BIOLOGY
HORMONES
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Auxin
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Gibberellin
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Ethylene
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Cytokinin
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Detailed explanation-1: -Ethylene is regarded as a multifunctional phytohormone that regulates both growth, and senescence. It promotes or inhibits growth and senescence processes depending on its concentration, timing of application, and the plant species.
Detailed explanation-2: -Abscisic acid is a plant growth inhibitor.
Detailed explanation-3: -Growth Hormones. Auxins and cytokinins are major growth promoters and morphogens (Table 3-7, Fig. 3-12). Auxin, or indoleacetic acid, is synthesized in young leaves and in developing seeds from the amino acid tryptophan.
Detailed explanation-4: -The gaseous plant hormone ethylene modulates many internal processes and growth responses to environmental stimuli. Ethylene has long been recognized as a growth inhibitor, but evidence is accumulating that ethylene can also promote growth.