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
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.
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.