NEETBiologyPlant Growth and DevelopmentMCQ+4 / −1
Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?
- AGibberellin
- BCytokinin
- CEthylene
- DAbscisic acid
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Correct answer: B
The phytohormone that delays leaf senescence by promoting nutrient mobilization is cytokinin (Option B). Cytokinins
are produced mainly in the roots and transported to the leaves
maintain chlorophyll content and protein synthesis
mobilize nutrients from older tissues to growing parts, thereby postponing senescence
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