Cut leaves remain green for longer time if dipped in
A
Auxins
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B
Cytokinins
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C
Ethylene
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D
Gibberellins
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Solution
The correct option is B Cytokinins Cytokinins delay senescence (ageing) so chrolophyll will be retained and leaves will remain green for longer time. Cytokinins (CK) are a class of plant growth substances (phytohormones) that promote cell division, or cytokinesis, in plant roots and shoots. They are involved primarily in cell growth and differentiation, but also affect apical dominance, axillary bud growth, and leaf senescence.