PLANTS
PLANT RESPONSES TO STIMULI
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cytokines
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Gibberellins
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Cytokinins
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Auxins
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Detailed explanation-1: -Indole-3-acetic acid (IAA) is the major naturally occurring auxin and one of the major growth factors in plants. They were the first group of plant growth hormones discovered.
Detailed explanation-2: -Auxin is the first growth hormone to be discovered in plants. The name ‘auxin’ was coined by F.W. Went in 1928. The name was derived from the Greek word ‘auxein’ which means ‘to grow’.
Detailed explanation-3: -Answer: Auxin promotes cell growth and elongation of the plant.
Detailed explanation-4: -Explanation: Auxin is a first plant hormone which was discovered by Frits Went in the tip of the oats (Avena sativa) coleoptiles.
Detailed explanation-5: -The Dutch biologist Frits Warmolt Went first described auxins and their role in plant growth in the 1920s.