Re: Contractile Roots

At 08:51 AM 9/9/97 -0500, Sue Zunino wrote:
>Could this be what happens?  
>The bulb puts out contractile roots as stablizers, the plant grows, the bulb
>wastes away, the weight of the plant causes it to settle into the wasted
>bulb's hole, the plant dies then rebuilds it's new bulb at a deeper level
>where the next contractile root growth anchors it, and the process begins all
>over again. 
Well, shoot me if i am wrong, but the only truly contraile tissue in plants
(as in it contracts like animal muscle), has been found in certain
strangler figs. they start out as epiphytes, put down aerial roots into the
ground and them PULL until the host tree is a bent, humpy misshapen and
dead mess. Last i head this action was being studied in some wonderment.
Many plants with some weight sink into the earth. Cycads do. Now, it is the
habit of some Haworthias to grow not as above ground rosettes, but as
level-with the-surface plants, and one must repot them on a regular basis.
on the other had, whenever i do cosmetic repotting there is the dead old
main stem and dead roots, rather as if that part of the plant was
deciduous. it is hollow. conceivably the weight of the plant causes it to
sink ito that void.


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