FORESTRY
SOIL SCIENCE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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abscisic acid
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ethylene
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auxins
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gibberelins
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Detailed explanation-1: -Ethephon is a plant growth regulator used to promote fruit ripening, abscission, flower induction, and other responses.
Detailed explanation-2: -Plants often increase ethylene production in response to stress, and ethylene often is found in high concentrations within cells at the end of a plant’s life. The increased ethylene in leaf tissue in the fall is part of the reason leaves fall off trees. Ethylene also is used to ripen fruit (e.g., green bananas).
Detailed explanation-3: -Abscisic acid (ABA) and ethylene are the major regulators of ripening and senescence in both dry and fleshy fruits, as demonstrated by numerous ripening-defective mutants, effects of exogenous hormone application, and transcriptome analyses.
Detailed explanation-4: -Ethylene. Ethylene is a simple, gaseous plant growth regulator, synthesised by most of the plant organs includes ripening fruits and ageing tissues.
Detailed explanation-5: -The gaseous hormone ethylene plays a key role in plant growth and development, and it is a major regulator of stress responses. It inhibits vegetative growth by restricting cell elongation, mainly through cross-talk with auxins.