Change in function of apica/ meristem分生组织 vegetative apex LOwering shoot apex flowering is initiated by the changes of a vegetative shoot apex shoot apical Floral bud Floral 顶端 to a flowering meristem tesf Shoot apical shoot apexChange in function of apical meristem分生组织 Flowering is initiated by the changes of a vegetative shoot apex 顶端 to a flowering shoot apex