|
Web Figure 15.5.D
Effect of colchicine addition and removal on cellulose microfibril angle and anisotropic growth of a young Nitella internode. The growth response to colchicine treatment is an increase in the rate of growth in diameter and a decrease in the rate of growth in length. Length and diameter are plotted on log scales; the slopes of the curves express relative growth rates (see textbook Chapter 16). Colchicine was added at time zero, and was removed at 24 hours. Note that the average angle of the cellulose microfibrils starts to become less transverse and more random almost immediately after colchicine is added, and it begins to become more transverse immediately after colchicine is removed. However, growth anisotropy does not change until 8 hours after colchicine addition and takes about 8 hours to recover after colchicine removal. (After Taiz et al. 1981.)
|
