What is the difference between primary and secondary growth in plants?

Will there be a difference in the growth of plants exposed to north pole of the magnet as opposed to south?

• I am trying to figure out an experiment for my research paper in high school. I came across some abstract on the net stating that the plants exposed to the north pole of a magnet during growth were smaller in size as opposed to the south. the person guesses the reason for it could be the auxin and other growth hormones' content. If that is the topic i would like to explore. How would I be able to measure the Auxin content in the plant? and is this reason and claim true? are there any other possible reasons? I desperately need your help ppl!! please :(

• Answer:

  not only the auxin and other growth hormones' content, it is the environmental conditions, temperature, edaphic factors, nutriental factors that can make a difference in the growth of plants. moreover, it depends upon the plant species as well, to what extent it can grow.. To measure the Auxin content: http://www.nature.com/cr/journal/v11/n4/full/7290096a.html http://www.blackwell-synergy.com/doi/abs/10.1111/j.1432-0436.1984.tb01345.x hope that helps..