org/confluence/download/attachments/48170163/L jpg?version- 1&modification; Date

Question

org/confluence/download/attachments/48170163/L jpg?version- 1&modification; Date 1326741249000 White potatoes are modified stems that are adapted for the storage of starch. The lateral buds (eyes) found on potatoes will not usually sprout while the potato is attached to the stem. After the potatoes are harvested, the terminal "eye" will sprout if the potatoes are stored in a warm, dark place. If the terminal sprout is removed or damaged, the lateral eyes will produce shoots Which of the following explains this phenomenon? 9 a. The terminal eye exerts apical dominance and when it is damaged the lateral buds are able to grow because the level of transported auxin is reduced. b. Because the potato grows underground, lateral roots will grow from the eyes when exposed to increased auxin concentrations c. The ethylene produced by the damaged terminal eye inhibits the growth of the other eyes. d. Like some seeds, the eyes require light to produce shoots.

Explanation / Answer

Option "a" is the correct answer.

Usually, it is the apical eye that sprouts first. This apical dominance suppresses sprouting in the lateral eyes. However, if apical sprout/eye is removed or damaged, this apical dominance is lost and every eye of the potato sprout equally well.

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