Impact of grafting on sensory profle of tomato landraces in conventional and organic management systems
2018
Joan Casals, Miquel Agusti Foundation, Campus del Baix Llobregat, Spain | Aurora Rull, Miquel Agusti Foundation, Campus del Baix Llobregat, Spain | Mauro Bernal, Miquel Agusti Foundation, Campus del Baix Llobregat, Spain | Ramiro Gonzalez, Miquel Agusti Foundation, Campus del Baix Llobregat, Spain | Roser Romero del Castillo, Miquel Agusti Foundation, Campus del Baix Llobregat, Spain | Joan Simo, Miquel Agusti Foundation, Campus del Baix Llobregat, Spain
Tomato landrace producers are adopting grafting technology to overcome agronomic defciencies and increase plant yields. Landraces are valued for their higher organoleptic quality, so it is important to assess the impact of grafting on their sensory profle. We studied the infuence of 'Beaufort' rootstock on agronomic, morphologic, and sensory traits using two landraces ('Mando' and 'Montgri') and one commercial cultivar ('Egara') as scions in two extreme management systems for tomato cultivation: conventional/greenhouse and organic/open feld. Panel sensory analysis found that grafting onto 'Beaufort' had a negative efect on sensory attributes, reducing sweetness, acidity, and intensity of favor in the organic system and sweetness and intensity of favor in the conventional system. In conventional management, grafting also modifed some aspects of fruit appearance. In the conventional system, grafting signifcantly increased yield in all the genotypes (mean increase, 52%). By contrast, in the organic system, grafting increased yield only in the 'Mando' landrace (mean increase, 62.3%). As many genotype x grafting interactions afecting many important commercial traits occurred in both management systems, specifc studies with diferent rootstock-scion combinations are highly recommended before adopting this technique for producing landraces with high sensory quality.
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