A) Delay leaf senescence
B) Promote stomatal closing
C) Cause leaf abscission
D) Promote seed dormancy
Correct Answer: A
Solution :
Richmond and Lang (1967) observed that degradation of proteins and chlorophyll was delayed in the detached leaves of Xanthium, if there was cytokinin in the medium. This phenomenon of delay in senescence by cytokinin treatment is called Richmond-Lang effect.
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