RE: [Aroid-l] Leaflet use for tuber production.

**&* C* R* <c*@ecoanalysts.com>**

Hello, Bernhard!

Since you raised the issue of "plant nuts" thieving titanium leaflets, I am
wondering if I should answer your question. ;-)

Actually, the leaflets produce a small bulb first (about two months to do
so), and then from the bulb start producing roots (about another two
months), and then the leaflet falls off/dies and the bulb goes put up a new
small leaf or went into a short dormancy, and then put up a small leaf.
Leaflet cuttings with a petiole about 2cm thick or more were 80% successful.
Leaflets with the petiole with less of a diameter were only bout 25%
successful. The younger leaflets work best. The leaflets from older leaves
never worked.

I hope this is what you needed to know,
Christopher

D. Christopher Rogers
Invertebrate Ecologist/Taxonomist
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EcoAnalysts, Inc.
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-----Original Message-----
From: aroid-l-bounces@gizmoworks.com
[a*@gizmoworks.com]On Behalf Of StroWi@t-online.de
Sent: Thursday, January 25, 2007 12:29 AM
To: Discussion of aroids
Subject: Re: [Aroid-l] Leaflet use for tuber production.

Aroiders,

I remember that this was topic some years ago (you might search the
archives), but in that time there was much concern that this discussion
might end up in crowds of plant nuts taking leaf cuttings of every
A.titanum they can ever find in any Botanical Garden... ;-)
(BTW, I think that threat is real...)

When this discussion was going on I wondered if the possibility of
growing bulblets from leafs is retricted the the few Amorphophallus sp.
that build bulblets in the leaf axills.

Very interesting to read that leaf cuttings some sp. regenerate roots
and subsequently tuberlike organs.

@ Christopher,

congratulatins to you and Ernesto Sandoval for your success with
titanum.

Could you comment on the time needed and percentage of leaf cuttings
that root?  Furthermore, if every rooted leaf piece forms a bulblet  and
how long it takes to form it?

Thanks and good growing,
Bernhard.

However, Christopher could
-----Original Message-----
> Date: Wed, 24 Jan 2007 19:14:41 +0100
> Subject: RE: [Aroid-l] Leaflet use for tuber production.
> From: "D. Christopher Rogers"
> To: "Discussion of aroids"

> Howdy!
>
> At the University of California, Davis Conservatory we have propagated
> Amorphophallus titanium from leaflets. The guy who developed the
> method there is Ernesto Sandoval. Best results are obtained from
> terminal leaflets with a petiole about as thick as your index finger.
> The lamina is stripped from the portion of the petiole to be buried.
> The medium is
> vermiculite/perlite, and it is important to keep them upright, even
> propping them up if necessary. They are treated with a low dosage
> hormone (Rootone F), given plenty of bottom heat and high humidity.
>
> I hope this helps,
> Christopher

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