Article

Methyl jasmonate promotes fruit ripening and improves fruit qualityin Japanese plum

Source: OAI
6 Followers
 · 
125 Views
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: a b s t r a c t During ripening fruits undergo several physiological and biochemical modifications that influence quality-related properties, such as texture, color, aroma and taste. We studied the differences in eth-ylene and sugar metabolism between two genetically related Japanese plum cultivars with contrasting ripening behaviors. 'Santa Rosa' (SR) behaved as a typical climacteric fruit, while the bud sport mutant 'Sweet Miriam' (SM) displayed a non-climacteric ripening pattern. SM fruit displayed a delayed ripening that lasted 120 days longer than that of the climacteric fruit. At the full-ripe stage, both cultivars reached similar final size and weight but the non-climacteric fruits were firmer than the climacteric fruits. Fully ripe non-climacteric plum fruits, showed an accumulation of sorbitol that was 2.5 times higher than that of climacteric fruits, and the increase in sorbitol were also par-alleled to an increase in sucrose catabolism. These changes were highly correlated with decreased activity and expression of NAD + -dependent sorbitol dehydrogenase and sorbitol oxidase and increased sorbitol-6-phosphate dehydrogenase activity, suggesting an enhanced sorbitol synthesis in non-climacteric fruits.
    Plant Science 02/2015; 231:30-39. DOI:10.1016/j.plantsci.2014.11.002 · 4.11 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Background: Plum fruits constitute a good source of natural antioxidant substances. Particularly, plums contain large amounts of phenolic compounds and flavonoids having natural antioxidant activity which is effective in human diet. The aim of this study was to evaluate the effects of pre-harvest MeJA treatment on the fruit quality and bioactive compounds of three different Japanese plums under storage conditions. Materials and Methods: The effects of pre-harvest methyl jasmonate treatment (MeJA) on weight loss, color characteristics (L*, C* and h°), firmness, soluble solids content (SSC), titratable acidity (TA), total phenolics (TP) and total antioxidant activity (TAA) of ‘Black Beauty’, ‘Black Amber’ and ‘Fortune’ plum fruits during the cold storage (at 0±0.5 C and 90±5% RH) were investigated in this study. Results: MeJA did not have significant effects on the weight loss (%) of ‘Black Amber’ and ‘Fortune’ fruits, whereas it was effective in delaying the weight loss of ‘Black Beauty’ at the end of storage. The color characteristics of all plum cultivars were not significantly affected by MeJA at the end of storage. In all plum cultivars, the SSC increased, while TA significantly (P<0.05) decreased during storage. TP and TAA of ‘Black Amber’ and ‘Fortune’ fruits significantly increased during the cold storage. MeJA treatments increased fruit firmness, TP and TAA (according to FRAP) of ‘Fortune’ plums at the end of storage. Conclusion: The scientific results about the effects of pre-harvest MeJA treatments on the cold storage of Japanese plums may contribute significant helps to improve plum storage durations and quality characteristics.
    African Journal of Traditional, Complementary and Alternative Medicines 11/2014; 11(6):105-117. DOI:10.4314/ajtcam.v11i6.11 · 0.56 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The effects of pre-harvest methyl jasmonate (MeJA) treatment on ethylene production, respiration rate, bioactive compounds and physico-chemical parameters of plum fruits (Prunus salicina Lindell cvs. ‘Black Beauty’ and ‘Black Amber’) were investigated in this study. Whole trees were sprayed once with an aqueous solution containing MeJA (0 and 2240 mg L-1) two weeks before the anticipated commercial harvest for each cultivar separately. Compared to control treatment, MeJA-treated trees had higher yields. However, fruit mass and geometric mean diameters of MeJA-treated fruits were lower than the fruits of control. Ethylene production and respiration rate were significantly increased with MeJA. MeJA-treated fruits significantly maintained higher flesh firmness, except for initial harvest date. MeJA treatment significantly decreased L* and hue angle of plum fruits. Soluble solids content significantly increased with MeJA treatment and but MeJA treatment reduced titratable acidity. MeJA-treated fruits exhibited higher levels of total antioxidant activity and total phenolics. In all harvest dates, MeJA treatment resulted in significant increases in chlorogenic acid, caffeic acid, rutin, naringenin and kaempferol of ‘Black Beauty’ and chlorogenic acid, caffeic acid, p-coumaric acid, ferulic acid, quercetin and kaempferol of ‘Black Amber’ plums
    Scientia Horticulturae 07/2014; 176(-):162-169. DOI:10.1016/j.scienta.2014.07.007 · 1.50 Impact Factor