Reaction wood also responds to moisture differently from normal wood.
2.
Reaction wood can twist, cup or warp dramatically during machining.
3.
Have a look at thigmomorphogenesis and reaction wood.
4.
Such wood is called reaction wood, and it usually is bent to a really grotesque degree.
5.
The term adaptive growth'therefore includes, but is not synonymous with, the formation of reaction wood.
6.
The controlling factor behind reaction wood appears to be the hormone auxin, although the exact mechanism is not clear.
7.
Reaction wood may be laid down in wider than normal annual increments, so that the cross section is often asymmetric or elliptical.
8.
The effect of reaction wood is to help maintain the angle of the bent or leaning part by resisting further downward bending or failure.
9.
The reaction wood formed by this process can be studied using dendrochronology using annual growth rings to determine when the tree was subjected to tilting.
10.
For instance, ripping a piece of reaction wood on a table saw without a splitter or riving knife installed can lead to kick back of the stock.
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