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Re: Hormones


> 
> Joanne and other Robins,
> 
> I should have explained the purpose of the original post and the
> attachment about Hormone characteristics. It was intended to be an essay
> piece to stimulate a series of discussions on the Honza Robin about the
> role of Hormones in plants...for a better understanding of WHICH
> hormones are produced by the mature or immature plants. The five natural
> hormones which the plant produces are auxins, cytokinins,Gibberillins,
> ethelene gas and Abscisic Acid. The table was a synthesis of a lot of
> study to describe these characteristics and their role in the growth of
> plants. There was no intent to translate this understanding of  hormones
> into a recipe  or formula of any material ( such as Rootone)  because
> the function of hormones in plants is so complex. First is the
> understanding of the what  and the why...then comes the possible
> application of the understanding of hormones for possible practical use.
> But that would be some distance from where we are now.
> 
> If you study the table a little bit you will observe that each hormone
> has a function in the growth processes. Yes, auxins and cytokinins are
> important in tc. They are a part of the formula one employs to make up
> culture media used in a tc lab. But ethelene is not involved in this
> specific use, nor is Abscisic Acid except in certain types of tc
> operations (such as with micropropagation of conifers...but that's a
> detail that doesn't interest us here.) But you don't go to your local
> garden center and say...give me a pint of auxin.  They wouldn't know
> what you were talking about. Nor would I.
> 
> What I intended with my discussions was to cover some important
> physiological functions that occur naturally in plants based upon the
> role of hormones which may or may not influence certain ways plants
> grow. When you understand the  principles of plant physiology ( some of
> which involve the several hormones), then you can  make better decisions
> about cultural practice management alternatives. In other words I was
> leading up to some simple discussions in Plant Physiology 101. Maybe we
> won't even get that far because a large group tends to go off on
> different tangents...i.e. we don't  understand what the other is trying
> to say.
> 
> This is not intended to be critical...just descriptive of what is
> happening.
> 
> I might say that I had also intended to write much more on the subject
> of the influence of hormones on hostas...partly because Tom Micheletti
> asked me to do so for possible use in the Winter Scientific Meeting
> sometime. But I have not developed more information on the subject yet.
> Maybe I might from stimulation via these kinds of discussions.
> 
> If anyone is interested we can discuss the role of hormones in
> propagation of hostas, for example. This subject is complex. We know HOW
> to propage but many of us don't understand WHY we do certain things, nor
> do we understand WHAT is happening inside the plant's tissues and cells.
> 
> Then there is a whole series of other subjects that involve specific
> hormones and their functions....dormancy, flowering, bud formation,
> apical dominance,
> root growth, plant stress, propagation by tissue culture, etc.
> 
> We probably won't get this far because when spring comes we will all be
> outside working in our gardens.
> 
> Jim

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