Plants can be propagated by various asexual meansstem cuttings grow adventitious roots
root stock forms stem buds in response to injury
Galls: leaf galls or stem galls
usually stimulated by wasp laying eggs
. . -wasp also injects chemical into plant
. . -causes de-differentiation
. . -resulting in growth of gall
in Lab, same chemical induces gall growth in any spp.
. . -application of plant hormones induces
re-differentiation into stem or root
. . . auxin or gibberellin
resulting normal-looking plant is "clone"
. . -several economic plants have been
. . . carrots, tomatoes, cucumbers, ...
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© 2004 Prof. LaFrance, Ancilla College