Hornwort

Biology Iaguilar.chua.cortez.

Kingdom: Plantae

Division: Anthocerotophyta

Class: Anthocerotopsida

Order: Anthocerotales

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Also known as Non-Vascular plants Terrestrial with some aquatic forms Very small Photosynthetic Lack specialized cells for the transport of

materials

Bryophytes

<- Moss

Liverwort ->

Spaces between cells filled with mucilage – Distinguishing characteristic.

Single, large chloroplast – Photosynthesis (chl a, b, carotenoids, xanthophylls).

Rhizoids – Hairlike structure; for anchorage. Stomata – Exchange gases between plant

and air.

Structure of Hornwort

Damp and humid places. Rocky environment. Forests, fields, ponds, streams and

riverbanks. Tree trunks.

Habitat

Asexual or vegetative. Sexual.

Male – Antheridium; Female – Archegonium Both are embedded in the thallus. Antherida breaks down. Sperm are chemically attracted to eggs. Zygotes are scattered over the plant. Grow into the next generation of sporophytes. As they mature, they split into two halves lengthwise and

release spores. Hornwort germinates directly from the spores. Produce a flat thalloid plant with greasy blue-green color,

which is the next generation of gametophyte.

Reproduction

Aquarium plants (filter; absorbs chemicals). Nitrogen fixation. Astringent.

Ecology

Examples of species

<- Anthoceros formosae

Ceratophyllum demersum ->

<- Phaeoceros carolinianus

Megaceros flagellaris->

http://www.peoi.org/Courses/Coursesen/bot/temp/bot16t75.html http://creationwiki.org/Hornwort http://en.wikipedia.org/wiki/Hornwort http://www.youtube.com/watch?v=_iXoeUEYy3E http://images.google.com http://images.yahoo.com http://lifeofplant.blogspot.com/2011/03/hornworts.html http://hiddenforest.co.nz/bryophytes/hornworts/intro.htm http://science.jrank.org/pages/1049/Bryophyte-Hornworts-division-

Anthocerophyta.html http://www.ehow.co.uk/info_8715509_benefits-hornwort-aquarium.html http://bryophytes.plant.siu.edu/index.html

Sources