Maximum Yield USA December 2016 | Page 116

chemist’s corner Enzymes are organic substances produced by beneficial microbes that are becoming a common ingredient in plant supplements found at the grow shop. Enzymes can be used beneficially in the garden, but they must be the appropriate enzymes for the desired chemical reactions. When used properly, they can be a useful tool to promote healthy plant growth. Here’s a brief rundown on how enzymes work. E nzymes are a form of catalyst—they lower the activation energy needed for a particular chemical reaction. The enzyme molecules are not themselves changed by the reaction, so they return to their starting state after they have acted on their target molecules (their substrates). Enzymes are similar to cookie cutters in that they can be used over and over to effect change on something else, without changing themselves. As they affect change, they are affected by inhibitors and activators. Inhibitors make the enzyme slow down or stop altogether; they change the shape of the enzyme so that it either doesn’t accept a molecule, or so that it accepts it more slowly. Activators, such as hormones, speed up the activity of enzymes. 114 Maximum Yield USA  |  December 2016