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[nafex] auxins/ ethylene/ scions






Brian wrote:
>According to what I've read, the auxin produced in the growing tip of most
>apple trees produces ethylene that translocates to the lower buds on the
>branch preventing growth.

I recently attended a great grafting workshop by Bob Purvis. One point I 
remember was to be sure your scion wood is isolated from ethylene producing 
fruit, if you store them in the fridge.  I had the impression that the 
ethelyne would make them break dormancy prematurely (rather then inhibit 
it).  Does this all mean that ethylene  exterior to a branch has the 
opposite to ethylene that is interior ?  Or could it be that the danger of 
ethylene on scionwood is suppression of the buds - thus a poorer success 
rate in grafting?

Secondly, does this mean it might be imporant to cut off the tips of all 
scionwood before storing?  Interesting stuff,   Del Z2/3

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