HYPERSENSITIVITY
CYTOKINES
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ascorbic acid
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gibberellins
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auxins
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cytokinins
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Detailed explanation-1: -Cytokinin production slows down the process of senescence. However, accumulation of sugars during senescence, due to the breakdown of accumulated starch or the preferential export of N2 from the leaf, can block the effect of cytokinin, especially in low light.
Detailed explanation-2: -Leaf senescence is an active process involving remobilization of nutrients from senescing leaves to other parts of the plant. Whereas senescence is accompanied by a decline in leaf cytokinin content, supplemental cytokinin delays senescence.
Detailed explanation-3: -Cytokinins delay the senescence of leaves and other organs by controlling protein synthesis and mobilization of resources.
Detailed explanation-4: -Gibberelline Is a plant hormone known to delay senescence, induce parthenocarpy and break dormancy during germination.