It translocates both acropetally and basipetally
to the roots or by leaves.
The lamina is compound and leaflet initiation occurs basipetally
1999) reported that in plants in which roots regenerate spontaneously, endogenous auxins produced at the shoot apex are transported basipetally
to the cut surface and act as the trigger, removal of the apex reduces both the level of endogenous auxin in the basal portion of a cutting and the number of regenerated roots.
If auxin is applied to these buds, they fail to grow, proving that they are inhibited by auxin moving basipetally
(downward) from the shoot apex.
Previous studies have shown that the dual promoter of Agrobacterium tumefaciens mannopine synthase (mas) genes is regulated by plant growth hormones, and that the activity of the mas dual promoters increases basipetally
in developing plants; it has also been reported that the apical meristem contains a factor that inhibits stimulation of mas promoter activity (Langridge et al.
Culms are smooth to the touch, and the flag leaf is slightly rough when felt basipetally