Germ is one of the components of plant embryo, which is connected with hypocotyl and located at the top of hypocotyl. It breaks through the seed epidermis and develops into leaves and stems. As far as seedlings (plants that germinate from seeds) are concerned, the germ is the first bud of a plant and is formed during embryogenesis.

Germ is one of the main components of seed plant embryo, and it is the undeveloped root in the lower part of embryo. Its tip is close to the germination hole. When a seed germinates, the radicle usually breaks through the seed coat first and develops into the main root of the seedling. Monocotyledons will become the main roots of plants when they grow up, and their survival time is short, so they will stop growing soon after they are buried in the soil, so there is no obvious main root.

Bacterial growth

Embryo is the first leaf bud of a seedling, which is formed during embryogenesis. At a certain stage of embryo formation, the cell groups at the two poles form meristematic regions of root tip and stem tip respectively, the latter is the growth cone of embryo, and then the local cells at one side of the growth cone divide to form protrusions, that is, Yuan Ye's base.

When the seed germinates, the germ becomes an active bud, forming the first branch of the seedling. At the same time, the axillary bud primordium began to occur, generally at the axil of the third leaf primordium from top to bottom, through cell division to form a protrusion, that is, the growth cone of axillary bud, leaf primordium and axillary bud primordium appeared one after another, becoming well-developed axillary bud (lateral bud) like embryo differentiation.

Axillary buds can be leaf buds, flower buds or mixed buds. If it is an active bud, it will be located at the top of the branch and become the terminal bud of the branch, and the embryo has become the terminal bud of the main stem before this. When some plants enter the reproductive growth stage, some leaf buds can be transformed into flower buds.