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[IBC] unrestrained top growth
Lynn,
Unrestrained top growth should do the trick for all trees that I have worked with. Can't think of one that did not work that way. Jerry Meislik Hmmmm. That's a tough one. Obviously, the more foliage, the more transpiration, and the easier to overwhelm a weak root system. However, if you put the tree in a high-humidity tent, which would minimize transpiration, would greater foliage improve root growth? There would be more energy available for growth, but as I explained a couple weeks ago, sugar is moved in plants using a "source-sink" mechanism, so sugar won't move to where a potential root *ought* to be, only to a new, actively growing root. Besides, some research shows that high sugar concentration inhibits lateral root development. And how do you get root initiation? By the action of hormones. Auxin, produced by apical meristems of shoots stimulates lateral root growth. So if you prune the top growth, you will temporarily be reducing auxin, although as soon as back-budding occurs, and all the new branches begin to grow, the amount of auxin will be increased. So a tree that buds back quickly and easily would probably produce new roots rapidly, too. However, if a tree was in real trouble, it might be better to leave the strong apical meristems in place. I don't know; I'm afraid I'd be stuck with trial and error. -- Nina Shishkoff Frederick, MD ************************************************** ****************************** ++++Sponsored, in part, by Mike Page ++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
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