Names of different macroalgae parts

Randy Holmes-Farley · 01/27/2003, 10:37 AM

Bill or any other macroalgae experts:

What are the appropriate terms for the different parts of a macroalgae?

Specifically for Caulerpa racemosa, the growing tip is called what? The "grapes" are what? The root-like parts are?

Habib · 01/27/2003, 12:26 PM

Randy,

Chemical Abstracts don't have pictures huh?

C. racemosa: An algae with long stolons; its racemous-rhizoids point downward. Photosynthesis occurs in the clustered aggregations that, opposing the rhizoids, merely reach a few cm in height. Growth patten of phtotosynthetic thalli can vary from biforcated with tiny branches to entirely rounded bubbles. C.racemosa is one of the few species which originated from the Red Sea

Above and more can be found :

http://www.sbg.ac.at/ipk/avstudio/pi...t/caulerpa.htm

I hope that is of some help so far.

Randy Holmes-Farley · 01/27/2003, 12:46 PM

Thanks, Habib. That does help a lot.

Photosynthesis occurs in the clustered aggregations that, opposing the rhizoids, merely reach a few cm in height.

Unfortunately, it also raises an ugly question for me.

I was planning on running my Caulerpa/iodide experiment on simple, 4-6" lengths of stolon, with no thalli. I figured it would introduce too much variability to use thalli too since different thalli are very different sizes.

But if the stolon is not phososynthetic, then those lengths won't grow at all. Of course, they are green, so maybe they do photosyntehsize in addition to the thalli.

Habib · 01/27/2003, 02:23 PM

Randy,

Here is an interesting article dealing with nutrient limitation (not iodide) and growth of various Caulerpa.

There is also a section about sample preparation (materials and methods) and includes C. racemosa.

http://www.botany.hawaii.edu/Bot482/...Mar%20Biol.pdf

Randy Holmes-Farley · 01/27/2003, 02:38 PM

Thanks again, Habib.

They used the thalli but I'd like to do the experiment on a smaller scale (maybe stolons only, or stolons plus 1 thalli set). Anyway, much of the info is useful. The preconditioning, for example, which is something that I intended to do after cutting, but to see a recommended time for it to take place is very useful.

billsreef · 01/27/2003, 09:42 PM

Habib,

You sure your a chemist and not a phycologist?

Habib · 01/28/2003, 03:26 AM

Bill,

You sure your a chemist and not a phycologist?

I am just a kindergarten drop-out.

01/27/2003, 10:37 AM	#1
Randy Holmes-Farley Reef Chemist Join Date: Apr 2001 Location: Arlington, Massachusetts Posts: 86,233	Names of different macroalgae parts Bill or any other macroalgae experts: What are the appropriate terms for the different parts of a macroalgae? Specifically for Caulerpa racemosa, the growing tip is called what? The "grapes" are what? The root-like parts are? __________________ Randy Holmes-Farley Current Tank Info: 120 mixed reef

01/27/2003, 12:26 PM	#2
Habib CEO of Salifert Join Date: Apr 2002 Location: Holland (Europe) Posts: 19,447	Randy, Chemical Abstracts don't have pictures huh? C. racemosa: An algae with long stolons; its racemous-rhizoids point downward. Photosynthesis occurs in the clustered aggregations that, opposing the rhizoids, merely reach a few cm in height. Growth patten of phtotosynthetic thalli can vary from biforcated with tiny branches to entirely rounded bubbles. C.racemosa is one of the few species which originated from the Red Sea Above and more can be found : http://www.sbg.ac.at/ipk/avstudio/pi...t/caulerpa.htm I hope that is of some help so far. __________________ Proud owner of the very rare YET (Yellow Elephantis Tang) from the Lord Bibah Islands. "Ice cream, steaks, and Bailey's Irish Cream all help promote healthy immune systems. Why else would I love to naturally eat them packed with fat as they are?" - R. Holmes-Farley, 2012

01/27/2003, 12:46 PM	#3
Randy Holmes-Farley Reef Chemist Join Date: Apr 2001 Location: Arlington, Massachusetts Posts: 86,233	Thanks, Habib. That does help a lot. Photosynthesis occurs in the clustered aggregations that, opposing the rhizoids, merely reach a few cm in height. Unfortunately, it also raises an ugly question for me. I was planning on running my Caulerpa/iodide experiment on simple, 4-6" lengths of stolon, with no thalli. I figured it would introduce too much variability to use thalli too since different thalli are very different sizes. But if the stolon is not phososynthetic, then those lengths won't grow at all. Of course, they are green, so maybe they do photosyntehsize in addition to the thalli. __________________ Randy Holmes-Farley Current Tank Info: 120 mixed reef

01/27/2003, 02:23 PM	#4
Habib CEO of Salifert Join Date: Apr 2002 Location: Holland (Europe) Posts: 19,447	Randy, Here is an interesting article dealing with nutrient limitation (not iodide) and growth of various Caulerpa. There is also a section about sample preparation (materials and methods) and includes C. racemosa. http://www.botany.hawaii.edu/Bot482/...Mar%20Biol.pdf __________________ Proud owner of the very rare YET (Yellow Elephantis Tang) from the Lord Bibah Islands. "Ice cream, steaks, and Bailey's Irish Cream all help promote healthy immune systems. Why else would I love to naturally eat them packed with fat as they are?" - R. Holmes-Farley, 2012 Last edited by Habib; 01/27/2003 at 02:40 PM.

01/27/2003, 02:38 PM	#5
Randy Holmes-Farley Reef Chemist Join Date: Apr 2001 Location: Arlington, Massachusetts Posts: 86,233	Thanks again, Habib. They used the thalli but I'd like to do the experiment on a smaller scale (maybe stolons only, or stolons plus 1 thalli set). Anyway, much of the info is useful. The preconditioning, for example, which is something that I intended to do after cutting, but to see a recommended time for it to take place is very useful. __________________ Randy Holmes-Farley Current Tank Info: 120 mixed reef

01/27/2003, 09:42 PM	#6
billsreef Moderator 10 & Over Club Join Date: Oct 1999 Location: Long Island, NY/North Miami Posts: 36,538	Habib, You sure your a chemist and not a phycologist? __________________ Bill "LOL, well I have no brain apparently. " - dc (Debi) Current Tank Info: Far too many tanks according to my wife, LOL.

01/28/2003, 03:26 AM	#7
Habib CEO of Salifert Join Date: Apr 2002 Location: Holland (Europe) Posts: 19,447	Bill, You sure your a chemist and not a phycologist? I am just a kindergarten drop-out. __________________ Proud owner of the very rare YET (Yellow Elephantis Tang) from the Lord Bibah Islands. "Ice cream, steaks, and Bailey's Irish Cream all help promote healthy immune systems. Why else would I love to naturally eat them packed with fat as they are?" - R. Holmes-Farley, 2012