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pinetree30

Grafter's Assistance Needed

17 years ago

There's a classic experiment from 100 yrs or so ago, I think with Araucaria, where a scion from an older tree was grafted on a young rootstock, but persisted growing as a branch for many years, not growing as a leader. Can't find any reference in my chaotic "home office" (such as it is). Can't even remember the ugly word for that phenomenon. Getting soft in the head perhaps? Don't comment on that.

Have any of you had that happen in your own grafting? I'd appreciate knowing your experiences.

Thanks!

Comments (7)

  • 17 years ago

    I am not sure I understand your question.
    Are you saying that after adding the scion wood to the rootstock, that the rootstock continues growing branches?
    If that is the case, yes, I have that for at least a year and have to snip out the branches as they grow.
    My grafting technique is different from some, I do side grafts as low as I can, and leave the "parent" after topping it. I do not cut the parent out until around august. This is typically when the bands begin to disintgrate by themselves.
    I am not sure I answered your question?
    Steven

  • 17 years ago

    Grafts not re-establishing apical dominance well or at all? Happens all the time with conifers, but it is true that Araucaria are the worst at it, side branches never gaining tree form. Sorry, don't know the particular reference, though.

    Resin

  • 17 years ago

    Pinetree,

    When grafting lower side branches it can take many years to develop a leader. I don't have any experience grafting Araucaria. There is a chemical in the cell that is produced "reprograming" the buds to start growing vertically rather then horizontally. Age of the original tree and species makes a considerable difference as to when they will grow "normal" again.

    I will try to hunt down the name of the chemical the plant produces. The trip down memory lane isn't working.

    Darren

  • 17 years ago

    Abies procera 'Glauca prostrata' is another example of a branch stays a branch. Although these can and do eventually form leaders.

    I guess, like many things, standing upright is a hormonal thing. Auxins and cytokinins and such. "Apical control" was the only term my limited mature memory can muster for the opposite of apical dominance.

    tj

  • 17 years ago

    Look up "orthotropy" vs. "plagiotropy" in conifers. The reference should be somewhere...

    This occurs with cuttings too and with Agathis, but apparently not Wollemia. It is easy to overcome this by simply harvesting the leader for propagation. The Araucariaceae rapidly replace the leader with one or more often, multiple replacements...

  • 17 years ago

    Thanks Salicaceae, "plagiotropy" is the word I was trying unsuccessfully to pound out of my head.

  • 17 years ago

    There are similar problems with cuttings from old trees. for example, I made cuttings of a blue narrow cultivar of sequoia sempervirens, a lateral branch.
    Well, I got several rooted cuttings. Only one made a leader. The others are prostrate. One of them is 5 or 6 years old. Looks like a ground carpet. I think we name this result 'Cultivariant'