کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5768145 | 1413213 | 2017 | 5 صفحه PDF | دانلود رایگان |
- First study of the effect of three elicitors application on grape amino acid content
- The treatments, except methyl jasmonate (MeJ), decreased must amino acid content.
- MeJ treatment increased the grape content of Met and Phe.
- Resistance induction by the elicitors, except MeJ, results in physiological costs.
Elicitors play an important role in the defense against pathogens as an alternative to chemical pesticides by increasing secondary metabolites. Their effect on grape amino acid has been little investigated. Thus, the aim of this research was to study the influence of methyl jasmonate (MeJ), chitosan (CHT), and a yeast extract (YE) on grape amino acid composition, through foliar applications to grapevines. The must amino acid concentration was analyzed by HPLC. The results showed that CHT and YE treatments decreased the must concentration of several amino acids, affecting total amino acid content (from 2364 to 1961, and 1818Â mg/L, respectively). However, MeJ treatment had a slight effect on grape amino acid content, increasing the concentration of Met (from 8.95 to 12.13Â mg/L) and Phe (from 7.96 to 9.29Â mg/L). It seems to be that, the resistance induction through CHT and YE treatments results in physiological costs to grapevines associated with a decrease on grape amino acid concentration. Consequently, MeJ applications, as a viticultural practice, could be a better tool than CHT and YE treatments, because did not affect grape amino acid concentration.
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Journal: Food Research International - Volume 99, Part 1, September 2017, Pages 688-692