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Which one of the following pairs, is not correctly matched?
- IAA - Cell wall elogation
- Abscisic acid - Stomatal closure
- Gibberellic acid - Leaf fall
- Cytokinin - Cell division
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Gibberellins are a kind of growth promotery plant growth regulators (PGR). There are more than 100 gibberellins reported from widely different organisms such as fungi and higher plants. They are denoted as GA1, GA2, GA3 and so on. However, gibberellic acid (GA3) was one of the first gibberellins to be discovered and remains the most intensively studied form. All GAs are acidic. They produce a wide range of physiological responses in the plants. Their ability to cause an increase in length of axis is used to increase the length of grapes stalks. Gibberellins, cause fruits like apple to elongate and improve its shape. They also delay senescence of leaves and fruits. Thus, the fruits and leaves can be left on the tree longer so as to extend the market period.Thus, the correct answer is option C.
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Similar Questions
Q1
In the sketch of the stomatal apparatus given alongside, which one of the following is missing?
(1) Cell membranes of the cells
(2) Cell walls of the cells
(3) Nuclei in the guard cells
(4) Chloroplasts in the guard cells
(1) Cell membranes of the cells
(2) Cell walls of the cells
(3) Nuclei in the guard cells
(4) Chloroplasts in the guard cells