Effect of Elicitor Treatments on Quality Attributes in Blueberry: Implications of Cultivar and Environmental Conditions
Articolo
Data di Pubblicazione:
2024
Citazione:
Effect of Elicitor Treatments on Quality Attributes in Blueberry: Implications of Cultivar and Environmental Conditions / G. Cola, B. Cavenago, C. Gardana, A. Spinardi. - In: PLANTS. - ISSN 2223-7747. - 13:8(2024 Apr 15), pp. 1105.1-1105.30. [10.3390/plants13081105]
Abstract:
Elicitors of plant defence responses can trigger defence mechanisms that are able to protect
plant tissues from biotic or abiotic stresses. Since one defence response involves the activation of
secondary metabolites’ biosynthesis, the purpose of this study was to evaluate the effect of chitosan
and melatonin pre-harvest treatments on the quality and the nutritional parameters of the fruits of
blueberry (Vaccinium corymbosum L.). Across the two years of experiment, three different cultivars
(cv.s. ‘Cosmopolitan’, ‘Hortblue Poppins’ and ‘Legacy’) were treated with 1% chitosan or 100 μM
melatonin every two weeks during the ripening season and ripe fruits were progressively harvested
and analysed. The treatment with both elicitors had only slight effects on dry matter, soluble solids
content, titratable acidity and pH, with a cultivar-dependent response. On the other hand, elicitors
significantly affected the levels of phenylpropanoid and antioxidant compounds in all cvs. in both
years, with a higher accumulation of total anthocyanins and phenolics and the enhancement of the
antioxidant capacity, with positive effects on the nutraceutical quality of fruits. The anthocyanin
profile in terms of both absolute concentrations and the relative proportion of single anthocyanins
was affected by both harvest year and cv., highlighting the role of the genetic background in the
plant response to environmental conditions (with particular reference to summer heat stress) and to
elicitor treatments.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
chitosan; melatonin; southern highbush; northern highbush; phenolic compounds;
Elenco autori:
G. Cola, B. Cavenago, C. Gardana, A. Spinardi
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