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brown stuff secreted by plants??

Michael L Roginsky d_micro at ix.netcom.com
Mon Mar 25 16:51:45 EST 1996

In <4ip494$g5g at sunca.ncaur.gov> skorycd at ncaur1.ncaur.gov (Chris Skory)
>This question will probably reveal my ignorance in plant physiology, 
>but, I was curious what general types of compounds do plants secrete 
>from their roots.   I ask this because I saw some plants (eg lettuce, 
>carrots, etc) growing in sterile medium the other day.  The medium 
>became increasingly more turbid and brown as the culture grew.  Is 
>this protein, alkaloids or some other secondary metabolite.  Any 
>help would be appreciated.
>Chris Skory
>skorycd at ncaur1.ncaur.gov

It appears that the "sterile medium" has been compromised. In plant
hydroponics, the growing medium is enriched with soluble nutrients and
circulated over again. You may have a spore culture started, or a
bacterial invasion. Check it out under the microscope!

Micro, not a microbe!

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