Zygotes of the desmid algae Spirogyra

Images made through a microscope. All subject types.

Moderators: rjlittlefield, ChrisR, Chris S., Pau

Posts: 64
Joined: Wed Aug 16, 2006 12:07 pm

Zygotes of the desmid algae Spirogyra

Post by Bernd »


Vegetative cells (A) and zygotes (B) of a desmid algae of the genus Spirogyra found in a water sample which stood on the bench of my kitchen window for 7 weeks after being taken from a puddle.

(B): Cells from a single filament have undergone lateral as well as scalariform conjugation. Lateral conjugation occurs when adjacent cells of the same filament fuse. The content of the cell to the lower right migrated through the conjugation tube (arrow) into the upper left cell to form the zygote. Scalariform or ladder-like conjugation occurs when cells of different filaments fuse. For this type of conjugation the content of the upper cell migrated through the conjugation tube (asterisk) into the lower cell to form the zygote.

All photographs were taken with a Canon Powershot G5 camera through a Plan-Neofluar 40x/0,75 objective attached to a Zeiss Axioskop, using brightfield illumination. Width of the filaments is about 25 µm.


Ken Ramos
Posts: 7208
Joined: Thu Jul 27, 2006 2:12 pm
Location: lat=35.4005&lon=-81.9841

Post by Ken Ramos »

I had a Canon G5 at one time and my results were not near this good as I can remember. Nice shots. :D

Posts: 3578
Joined: Fri Aug 04, 2006 4:19 am
Location: Southern New Hampshire USA

Post by beetleman »

You did a great job of explaining what is going on Bernd. The pictures and text are very interesting.
Take Nothing but Pictures--Leave Nothing but Footprints.
Doug Breda

Walter Piorkowski
Posts: 693
Joined: Mon Aug 14, 2006 6:42 pm
Location: South Beloit, Ill

Post by Walter Piorkowski »

Bernd, very nice images and helpfull commentary. It adds to my learning experience.


Post Reply Previous topicNext topic