When a part of a plant is injured or cut off, the plant shows the function of making up for the injury and restoring coordination, which is called regeneration.
The reason why the branches can take root after cutting is that the cambium and vascular tissue cells in the branches restore their ability to divide, form root primordium, and then develop adventitious roots and form root systems. Root cutting, on the other hand, produces adventitious buds in the cortical parenchyma of roots, and then develops into stems and leaves.
Extended data:
Matters needing attention in willow cutting
Cutting is carried out in early spring, and cutting is a plant from the mother. The adopted cutting branches require excellent varieties, vigorous growth and no pests and diseases. Plants with aging growth should not be selected as cutting mother.
On the same plant, cuttings should choose middle and upper branches, which are full of sunshine. Before germination, cut 2-3-year-old branches and cut them into 15 ~ 17 cm for cutting.
The row spacing of cuttings is 20×30 cm, and the seedlings are vulnerable to weevils, aphids and willow beetles by fully watering the soil, timely budding and weeding, and topdressing for 3 ~ 4 times after rooting.
References:
Willow-Baidu Encyclopedia