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BRYOPHYTES (Mosses )

BRYOPHYTES (Mosses ). Výukový materiál OR 03 - 82 Tvůrce: Mgr. Alena Výborná Tvůrce anglické verze: ThMgr. Ing. Jiří Foller Projekt: S anglickým jazykem do dalších předmětů Registrační číslo: CZ.1.07/1.1.36/03.0005 Tento projekt je spolufinancován ESF a SR ČR. BRYOPHYTES.

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BRYOPHYTES (Mosses )

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  1. BRYOPHYTES (Mosses) Výukový materiál OR 03 - 82 Tvůrce: Mgr. Alena Výborná Tvůrce anglické verze: ThMgr. Ing. Jiří Foller Projekt: S anglickým jazykem do dalších předmětů Registrační číslo: CZ.1.07/1.1.36/03.0005 Tento projekt je spolufinancován ESF a SR ČR

  2. BRYOPHYTES • the oldest land plants • they have been preserved to the present day • the oldest resembled today's liverworts • they do not have a conductive tissue • they do not grow up to great heights • absence of conducting and supporting tissues • they are divided on mosses and liverworts

  3. BRYOPHYTES – structure of a moss plant • small stalk • leaf • attaching threads (attached to a substrate, it leads partially nutrients and water) • after fertilization, bristle with a capsule is developing • the capsule is closed with a lid - spores

  4. BRYOPHYTES – structure of a moss plant

  5. BRYOPHYTES - liverworts • LAMELLAR • flat • bowed • grown firmly to the substrate • FOLIATE • two rows of sessile leaves disposed • on the stem in one plane

  6. BRYOPHYTES - liverworts

  7. BRYOPHYTES – life cycle

  8. BRYOPHYTES– life cycle

  9. BRYOPHYTES– life cycle • spore germinates in moist environment • from the spore is created richly branched protonema • from the protonema of moss plant • there are on it: • gametangia (egg cells) • female antheridia • humidity is important for fertilization • from the fertilized egg cell grows bristle and capsule

  10. BRYOPHYTES – occurrence • all over the Earth • part of communities of higher plants • they predominate in the northern areas • they colonize places inhospitable for higher plants

  11. BRYOPHYTES– importance • they quickly colonize the newly exposed soil • it prevents soil erosion • they are involved in the formation of humus • they keep water • they contribute to the maintenance of the landscape and higher humidity in the meadows and the woods • indicator of air pollution

  12. REVISION: • 1) What is the importance of bryophytes? • 2) Describe the picture. • 3) Where the mosses occur? • 4) Describe the metagenesis of bryophytes. • 5) Liverwort include……..

  13. Source of texts and pictures : • DOBRORUKA, Luděk J. Přírodopis pro 7. ročník základní školy. 1. vyd. Praha: Scientia, 1998, 152 s. ISBN 80-718-3134-4

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