Indução De Resistência E Qualidade Pós-Colheita De Amora-Preta Tratada Com Ácido Salicílico

Abstract

INDUCTION OF RESISTANCE AND POST-HARVEST QUALITY OF BLACKBERRY TREATED WITH SALICYLIC ACIDABSTRACT -the objective of this study was to evaluate the effect of the elicitor salicylic acid (Sa) applied in post-harvest blackberry on conservation and the induction of resistance. Blackberry cultivar tupy fruits were harvested, selected and subjected to treatment with different concentrations of Sa (0.5, 1.0, 1.5 and 2.0 mm) and control (distilled water). We used a completely randomized design with four replications of 30 fruits per experimental unit. after 144 hours storage at the temperature of 8 °C, it was evaluated the weight loss, total soluble solids (tSS), titratable acidity (ta), ascorbic acid and the incidence of rottenness. at intervals of 24, 48, 96 and 144 hours fruit samples were withdrew for determination of total protein, anthocyanins, flavonoids and activity of the enzymes: phenylalanine ammonia-lyase (PAL), chitinase and β-1,3-glucanase. There was an increase of protein content and activation of β-1,3-glucanase with the application of SA, demonstrating induction of resistance in fruits by application of SA. The content of anthocyanins and flavonoids, as well as the activity of Pal, had changes during the experiment due to the application of Sa, which demonstrated activation of the phenylpropanoid route for synthesis of secondary metabolites. the treatments of aS did not affect the mass loss, ta, tSS, rot incidence, ascorbic acid and chitinase activity. Index terms: Rubus sp, phenylalanine ammonia lyase, chitinase and β-1,3-glucanase, anthocyanins and flavonoids.

<b>‘Navelina’ oranges submitted to pre-harvest resistance inducers

“…The ASM and MeJa resistance inducer treatments differed from the control after 30 days of refrigerated storage with subsequent simulation of commercialization time (7 days at 20 ± 1°C) (Table 4). In another study, the application of salicylic acid activated the synthesis of secondary metabolites, promoters of systemic resistance; however, it did not affect the biomass loss of fresh fruit (Borsatti, Mazaro, Danner, Nava, & Dalacosta, 2015), which corroborates the results of this work.…”

Effect of maturation stage on the physical, chemical and biochemical composition of black mulberry

“…A reduction was observed in the respiratory rate of black mulberry with the maturation advance (Table 1), a respiratory peak not being noticed, characteristic of climacteric fruits. In fact, the black mulberry is considered a non-climacteric fruit (Borsatti, Mazaro, Danner, Nava, & Dalacosta, 2015). Wills, Mcglasson, Graham and Joyce (2007) state that in nonclimacteric fruits respiration decreases during maturation and biochemical transformations, which make the fruit mature, occur more slowly.…”

Elicitors on the control of anthracnose and post-harvest quality in papaya fruits1

“…Alamino et al (2013) used elicitors for the control of anthracnose on apples ('Royal Gala' cultivar) and found an increase in the peroxidase activity, as well as reductions in the affected area of the fruit and sporulation of C. gloeosporioides. Borsatti et al (2015) used elicitors on post-harvest blackberries (Rubus spp.) and observed an increase in phenylalanine ammonialyase, as well as a lower incidence of fruit rot.…”