HORNWORTS LIVERWORTS MOSSES - · PDF fileBryopsida. 9 gam spor Sphagnopsida. 10 spor gam...

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Transcript of HORNWORTS LIVERWORTS MOSSES - · PDF fileBryopsida. 9 gam spor Sphagnopsida. 10 spor gam...

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INTRODUCTION TO BRYOPHYTES

Joannes A. Janssens HORNWORTS LIVERWORTS MOSSES

2HORNWORTS

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LIVERWORTS

4MOSSES

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STREPTOPHYTE EVOLUTIONorigin of embryophytes

(Charophyceae)

Anthocerotophyta

Polysporangiophyta

Bryophyta

Marchantiophyta

flavonoidsloss of pyrenoid

jacketsmulticellular sporophyte

calyptraestalked gametangia

loss of columella and stomataseta reduction

vascular tissuebranched sporophyteisomorphic phasesstoma

?

?

?

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The Life Cycle of Bryophytes bryophytes are diplohaplontic plants with

a heteromorphic alternation of generations

within the sporangium spores are formed by meiosis

protonema and gametophores develop after germination

antheridia and archegonia produce spermand eggs

after fertilization a new, attached sporophyte is formed

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spor

gam

Anthocerotopsida

sporspor

gam gam

Bryopsida

9

gam

sporSphagnopsida

10

spor

gamJungermanniopsida

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gam

sporMarchantiopsida

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spores

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caulonema

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protonema

and

sporeling

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antheridia

16archegonia

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young sporophyte

18sporophytes

stem

leaf

rhizoids

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lamina

margin, border

apiculus

decurrentleaf bases

costa

basic moss leaf

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The End

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