Shoot cultures are the most common micropropagation methods.

Shoot cultures can be regenerate plantlets by either axillary or adventitious methods.

Photo of a shoot culture.

Axillary shoots come from buds formed at each node.

Illustration showing axillary shoots forming from the shoot tip and axillary nodes of a shoot.

Photo of developing shoot cultures in growing medium.

Axillary shoots arising from each node.

Adventitous shoots arise from callus, or plant pieces lacking a node such as leaf discs or flower stems.

Illustration showing adventiious shoots developing from an internode piece of stem, or from a leaf disk.

Close up photo of adventitious shoots growing from a poplar internode.

Adventitious shoots from a poplar internode.