leaf abscission is initiated and orchestrated by chaning levels of the plant hormone......
b) abscisic acid
I think it is auxin or absicisic acid. because those of it is talked about hormone.
Absicsic acid is plant hormone involved in dormancy and responses to stress .
Auxin is a plant hormone involved in various aspects of growth and development.
I dont know which one will fix with the question and why?
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Earlier it was though that abscisic acid has a role in it but later it was found that auxins have major role in triggering leaf abscission.
Can you give me for evidence? why leaf abscission have the changing levels of the plant hormone auxin instead of absicisic acid