Abstract
We acknowledge the Coordination for the Improvement of Higher Education Personnel (CAPES) for their financial support.
Highlights
The need for increasing peach adaptation to marginal areas is growing, especially due to adaptation to environmental changes, such as deficit of chilling hours and water
We evaluated combinations that presented or not symptoms of grafting incompatibility and related the occurrence or not of this phenomenon to the levels of cyanogenic glycosides, phenylalanine ammonia-lyase (PAL) activity and concentration of phenolic compounds from cultivar and rootstock of each combination
The results indicate a close relationship between prunasin content and the graft incompatibility phenomenon and suggest that the prunasin content can be utilized as a promising biochemical marker of graft incompatibility between peach and P. mume
Summary
The need for increasing peach adaptation to marginal areas is growing, especially due to adaptation to environmental changes, such as deficit of chilling hours and water. Like peach-almond hybrids (Prunus amygdalus × P. persica) largely used as rootstocks for peach trees in the Mediterranean countries (Mestre et al 2015). Interspecific graft might result in grafting incompatibility, as happens between peach/Japanese apricot (Telles et al 2009), peach/Myrobalan plum (Moreno et al 1993) and peach/nectarine (Zarrouk et al 2006). This phenomenon is associated with disorders in anatomical, genetic, physiological, or biochemical interactions between scion and rootstock. Given the complexity of such interactions, early diagnosis is extremely difficult, and in most cases, no external symptoms are observed for several years (Pina and Errea 2008; Zarrouk et al 2006, Pina et al 2012; Pereira et al 2014a)
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