Leaf abscission is caused by

Leaf abscission is promoted by

Leaf abscission is promoted by

Leaf abscission is promoted by

Leaf abscission is prevented by

Leaf abscission is brought about by

Leaf abscission is brought about by

Leaf abscission is prevented by

Leaf abscission is prevented by

Removal of auxin source demonstrates that leaf abscission is _______by auxin, and apical dominance is________by auxin.

Removal of auxin source demonstrates that leaf abscission is _______by auxin, and apical dominance is________by auxin.