Re: Ynt: [AGA Member] Anubias

[david <hipchack@yahoo.com>]

I do not know why the rhizome is cylindrical. There
could be many reasons. I do know that evolution takes
a long time ;). The reason I say that the rhizome is
photosynthetic is that it has a green pigment, and the
only green pigment I know of in plants is chlorophyll.
Chlorophyll requires light to fix carbon. I also know
that many plants are photosynthetic at the rhizome
:0). But do not take my word for it. It would be nice
if a plant biologist could chime in.

david

--- Faruk Gencoz <fgencoz@metu.edu.tr> wrote:
> David,
> 
> If it might be due to light deficiency then the
> rhizome should develop some
> skills to cope with low light levels because it is
> always under the leaves .
> The rhizome is cylindirical, if it was light
> sensitive I guess it would be
> better for it to be flat just like the leaves.
> 
> ----- Original Message -----
> From: david <hipchack@yahoo.com>
> To: <aga-member@thekrib.com>
> Sent: Monday, April 12, 2004 8:48 PM
> Subject: RE: [AGA Member] Anubias
> 
> 
> > I believe that the rhizome itself is
> photosynthetic
> > and requires light to grow. When it is buried the
> > rhizome loses any access to light and begins to
> rot.
> >
> > david
> >
> > --- Steve Pushak <teban@powersonic.bc.ca> wrote:
> > > I don't bury the rhizome however I do bury about
> the
> > > lower 1/3 of the
> > > roots which descend from the rhizome when I
> > > install/plant them. As the
> > > plant grows and the rhizome extends, the plant
> will
> > > grow sideways or
> > > upward if it needs to get to the light. It will
> > > continue to send down
> > > vertical root/stems which spread down into the
> > > substrate gravel & mud
> > > below that. I believe that the plants gain an
> > > advantage by having their
> > > roots in the mud where they can access
> mineralized
> > > nutrients only
> > > available in the anaerobic part of the
> substrate.
> > > The roots & root hairs
> > > naturally grow into the regions that they
> "prefer"
> > > over time. I've never
> > > seen necrotic roots on Anubias but I don't plant
> > > them into strongly
> > > reducing (anoxic organic) substrates either.
> > >
> > > Since these plants can be easily overshadowed by
> > > taller competitors, I
> > > sometimes pot my small Anubias b nana so that
> they
> > > gain an extra 4" of
> > > height in the tank. These little guys really
> need
> > > the help. I do the
> > > same thing with my Glossostigma which would
> quickly
> > > die if shadowed.
> > >
> > > Steve
> > >
> > > > Faruk wrote:
> > > >
> > > > >> Although the rhizome section is described
> as
> > > horizontal
> > > > subterranean
> > > > plant
> > > > stem, we know that Anubias' rhizome section
> should
> > > not be
> > > > buried. Would
> > > > anyone describe why Anubias' rhizome rots due
> to
> > > burying. Why
> > > > does it need
> > > > relatively aerobic conditions? <<
> > >
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