DENDROLOGY AND SOCIETY
FAMILIES OF ANGIOSPERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the name of the hormone that helps the plant in root initiation, leaf abscission and cell expansion?
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Gibblerin
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Auxin
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Ethylene
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Cytokins
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Explanation:
Detailed explanation-1: -Abscisic acid (ABA) causes the abscission (dropping) leaves.
Detailed explanation-2: -Auxins, cytokinins, and gibberellins delay abscission; ABA and ethylene commonly accelerate abscission. Growing leaves with high levels of auxins, cytokinins, and gibberellins do not abscise, but when levels of these hormones decrease, the leaves begin to senesce and eventually abscise.
Detailed explanation-3: -Ethylene (plant hormone responsible for ripening and senescence), Abscisic acid-ABA (stress hormone), and Auxin (growth hormone) all play a symphony and cause ‘Abscission-falling/separation of leaf tissue’ from the plant.
There is 1 question to complete.