|MadSci Network: Cell Biology|
The effects of magnetism on plants is contentious. There are as many studies reporting negative findings as positive. Some of the inconsistencies have arisen because scientists have used such a diversity of experimental protocols. Some have used strong magnets, others weak. Some have been careful to take into account ion effects from the magnet itself: others havenít. Some have used stationary magnets; others moving magnets. Some have studied the effects of reduced geomagnetic fields on plants; others enhanced.
Some have argued that electromagnetic frequency is a more important experimental variable than absolute strength. Of course, all of this research was done on different species at different stages of development...it is quite possible that a seed may respond much differently than a fully hydrated seedling.
Due to this contentious history, you probably wonít find much mention of magnetism and plants in textbooks and databases (moreover, much of the post-WWII research is published in Russian). In short, I don't know the answer to your question, particularly as you are vague about the details of your proposed protocol. My hunch is that you will find no effect in most cases, but let me point you in the direction of three old and dusty articles that may inspire you:
Palmer JD (1963) Organismic spatial response in very weak spatial magnetic fields. Nature 198: 1061-1062 Brown FA, Chow CS (1975) Non-equivalence fro bean seeds of clockwise and counterclockwise magnetic motion: a novel terrestrial adaptation? Biol Bulletin 148:370-379 Jones, RL (1960) Response of growing plants to a uniform daily rotation. Nature 185:775
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