I doubt if anyone knows the mechanism, but geotropism is well-understood and I
assume that more or less the same applies. My point in writing is to draw
attention to the same trait in Ansellia (Africa) some Cymbidium (chiefly
mainland Asia) and Grammatophyllum (Pacific Asian).
All of these are
The physiological mechanism that induces development of a structure one
thing, and its ultimate, adaptive function is another (e.g., how fingers
develop during human embryonic development does not explain how they are
later used in adult life). Differential auxin levels might very well
Max Rocky,
I have cats, oncidiums, maxilatias, bulbophyliums many orchids on truncks
the the roots climb to look for water.
Jim
___
the OrchidGuide Digest (OGD)
orchids@orchidguide.com
Hello Rocky,
Regarding your question on the roots of catasetums.
I think that this is natures way of ensuring that the plants get all the
nourishment that they require when growing on trees etc. Whereas when they
are growing in pots, they receive all the food and water from their grower.
I have
I do well with them as long as I follow the
rules..no leaves no water..HOWEVER..with some hybrids you get new growth started
as the leaves fall..as long as you have inch or so long roots on the new growth
you will have to continue watering..but sparsely..just enough for the new growth
to
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