Login
User Name
Password   


Registration is FREE. Click to become a member of OrchidBoard community
(You're NOT logged in)

menu menu

Sponsor
Donate Now
and become
Forum Supporter.


Many perks!
<...more...>


Sponsor
 

Google


Fauna Top Sites
Register Members O.C.D. Search Today's Posts Mark Forums Read
LOG IN/REGISTER TO CLOSE THIS ADVERTISEMENT
Go Back   Orchid Board - Most Complete Orchid Forum on the web ! > ORCHID DISCUSSIONS > Beginner Discussion
Like Tree1Likes

Reply
LinkBack Thread Tools Rate Thread Display Modes
  #1  
Unread 05-08-2008, 03:49 PM
Senior Member
 

Join Date: Apr 2008
Zone: 8b
Location: San Jose, CA
Posts: 164
Smile Firm Brown Roots

Hi! I have a question regarding roots.

When I trim the rotten roots off of an orchid, very often I see roots that are cream or brown. If I cut off the tip of this root, I see the thread inside. However, it is firm.

My question is, is this root rotten or not?

The reason I am asking is because I thought that rotten roots had to be soft and mushy. The one I am asking about is firm and yet it is brown or cream colored.

Thanks everyone!
Reply With Quote
  #2  
Unread 05-08-2008, 03:53 PM
Dorothy's Avatar
Super Moderator
 

Join Date: Apr 2007
Zone: 7b
Location: Long Island, NY
Age: 53
Posts: 7,357
Default

Cream, brown and firm, I would consider, not rotten.
Black and mushy is rotten.
__________________
Dorothy

"Nothing beats the orchid -- as an offering of love"
- paraphrasing Marlowe Hood from 'Orchid Fossil Quells Evolutionary Quarrel'


Toto, I Have A Feeling We're Not In Kansas Anymore! ...
Reply With Quote
  #3  
Unread 05-08-2008, 04:18 PM
Senior Member
 

Join Date: Sep 2006
Zone: 5a
Posts: 9,286
Default

The fat part you are calling brown (or cream) is not the root. That is a coating the root uses to quickly absorb moisture and hold it till the root gets what it needs. The reason it is brown (or cream) has to do more with the age of the velamin (the coating) not the root. Normally for most orchids, the "roots" turn white when they are dry and green or brownish when they are flush with water. They are not rotten. And broken velamin is OK also. It still functions.
Reply With Quote
  #4  
Unread 05-08-2008, 04:50 PM
Senior Member
 

Join Date: Apr 2008
Zone: 8b
Location: San Jose, CA
Posts: 164
Default

Thanks! I didn't cut them off just to be sure.
Reply With Quote
  #5  
Unread 05-09-2008, 06:09 AM
Member
 

Join Date: Nov 2007
Location: Sydney, Australia
Age: 42
Posts: 90
Default

Hi I wonder if you clarify a little more.

What if the velamin is dark chocolate colour and wet but firm not mushy.

Are these roots one step away from rot?

Last edited by ipv6ready; 05-09-2008 at 08:40 AM..
Reply With Quote
  #6  
Unread 05-09-2008, 07:58 AM
Senior Member
 

Join Date: Oct 2006
Zone: 6b
Member of:NFOS
Location: North Tonawanda, N.Y.
Posts: 333
Default

If the roots are still quite firm and mot mushy they are still functioning properly.
Reply With Quote
  #7  
Unread 05-09-2008, 09:33 AM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Location: Buckingham PA
Posts: 6,204
Default

Keep in mind that some of the organic materials used in potting media can release pigmented chemicals. Bark for example, can realease tannins, which are brown and water soluble. If the velamen absorbs the tinted liquid, it will appear brown.

I think it's also important to understand that an orchid root is not two-layered - velamen and central core - but is actually typically 6-layered.

Starting at the interior, we have the stele, which is the wiry core remaining in a dead root. Outside of that are the thin endodermis, cortex, exodermis and then velamen, which is simply dead exodermal cells that act as a sponge to store water.. The 6th "layer" is the root cap, which protects the root meristem at the tip.

This microscopic cross-section of an orchid aerial root shows the 5 distinct layers quite clearly. You'll note the velamen only accounts for about the outermost 20%:

Semtia likes this.
__________________
Ray Barkalow, Orchid Iconoclast
Using science and logic to advance orchid growing
Your best deal on orchid supplies: shop.firstrays.com
Reply With Quote
  #8  
Unread 05-09-2008, 09:42 AM
Gin's Avatar
Gin Gin is offline
Senior Member
 

Join Date: May 2006
Zone: 5b
Location: So. Mo.
Posts: 3,325
View Gin's Gallery Female
Default

I learned something new, Thank you for the info .
Gin
__________________
It does not matter what you paid for it . Loving what you have is what counts ..
Reply With Quote
  #9  
Unread 05-09-2008, 10:34 AM
kimstwin's Avatar
Senior Member
 

Join Date: Jan 2008
Zone: 9a
Location: Central Florida
Age: 36
Posts: 146
Default

Thanks for posting that. I have never seen a diagram of a root like this. Interesting stuff.
__________________
"Flowers really do intoxicate me"
Vita Sackville-West
Reply With Quote
  #10  
Unread 05-09-2008, 10:35 AM
Jr. Member
 

Join Date: Feb 2007
Zone: 5a
Location: The beautiful Wasatch Front, Utah
Posts: 24
Female
Default

My paphs are in shredded coconut fibers or bark. Their roots are chocolate brown and firm. They are growing quite nicely. The water, when it drains out the bottom, is also brownish. I agree that the media may be the source of the color of the roots. A firm root is a good root. When a root is dead, it is mushy.
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vanda/Ascon. roots, roots, roots Don Perusse Vanda Alliance - others 16 11-11-2010 11:05 AM
Dead roots on old growth elibrown81 Semi-Hydroponic Culture 2 04-24-2008 12:26 PM
Roots. FL_GROWER82 Beginner Discussion 9 08-17-2007 04:41 PM
Here's My Trade List for April 2007 llama llama duck Auto Generated Threads by Classified System 5 05-10-2007 02:26 PM
Problem with some roots turning black in S/H Linnie Semi-Hydroponic Culture 13 11-19-2006 07:59 PM

All times are GMT -4. The time now is 01:37 PM.

© 2007 OrchidBoard.com

Clubs, ShowCase vBulletin Plugins by Drive Thru Online, Inc.

SEO by vBSEO 3.6.0