Bryophytes Making the transition from water to land.

BryophytesBryophytes

Making the transitionMaking the transition

from water to landfrom water to land

Adapting to life on land…Adapting to life on land…

• Some structures to prevent water loss Some structures to prevent water loss

• Thin bodies absorb waterThin bodies absorb water

• Short bodies (transport water cell to cell)Short bodies (transport water cell to cell)

• Leaf and root like structuresLeaf and root like structures

Algae and Plants share…Algae and Plants share…

• Chloroplast & get energy from the sunChloroplast & get energy from the sun

• Cell-wall material (cellulose)Cell-wall material (cellulose)

• Energy storage molecule (starch)Energy storage molecule (starch)

• Eukaryotic & multi-cellularEukaryotic & multi-cellular

Besides those traits, all plants…Besides those traits, all plants…

• Have alternation of generationsHave alternation of generations– Haploid fuse sex cells to become diploidHaploid fuse sex cells to become diploid– Diploid undergo meiosis to become haploidDiploid undergo meiosis to become haploid

• Haploid and diploid generations have very Haploid and diploid generations have very different shapesdifferent shapes

Bryophyte: Pseudo RootsBryophyte: Pseudo Roots

(Liverwort)


http://oregonstate.edu/dept/nursery-weeds/weedspeciespage/liverwort/rhizoids_4_750.jpg

Bryophyte: Pseudo LeavesBryophyte: Pseudo Leaves

Bryophyte: Stomata (pores)Bryophyte: Stomata (pores)

Bryophyte: CuticlesBryophyte: Cuticles

Gametophyte (main plant body, “leaves”), haploid

Rhizoids, haploid

Bryophyte AnatomyBryophyte Anatomy

http://dev.biologists.org/cgi/content/full/130/20/4835

Gametophyte makes gametes (sperm and eggs), haploid

Sperm have tails to swim in the moisture on the plant to another nearby plant in order to fertilize the egg.




Sperm

Sperm being released

Eggs for sperm to fertilize

Fertilized eggs (diploid) grow into a sporophyte

The sporophyte (diploid) grows up from the top of the gametophyte (haploid)



The sporophyte (diploid) is made up of a stalk and capsule…

The sporophyte (diploid) goes through meiosis and released spores (haploid) from the capsule.

http://www.botany.ubc.ca/bryophyte/pictures/pictureindex5.html


The spore (haploid) grows into a gametophyte

(haploid)



Gametophyte (Haploid)

Sporophyte (Diploid)

Rhizoid

Gametophyte (body with “leaves”)

Stalk (Seta)

Capsule

Bryophyte Life CycleBryophyte Life Cycle

Bryophyte: Moss SpeciesBryophyte: Moss Species

Bryophyte: Liverwort SpeciesBryophyte: Liverwort Species

Bryophyte: Hornwort SpeciesBryophyte: Hornwort Species

Bryophyte: Native Species Bryophyte: Native Species (Dead! No winter rains!)(Dead! No winter rains!)

Bryophyte: Native SpeciesBryophyte: Native Species(Dead and not quite dead!)(Dead and not quite dead!)

Bryophyte: Native SpeciesBryophyte: Native Species(Still alive!)(Still alive!)

Bryophyte: Native SpeciesBryophyte: Native Species(After pouring water on it…)(After pouring water on it…)

Blurry footage of moss reviving: Part 1

Blurry footage of moss reviving: Part 2

I’m so happy it’s alive!I’m so happy it’s alive!

Mushroom growing with liverworts and mosses. Super cute!

Bryophytes Making the transition from water to land.

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