North American Fruit Explorers mailing list at ibiblio

[jim <jmc1@epix.net>]

re:  Willow and rooting--
 
    It may be a good idea to break down rooting of cuttings
into stages:
1) Root initiation (root primordium formation);
2) Growth of the primordium inside the stem;
3) Extension of the primordium through the epidermis or callus;
4) Establishment of the root.

    Almost all species of willow carry an abundance of root initials, preformed in the stem on the tree at a very early growth stage.  In most species these root initials are most abundant at the nodes, but frequently they also occur in "combs", originating in the vascular strands.  Some of these root primordia complete stage 2 and sometimes stge 3 on the intact shoot.  Willow cuttings are made to permit these preformed initials to grow and erupt through the epidermis.
    Peaches and almost all other Prunus do not have preformed root initials. Root initiation, the first step in regeneration by cuttings, is therefore carried out off the mother plant.  Application of "hormones" (PGRs) is made to produce these root initials, usually in the same tissues as in willow.  Persuading the PGR-induced initials to grow and erupt (the second and third phases) follows.
    On willow, there is often at least a rudimentary connection between the stage 2 primordium and the vascular system of the cutting.  On peach, etc., this connection occurs quite late in the game.
    Incidentally, most of the Malling and Malling-Merton apple rootstocks initiate a few root germs not far behind the growing tip.

//Jim
www.cumminsnursery.com
 
 

Helga and Bert Dunn wrote:

Tom
Several articles on willow suggest you fray the stalk considerably so water
will absorbe more of the hormone qualities.
Warm water is a better dissolver than cold likely
Cheers   Bert

Bert Dunn   RR4 Tottenham   Ont    zone 4b
www.hardygrapes.tottenham.on.ca

see also http://www.littlefatwino.com/bertslist.html

Sent: Wednesday, January 31, 2001 4:16 PM
Subject: Re: [nafex] Mist Propagation Alternatives

> Well... salts and minerals seem to be able to pass through clay pots very
> well, as they end up building up on the outside of them.  I would think a
> water soluable hormone would pass too.
>
> Any experts out there who know?
>
> You have a very interesting idea there.
>
> How long does you willow water need to steep?   Is water warmed at all, or
> kept cool?   Should it be kept out of sunlight?  I think sunlight breaks
down
> the IBA hormone.

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