The Etiolation is a technique based on the capacity of a vegetal branch in transforming its crust with chloroplasts, able to make the photosynthesis, in crust without chloroplasts, very similar to the crust of the roots, depriving it of the light by means of the positioning of an opaque tape around the part of the branch that we want to etiolate.

This way the transformed crust has greater facility in emitting roots, which allows the clonic reproduction of the plants, specially the very obstinate plants to generate root.

In the nature east phenomenon of spontaneous form when being takes place cover a low branch of tree, shrub or liana by a landslide or the leaves fallen in Autumn . When private being of the light, the buried part undergoes a natural process of etiolation with later emission of roots. This same one happens in the techniques of simple and earthed up layer.



In this image several inferior branches of Mundani tree, Acrocarpus fraxinifolius, been able by the taken root one of a branch directly in the ground, are seen to which them the crust in different parts with newspaper blade has been surrounded covered by sticky tape, to deprive them of the light. One is due to thus make in the branches exposed to the light pave direct, so that the sun does not reheat (it cooks or it burns) the zone to etiolate. The newspaper blade does not let pass the light and its off-white color is not warmed up with the direct sun. After months, between a three minimum of and a maximum of twelve, when clearing the sticky tape and the newspaper blade, the crust is already etiolated. Then the branch below the etiolated zone is cut, put rooting hormones and sowing to him in a flowerpot or its definitive place, since in mundani tree does not work the aerial leaned one, by its strong tendency to auto-pruning of the lowest branches.

In this other image sees a branch of Litchi sinensis surrounded by a black tape. In this case a tape can be put black, because the leaves give shade him and prevent that the sun reheats the zone to etiolate, reason why can be done without the newspaper blade.

Happened between three and twelve months the opaque tape retires and the etiolated crust is observed, already without chloroplasts, with the absorbent surface like the one by the roots and with small points that are the radical sketchs. At this moment two ways can be followed: to make him a layer, method very used by the nurserymen and the teachers of the Bonsai aerial, or to cut the branch below the etiolated zone, to put to him rooting hormones and to seed it in a flowerpot or its definitive place.

In this other image a branch of avocado is seen surrounded by opaque tape sprint.

And here another branch of avocado already etiolated is appraised, after clearing the tape to him to sprint.  In this case ways can be followed such that in the case of the Lichi sinensis:  leaned aerial or it seeds of the branch in flowerpot or its definitive place with rooting hormones.