Question
Download Solution PDFWhich of the following is a negative senescence regulator?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Cytokinins
Concept:
- Senescence is the process of aging in plants, leading to the death of cells, tissues, or the entire plant. This process is regulated by various plant hormones.
- Negative senescence regulators are substances that delay or inhibit the aging process in plants.
- Cytokinins are a class of plant hormones that play a crucial role in promoting cell division and growth, and they are known to delay senescence.
Explanation:
- Ethylene: This plant hormone is known to promote senescence and ripening in plants. It accelerates the aging process and is not a negative senescence regulator.
- Abscisic acid: Often associated with stress responses in plants, abscisic acid promotes senescence by facilitating leaf drop and dormancy. It does not inhibit the aging process.
- Jasmonic acid: This hormone is involved in plant stress responses and defense mechanisms. It promotes senescence and is not a negative senescence regulator.
- Cytokinins: These hormones are known to delay the aging process by promoting cell division and growth. They inhibit senescence by maintaining chlorophyll and protein levels in plant tissues.
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