Re: [aroid-l] juvenile vs. adult
- Subject: Re: [aroid-l] juvenile vs. adult
- From: "Eduardo Goncalves" email@example.com
- Date: Tue, 26 Nov 2002 12:17:55 +0000
Dear fellow (I coudn't find your name in the message),
Here follows my contributions to your question. Probably you will get
much more then this.
Nope. Noticeable changes in leaf form also occurs in terrestrial tuberous
plants. Leaves in Taccarum warmingii are triangular hastate when young, then
it has pinatelly compound leaves. Spathantheum usually have a cordate leaf
when young, that are usually deeply incised in mature plants. Sometimes,
adult plants can even keep cordate leaves. However, I think that most of the
incredible changes occurs in vining aroids, like shingle plants (Monstera).
1) Does this happen only to vining aroids?
I can see no direct relationship, but if you have more heat and
humidity, you plant will grow faster! In my experience, if you give a good
support for the growing plants (i.e., a totem or a nice tree), it will
change from a juvenile plant to an adult plant, whatever the time it takes.
I really think that the presence of a stem attached to the substrate is more
important than the light. Climbing plants growing with full sun, but no
totem, usually will not yield adult stems.
2) Besides lots of light, does this also require lots of heat and numidity?
Yes, if you have enough light and a proper totem to climb. Room enough
3) So can this be done indoors under home conditions without a greenhouse?
Can this be done in a greenhouse? Is this strictly for outdoors in
>tropical climates? It CAN be done in a greenhouse, but it is not easy, because some time it
needs a lot of growing space. BGs like Kew or Missouri have an interesting
apparatus for make climbers grow freely in their scientific collection, but
it is not easy and some plants will need usually much more than we can give
in a greenhouse.
Nobody knows exactly. "We" are suspicious that the diameter of the stem
is the trigger for the changes in leaf shape (as well for triggering the
flowering proccess), but we do not know the trigger for change in diameter.
I think that the presence of "excited roots", i.e., roots that were in
contact with a substrate and were able to embrace it have a positive effect
on the rise of diameter. "Non-excited roots" usually shrinks and probably
"say" something to the stem concerning "ok, we do not have a totem, so you
better keep slender, long and look for a decent substrate to climb".
4) What actually are the basic trigger and mechanism of this change?
There is a real environmental change from the forest ground (where most
climbers germinate) to the high canopy. If a plant is able of using better
each level That would be a paramount to success in this habitat.
5) What is the advantage of this change in evolutionary terms?
I would love to know. If you find it, let me know!
6) Is there a particular book that everybody else learned all this from
Very best wishes!
MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*.