Aspetti biochimici della disaffinita' d' innesto.
1994
Musacchi S.
In the modern fruit industry the use of rootstock, frequently of different species, is still widespead despite the frequently occurring problem of graft-incompatibility. In such cases there is an impairment of the cambium activity, often followed by necrosis of this tissue. Some models have been proposed to explain this phenomenon. The model developed by Yeoman and Brown (1974) and Jeffrey and Yeoman (1983), involves a cell-cell recognition, and the model, proposed by Moore (1984), does not. Lignification is the most important factor in successful grafting, and the main chemical substances involved in this phenomenon are phenols (coumarins, catechins, and flavanones) and peroxidases. Cyanogenic glycosides (amygdalin and prunasin) are also important factors in graft-incompatibility. These compounds are broken down by beta-glycosidase into two molecules of glucose, one of benzoic aldehyde, and one of hydrocyanic acid. The latter is toxic for cells, which subsequently die.
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