What is called Richmond lang effect?
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The delay of senescence of leaves and other organs of the plants by cytokinins is called Richmond - Lang effect.
Explanation
Cytokinin is the plant growth regulator. There are many physiological effects of this hormone. The hormone causes delay in the process of ageing and senescence. This process is called as the Richmond - Lang effect. During this effect, there is prevention of the protein degradation and nutrient immobilisation. The molecules like the chlorophyll pigments in the leaf are not degraded. This prevents the ageing and the falling of the leaves. This effect is brought by the hormone cytokinin.
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