1 / 11

Spirogyra

Spirogyra. Some basics…. Many people call this “pond scum” Filamentous green alga (unbranched & varies in length) Phylum Chlorophyta Jelly-like covering surrounds & protects filaments from injury Each cell contains 1-2 ribbon-like chloroplasts (spiral in shape)

tacita
Télécharger la présentation

Spirogyra

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Spirogyra

  2. Some basics…. • Many people call this “pond scum” • Filamentous green alga (unbranched & varies in length) • Phylum Chlorophyta • Jelly-like covering surrounds & protects filaments from injury • Each cell contains 1-2 ribbon-like chloroplasts (spiral in shape) • Small dark bodies called pyrenoids found on chloroplasts (store starch) • Sexual reproduction via conjugation (fusion or union of 2 gametes)

  3. nucleus cytoplasm pyrenoid chloroplast cell wall sheath

  4. Can you pick out any of the structures from the last slide?

  5. 1 2 3 4 Single filament Migrating protoplast 2 filaments align & conjugation tubes form Zygotes form Conjugation in Spirogyra can be found on pg. 354 of your text!

  6. pyrenoids chloroplasts conjugation tubes

  7. Direction of Movement Active cell Passive cell

  8. Zygospore The cell walls of the original filaments decay & release the zygospores. After a period of rest, & when favorable conditions return, this zygospore will give rise to a new filament.

  9. Talk about…..Spirogyra

More Related