LAB #12 - Marchantia polymorpha


Surface View:

A closer look at a pore.


This shows you what the bottom surface of the thallus looks like. Note a scale indicated with an arrow.


Thallus cross-section:


Cross-section through the lower side of the thallus showing a section through a scale and rhizoids in cross-section.


Rhizoids:

REPRODUCTIVE STRUCTURES:

Gemmae (Asexual Reproduction):

You can see the gemma cups (indicated with an arrow). These cups produce numerous small structures called gemmae which can grow into whole new plants.


Close-up of a gemma cup.

This is a longitudinal section through a gemma cup (arrows point to gemmae).


The two black arrows on the picture of gemma below indicate the growing points, from which new thalli will grow.


Antheridiophore:

Note the antheridiophore indicated with the pink arrow.


Thisis a look at the top of the antheridial disk.


This is a picture of the longitudinal section through an antheridiophore. The antheridia are immersed in the disk (top part).



Here is close-up of antheridia in a preparedslide.


Sperm!

Archegoniophore:

This is a young archegoniophore.


The longitudinal section through the top of the archegoniophore shows the archegonia (A), each with an egg or zygote within.


The zygote develops into a sporophyte. Here is a young sporophyte:


This longitudinal lection shows the sporophytes hanging down.


Here is what the archegoniophore look like after the spores have been released.


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