Recent content by 0soyoung

Ethylene. I've noted in another thread or two that ethylene enhances radial growth of stems. Blocking the flow of auxin causes natural ethylene production. This is why there is a flare in the stem at the top of a girdle or above a tourniquet. Likewise, this is why stems rapidly thicken once our...

Just a bit of pedantry to start: Bark grows from a separate bark or cork cambium that is created every year along with new phloem. As such a new layer of cork cells are created annually just like a new layer of wood (xylem) is --> there are growth rings in the bark analogous to growth rings in...

Those "pointy/pointed" buds are also a characteristic of Douglas fir (a definitive one in "my book").

The basic problem here is that the cambium died along this line because the chop and removal of the branch that would have been poking one in the eye (in this view). Consequently, there was insufficient auxin flow along this line to keep the cambium alive. With maples, this death typically this...

acer shirasawanum that I've grown from seed Lubos Skoda pot

Ahhh, its good to be home. :cool:

You can get bare-root seedlings for $9 each from Arbor Day. Get a bunch of them so that you can eliminate the fear factor and hence get on with quickly building up you bonsai "toolbox" (when to, how to, what to do to make and enjoy)...

"Over watering" is a common problem after repotting - try not watering it so frequently. As far as fungus is concerned, you can spray a solution of 2 teaspoons 3% hydrogen peroxide (from the grocery/pharmacy) in a quart of water every few days, instead of cutting off leaves. This solution is an...

There is a thing called Polar Auxin Transport (PAT) in the cambium that defines 'up' versus 'down'. It is due to 'PIN proteins' in the cell wall being on one end of the cell. An 'upward' graft (as you show on the left in your diagram) the PAT flow is continuously down on the underside of the...

Indeed, it does depend, but considering a few fundamentals will remove a lot of the mystery. Root growth is stimulated by auxin which is produced by leaves and buds (above). Auxin is consumed (above) when new growth is extending Transpiration is a fundamental process of tree life. Water and...

Logically it seems like a possibility. It works above ground because of the interruption of the normal direction of the PAT stream which causes ethylene production that affects the enhanced radial growth. The PAT continues all the way to the root tips and so, similarly wiring a root ought to...

Good nitrogen nutrition is of key importance for budding.

My observations are that the rate of stem thickening (vascular growth) increases in spring to a maximum shortly after the occurrence of the summer solstice, https://www.bonsainut.com/threads/cork-oak-repot-experiment.10594/post-166869...

I agree with @Cruiser;s diagnosis. I have experience with it in Japanese maples and have only cured the infection (and saved the tree) by cauterizing the area of and around the fruiting bodies. By 'cauterizing' I mean hitting it with a butane torch (in the same fashion as one can see Maro...