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Occurrence of Alk(en)ylresorcinols in the Fruits of Two Mango (Mangifera indica L.) Cultivars during On-Tree Maturation and Postharvest Storage

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journal contribution
posted on 08.01.2014, 00:00 by Stefanie Kienzle, Reinhold Carle, Pittaya Sruamsiri, Carola Tosta, Sybille Neidhart
Regarding their relevance for the fungal resistance of mangoes in long supply chains, the alk­(en)­ylresorcinols (AR) were quantitated in peel and mesocarp throughout storage (27 days, 14 °C, ethylene absorption). The 12 ‘Chok Anan’ and 11 ‘Nam Dokmai #4’ lots picked between 83 and 115 days after full bloom (DAFB) had different harvest maturity indices. The development of dry matter and fruit growth indicated physiological maturity ∼100 DAFB. During storage, all fruits ripened slowly, mostly until over-ripeness and visible decay. The total AR contents always ranged at 73 ± 4.5 and 6.4 ± 0.7 mg hg–1 of ‘Chok Anan’ and ‘Nam Dokmai #4’ peel dry weight, respectively, but only at 6.7 ± 0.7 and 0.9 ± 0.1 mg hg–1 for the corresponding mesocarp (P ≤ 0.05). These narrow concentration ranges were contradictory to the decreasing fungal resistance. Accordingly, the alk­(en)­ylresorcinols have not been a deciding factor for the fungal resistance.