Botanical PCT

From Greg Williams (921028)

To whom it might concern: Address change for Willliam C. Littlewood, to P.O.
Box 1171, Eastsound, WA 98245-1171.

Weather has been so nice lately that CLOSED LOOP will be delayed a few (I
promise) more days so we can finish siding on another wall. Thanks for being

Isaac N. Kurtzer (921026.1743)

PCT says that organisms(living) are control systems; does this apply to
plants as well. like how flowers turn to the the light, or fold up at
nighttime, or how a venous flytrap catches flies, etc.

At least some of those sorts of behaviors are controlling perceptions. Of
course, this is most obvious when the effectors act reasonably quickly, and
many plants don't have such quick-acting receptors (but still slooowly control
some perceptions, like "roots down, shoots up," where "down" and "up" are
perceptions based on sensing the direction of gravity. And plants' biochemical
control systems are much like the biochemical control systems of other kinds
of organisms. It is even beginning to look like plants have immune systems
organized similarly to the immune systems of higher animals.

I realize that they have no comparable neural structures (actually I am
completely ignorant either way) but couldn't their interactions be modeled

There is an article titled "The Secret Feelings of Plants" in the 17 October
issue of NEW SCIENTIST (pp. 29-33) which reviews evidence that "nervous
systems of plants and animals have more in common than was once thought." So
far, no one has done PCT models of plant behavior; a ripe field for theses! If
anyone gets serious about doing research in this area, I can provide
additional references, going all the way back to Bose's studies on the
sensitive plant -- I looked into all this as a neurophysiology student, for a

Best wishes,