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  Amorphophallus tuber growth without leaf?
From: "StroWi at t-online.de" StroWi at t-online.de> on 2006.08.08 at 01:13:14(14479)
Aroiders,

in an austrian forum there was the observation reported that an
Amorphophallus tuber grows before it sends up a leave.

Has anyone made a similar observation and has an explanation for this?

The only points I can imagine is an increase of weight and volume by
water uptake before the leaf grows or a conversion of starch into sugar,
although I doubt that the latter increases weight and volume of an
tuber.

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From: Baumfarn Webmaster webmaster at baumfarn.at> on 2006.08.08 at 06:24:26(14480)
I see you got curious.

I give some more details.
1st case) A. kiusianus - plant not even developed the leaf correctly,
never unfolded completely and died fast away. The tuber tripples it's size.
2nd case) Helicodiceros muscivorus - i planted several tubers (some very
tiny) in a pot, just one realy thrived. Meanwhile the leaf begin to die
back and I digged down to see what the tuber do. And found beneath the
biggest tuber (the one with leaf) another tuber even bigger than the
other ever was.

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From: "StroWi at t-online.de" StroWi at t-online.de> on 2006.08.08 at 07:11:52(14481)
> 2nd case) Helicodiceros muscivorus - i planted several tubers (some
> very tiny) in a pot, just one realy thrived. Meanwhile the leaf begin
> to die back ?and I digged down to see what the tuber do. And found
> beneath the biggest tuber (the one with leaf) another tuber even
> bigger than the other ever was.
>
> greetings
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From: Douglas Bertelsen douglas.bertelsen at gmail.com> on 2006.08.08 at 07:41:10(14482)
Peter,
Soluble sugars would have a higher affinity for water as well as
increase the overall molality of the cell sap. I would follow that a
dehydrated plant (one sitting dry on a shelf) would rapidly take up
water both because of the dehydration and the starch breakdown.
Example: most seeds store energy as starches, but during imbibition
they swell several times their original size.

Doug

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From: Baumfarn Webmaster webmaster at baumfarn.at> on 2006.08.08 at 09:53:42(14483)
No, I don't believe it.
The offset would be greater than the original tuber?
The tuber was not 'connected' to anything.

greetings

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