Ch. Moncousin
To understand adventitious rhizogenesis, one needs to describe the biochemical modifications that take place in the cutting, especially in the rooting zone. Being unable to perform precise analysis at the initial cell level, it would have to be done according to cyto-histological modifications from the time of the cutting to the emergence of the first root. BOUILLENNE and WENT (1933) have shown that the presence of a root inhibits the setting-up of other roots. The emergence of the first root is therefore the most direct expression of the rooting capacity of cuttings.

In many publications, even recent ones, the authors seem to ignore that rhizogenesis is split in precise stages: induction, cellular activation, orientation, organization and rooting expression. For each of these, one can distinguish precise cyto-histological and biochemical states, but also varying sensitivities to any external treatment.

In the present publication we have tried to use data collected from the litterature as well as from our laboratories to try and answer the questions on the rooting process.

Moncousin, Ch. (1991). ROOTING OF MICROCUTTINGS : FUNDAMENTAL ASPECTS. Acta Hortic. 289, 311-318
DOI: 10.17660/ActaHortic.1991.289.79

Acta Horticulturae