Euglena

SW_Perspective · Post by **SW_Perspective** » Wed Mar 04, 2015 11:37 am

I collected a sample from the bottom of a pond at about 2 feet depth. After putting a light on a corner of the petri dish overnight I found a green band of euglena. Most were in a round state, not moving. Occasionally, one would roll out and assume a more typical form. None were using their flagella for motion. They would use a peristaltic action and appeared to "crawl" across the field like an inch worm. I took many images and later noticed details in the nucleus of some of the round forms that suggested chromosomes. In trying to figure out what they were I read that chromosomes in some euglenas stay in a condensed form during interphase. You can see this in the third and fourth images below.

3.3x, SPlan 40xPL, Oblique

5x, SPlan 40xPL, Phase Contrast

5x, SPlan40xPL, Phase Contrast, 3 image stack

5x, SPlan40xPL, Phase Contrast

3.3x, A20xPL, Phase Contrast

3.3x, SPlan40xPL, Phase Contrast

arturoag75 · Post by **arturoag75** » Wed Mar 04, 2015 12:55 pm

Nice phase shots

Marek Mis · Post by **Marek Mis** » Wed Mar 04, 2015 2:43 pm

Very nice phase images !

Marek

Jacek · Post by **Jacek** » Thu Mar 05, 2015 12:56 pm

Very nice