Expert: Dana Krempels, Ph.D. - 9/17/2010

Question
Hai, good day. Recently I have been reading chemical
coordination in humans and plant.
I would like to know what is the difference and similarities
between plant hormones and animal hormones?

Thanks.
"GOD BLESS".

Answer
Dear Abirami,

There are almost no similarities between plant hormones and animal hormones.  You can read about the major classes of plant hormones here:

http://www.bio.miami.edu/dana/226/226F09_13.html

(These are my botany course lecture notes, so they are not as detailed as a textbook would be, but I hope they help.)

Human hormones are many, and extremely complicated.  Mammals are much more complex than plants, in terms of homeostasis and interaction with the environment, probably largely because they are motile.  But that's a whole 'nother subject.

You can read more about human hormones here:

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/H/Hormones.html

While some plant hormones have somewhat similar functions as those in humans, these similiarities are analogous (superficially similar), and not due to common ancestry.

I hope this helps.

Dana