From: lbmkjm at yahoo.com (brian lee) on 2008.06.09 at 18:50:41(17819)
Dear Peter,
Aloha and mahalo for this additional information. I can understand the delay... tuak and wild boar...eat and drink until you sleep.
I love this sort of information, root glues and stem disarticulations. This is changing the subject, but, can you start a new thread on Schismatoglottis? I do not know much about the species listed, but it is long and I have seen only a few in cultivation. Could you educate us on the more ornamental species in this genus? At least the species you encounter?
Aloha,
Leland
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--- On Sun, 6/8/08, Peter Boyce wrote:
> From: Peter Boyce
> Subject: Re: [Aroid-l] an apolgy if it is order
> To: "Discussion of aroids"
> Date: Sunday, June 8, 2008, 9:35 PM
> Hi Leyland,
>
> Sorry for the delay in replying; just been the big Gawai
> holidays here so a
> bit tied up with drinking tuak and eating wild boar.
>
> Root glue occurs in the feeding roots all Asian genera (but
> not all the
> species of each genus) of the Monstereae (e.g., Amydrium,
> Rhaphidophora,
> Scindapsus & Epipremnum), in Anadendreae (Anadendrum
> only) and in Pothos and
> Pedicellarum of Potheae. It is visible as a cap of
> 'gel' on the active root
> tip. The most striking 'caps' are found in the
> Hookeri complex of
> Rhaphidophora (R. hookeri, foraminifera, puberula,
> todayensis) in which not
> only do the active tips of the feeder roots have a very
> substantial cap but
> the climbing roots arise in masses along the stem and
> produce copious
> quantities of gel/slime that not only glues the roots to
> the climbing
> surface but also seems to provide an ideal environment for
> additional root
> development such that pulling one of these from the tree
> often removes a
> fair proportion of the adjacent bark.
>
> Shoot disarticulation so far is found in the Asian
> rheophytic genera. I have
> also observed (in cultivation) the same in W Africa
> rheophytic Anubias but I
> have never been to W Africa and so cannot say whether other
> African
> rheophtyes (Nephthytis, some Cercestis) have
> disarticulation mechanics.
>
> Very best
>
> Pete
>
> ----- Original Message -----
> From: "brian lee"
> To: "Discussion of aroids"
>
> Sent: Tuesday, June 03, 2008 5:18 PM
> Subject: Re: [Aroid-l] an apolgy if it is order
>
>
> > Dear Peter,
> >
> > Aloha. Thank you for answering Steve's inquiry
> with
> > this interesting set of observations....do you know of
> > root glues or stem disarticulations in other plant
> > genera? What other botanical life history secrets can
> > you share?
> >
> > Aloha,
> >
> > Leland
> >
> > --- Peter Boyce wrote:
> >
> >> Hi Steve,
> >>
> >> The root tip thing is very interesting. While up
> at
> >> Batang Ai last week took some time to look closely
> >> at a very common species of Piptospatha and
> realized
> >> that the active root tip was always coated in cap
> of
> >> viscous gel; looking at root development it dawned
> >> on me that the gel was acting as an adhesive; as
> the
> >> root progressed across the rock the gel cap laid
> >> down a thin film, much the same as a slug or snail
> >> does, and the developing root hairs bound into
> this,
> >> gluing the root to the rock to the extent that
> >> attempts to remove older portions the root
> actually
> >> removed fragments of the rock (shale).
> >>
> >> The shoot tip thing is that the active shoot is
> >> attached to the older part of the stem by a line
> of
> >> weakness that functions as a point of potential
> >> disarticulation. When the river flow becomes to
> >> great such that the drag on the leafy portion has
> >> the potential to dislodge the entire plant, the
> >> leafy shoot breaks at the point of weakness and
> thus
> >> by sacrificing the active shoot/s the plan is able
> >> to reduce drag and thus prevent total
> dislodgement.
> >> The stumps remaining readily re-sprout, often
> >> forming multi-headed plants. Aside from
> 'saving' the
> >> mother plant the 'lost' active shoot tips
> frequently
> >> end up in a suitable environment for
> >> re-establishment and thus act as dispersal units.
> >> Another interesting aspect of this process is that
> >> the disarticulation point 'moves' with the
> extension
> >> of the active shoot and thus only the same size
> >> piece of active shoot is shed each time.
> >>
> >> Very best
> >>
> >> Pete
> >> ----- Original Message -----
> >> From: ExoticRainforest
> >> To: Discussion of aroids
> >> Sent: Monday, June 02, 2008 7:19 PM
> >> Subject: [Aroid-l] an apolgy if it is order
> >>
> >>
> >> Pete, this message from you is more valuable
> than
> >> I can make clear. I have several mentors who are
> my
> >> honest-to-goodness heroes and friends. And I hope
> >> you know you are one. Tom, Simon, Eduardo,
> >> Alistair, Julius, Leland and many others, a list
> too
> >> long to mention, help me all the time! My goal
> has
> >> been only to self-educate myself and to try to
> share
> >> what I learn in a way anyone interested in aroids
> >> can utilize. I am a writer who has been putting
> >> words on paper for over 30 years. But without
> >> accurate sources there is nothing to write!
> >>
> >> You have answered my questions many, many times
> >> and always help to make what I'm trying to
> >> understand clear. And that is at least in part
> the
> >> reason I quote all of you rather than trying to
> put
> >> what you teach in my own words. As a
> non-scientist
> >> my words are useless, but your words have value!
> >>
> >> So thanks for your kindness and your continued
> >> help. With the same thanks to all the
> professionals
> >> who teach me something new in their journals and
> >> emails on virtually a daily basis. If I could
> offer
> >> advice to anyone who is interested in aroids it
> >> would be to build a library of good scientific
> >> material on the genus. In the beginning the
> reading
> >> is difficult, but I time you will begin to
> >> understand the scientific terms and all those
> >> questions become clear answers.
> >>
> >> Now, a big request! Tell us about "the way
> roots
> >> glue themselves to rocks and how the shoot tips of
> a
> >> rheophytes resist water flow in spate." You
> just
> >> opened up a new file in my brain and I want to
> know!
> >>
> >> Steve
> >>
> >>
> >> Steve,
> >>
> >> I live in a country where we constantly
> struggle
> >> to get our students to read..... believe me...you
> >> can NEVER read too much. I have worked with aroids
> >> in one way or another for 30+ years;
> professionally
> >> for 20+ years... I read about aroids, any aroids,
> >> every day. And every day I learn something
> >> new...this week so far I have learned something
> new
> >> about pollination, the way roots glue themselves
> to
> >> rocks and how the shoot tips of a rheophytes
> resist
> >> water flow in spate. Tom, who has just tuned 70,
> has
> >> worked on aroids for over 40 years... he reads
> every
> >> day... Josef has worked on aroids nerly 50
> years...
> >> he reads every day... and I would bet that they
> too
> >> are constantly learning new things.
> >>
> >>
> >>
> >>
> >
> ------------------------------------------------------------------------------
> >>
> >>
> >> _______________________________________________
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> >> Aroid-L at www.gizmoworks.com
> >>
> http://www.gizmoworks.com/mailman/listinfo/aroid-l
> >> >
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> >>
> >
> >
> >
> >
> > _______________________________________________
> > Aroid-L mailing list
> > Aroid-L at www.gizmoworks.com
> > http://www.gizmoworks.com/mailman/listinfo/aroid-l
> >
>
>
>
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