Gibberellins are a second class of hormones that stimulate plant growth. Compare auxin-induced growth to gibberellin induced growth including the type of organs stimulated, concentration dependencies, and the nature of the stimulation. Gibberellins also stimulate alpha amylase synthesis is the aleurone layer in cereal grains. How does gibberellin stimulate expression of the amlyase. Describe these hormones and the general effects that these hormones have on development.
Ethylene is commerically important in fruit ripening.
Look through your text and find other examples of commercially important uses of hormones . How was it discovered that both auxin and cytokinin were required. Describe the cross talk that occurs between hormones when deep water rice encounters rising flood waters. Stress Physiology 1. Describe each of the following phenomena and explain the survival value it is to the plant.