Restating of Epinasty Ideas

[socrtwo]

If it is true that epinasty is a plant's supplimentation of regular
transpiration with a mechanical water pump of sorts including a valve
(perhaps the stomata act this way) and a handle (the epinastic leaf),
then what are the conditions under which a plant might be expected to
need to engage this process?

To me its clear. Too much water or too little require the
supplimentation of transpiration. Thus we might expect:

1. ABA should lead to epinasty. This is because with less water in
the plant, the leaves might need extra help in getting water to
themselves. Maybe wilting ius really epinasty at first.

2. Ethylene - because of anoxia occuring during flooding. I now
believe Ethylene is really primarily an anoxia hormone.

3. Salicylic Acid - I now think this is a water abundance signal.
Note that Salicylic Acid was first discovered in Salix, Willow Bark.
Willows live on river banks with water logged roots. Weeping Willows
are in a perputual state of Epinasty.