Accumulation of All-trans-β-carotene and Its 9-cis and 13-cis Stereoisomers during Postharvest Ripening of Nine Thai Mango Cultivars

Abstract

Accumulation of beta-carotene during postharvest ripening of nine Thai mango cultivars was assessed after verifying extraction and high-performance liquid chromatographic quantification of the beta-carotene stereoisomers for this sample matrix. No relevant trans-cis isomerization was induced by the analytical procedure. The vitamin A potential of mangoes was evaluated at different ripening stages unequivocally defined by a ripening index (RPIWB). Being rather stable throughout postharvest ripening, the cultivar-specific proportion of cis-beta-carotene isomers ranged from 14 to 40% of the total beta-carotene content. Subjected to the same postharvest ripening conditions, only the cultivars Kaew, Maha Chanok, Chok Anan, and Nam Dokmai #4 developed a bright yellow-orange mesocarp coloration at their fully ripe stage (RPIWB = 1.5-1.8, sugar-acid ratio approximately 50), resulting in total beta-carotene contents of 6544-11249 microg/100 g mesocarp dry weight (DW) and vitamin A values of 892-1573 retinol equivalents (RE)/100 g DW. Contrarily, poor-colored cultivars Mon Duen Gao, Rad, Kiew Sawoei, Okrong Kiew, and Okrong Thong reached total beta-carotene contents of 1019-2195 microg/100 g DW and vitamin A values of 136-298 RE/100 g DW at comparable sugar-acid ratios. Exponential development of mesocarp color (hue angle, H degrees ) and all-trans-beta-carotene levels, respectively, with RPIWB was described for each cultivar, allowing good prediction of mesocarp color and vitamin A value at consumption ripeness.

Prevention of Chilling Injury in 'Tommy Atkins' Mangoes Previously Stored at 5 ºc, Using Heat Treatment and Radiation Uv (Uv-C)

“…the variables Chroma_peel and antioxidant activity (b-carotene) in the pulp were correlated with each other and inversely related to chilling injury. these results indicate that pigment synthesis in the peel is directly related to the antioxidant protective capacity of b-carotene in the pulp (VÁSqueZ-CAiCedo et al, 2005). As chilling injury worsens, the antioxidant activity in the pulp is also impaired.…”

Physio-chemical properties and pigment changes in the pericarp of mango cultivars during storage and ripening

“…At maturity, carotenoids are typically absent as the mesocarp is hard and cream in colour; while chlorophyll is restricted to the fruit surface. Mango has been studied for ascorbic acid (RoblesSanchez 2009; Valente 2011), carotenoids (Chen 2004;Mercadante 1997;Pott 2003;VasquezCaicedo 2005;Vasquez-Caicedo 2007), antioxidant enzyme Singh 2012), but data regarding the physio chemical attributes and its associated changes in the pericarp pigments changes of mango commercial cultivars of north India are limited. Therefore, the objective of this study was to quantify the physio-chemical attributes and associated pigments changes in the pericarp of commercial mango cultivars during storage and ripening.…”

Influence of Ripening Agent(S) on Post-Harvest Physiology and Enzymatic Activity of Mango (Mangifera indica) cv. Dashehari

“…Physiological Loss In Weight (%) by measuring initial and final weight, Moisture (%)AOAC (1980), Firmness (Newton) by Texture Analyzer, Respiration Rate (ml Co 2 kg -1 h -1 ) by Head Space Gas Analyzer, Ethylene Production (ppm) by Ethylene Analyzer, Ripening Index (%) Va"sqez- Caicedo et al, (2005), Polygalacturonase (PG) (µgPGN min -1 ) Zainon and Brady (1982), Pectin methyl esterase (PME) (A 620 min -1 ) Hagerman and Austin (1986) Results and Discussion…”