Transcript bryophytes
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 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 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 BRYOPHYTES – structure of a moss plant BRYOPHYTES - liverworts LAMELLAR • flat • bowed • grown firmly to the substrate FOLIATE • two rows of sessile leaves disposed on the stem in one plane BRYOPHYTES - liverworts BRYOPHYTES – life cycle BRYOPHYTES – life cycle 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 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 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 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…….. 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