selaginella – endosperic diecious.

  • Homosporous – equisetum, lycopodieam, Fteris – exosporic, monoccious

  • Eusporangiate – from superficial cell – lycopodium, selaginella, equiseturn

  • Lepto Eusporangiate – from single initial cell – pteric, Marselia.

  • Sex organ embedded in prothallus – antheridium, uninucleate, biflogellate archegonium – neck & venter

  • Fertilization – H2O essential, chemotactic

  • Gametophyte from sporophyte without meiosis & spore formation – apospery.

  • Sporophyte from gametaphyte without gametes & sexual fusion – Apogamy.

    Understanding the various ferns, mosses and species
    Knowing various ferns, mosses and species in one table

    Club moss

    Horse tail

    Ferns

    (Glycoside)

    (spenopsida)

    (pteropsida)

    Microphyllous

    Homosporous

    Macrophyllous(frond)

    Hemo + Hetero

    Homosprous

    Homospoeous

    Sporangiain strobili(cone)

    Sporangiophore

    Clusters (sori)

    True mosses

    Hollow, jointed stem

    Rhizome with green leaves

    In air

  • Selaginella – resurrection plant, sporophyte, dichotomously branched, positive geotrop rhizophore develop exogenously polystele of protostele type, trabucuae.

  • Show casparian strips (endodermal), monoarch with exarch xylen, phloem is horse shoe shaped, 2 layered jacket of micros porangillen.

  • Megasporangiun – 4 layered structure with 2 layered jacket.

  • 13 celled – one prothallial cell + 12 antheridium (8 jacket cell + 4 archagonial cell)

  • Oval biflagellate anthrezoid, multicellular female gametophyte, vivipary is seen

  • Number of cotyledons = 2, meiosis in young sporangia, air space instele due to differential growth rate of outer cortical & inner vascular tissues.

  • If development of Rhizopores permanently suppoerssed – root not produced & water absorption adversely affected.

  • Ferns – damp shady places, Tropical rain, pinnatily compound lead, rachis present, fronds present

  • e – shaped stele

  • Dry brown Scales remote, Leaves uncoiled Like water spring – Circinate furcate (branch dichotomously). Ferns survive forest fires.

  • Adiantum – vegetable reproduce each sorus covered by indusium (Haploid spores)

  • Siphonostele – Stele with pith.

  • Protostele – Xylen, phloem, pericycle, endodermis & no pith.

  • Ferm – sporangrin consists of multicellular stalk & biconvex capsule.

  • One layered wall & capsule is thin called anmulus (thickening of inner & radial walls)

  • Thin walled region called stomium(mouth) (spore mature, cell of annulus dry & bends back with jerk).

  • Prothallus – haploid, unicellular rhizoids

  • Prothallus – antheridium - spirally coiled, multiflagellate.

  • Prothallus – archegonium – flask shaped – venter & Acek canal cells. Venter in prothallus & contain single large egg. Cell with female gamete in it.

  • Speres force fern to grown on wet places.

  • Speres grown into photosynthesis pothallus which even susceptible to dessication than bryophyte gametophyte.

  • Bryophytes – vascular tissue absent absent, gametophyte is dominate mosses gametes within multicellular sex organs called as sterile jackets ciliated anthrezcids for used during fertilization (needed water).

  • Amphitaians of plants kingdom srkashyap – father of Bryology in India western Himalayas – gold mines of liverworts

  • Western Himalayas – gold mines of liverwords