question_answer 26)

  Gibberellins were first discovered in Japan when rice plants were suffering from bakane (the foolish seedling disease) caused by a fungus Gibberella fujikuroi. (a) Give two functions of this phytohormone. (b) Which property of gibberellin caused foolish seedling disease in rice?

Answer:

                Growth is dependent on three factors - initial size , rate of growth (r) and time interval (+) for which the rate of growth is retained. Where,                                  = final size,  = Initial size, r = growth rate, t = time, e =base of natural Logarithm, Relative growth rate   Thus absolute growth rate is 0.1907 while relative growth rate is 3.8cm