Concentrations of constitutive alk(en)ylresorcinols in peel of commercial mango varieties and resistance to postharvest anthracnose

Hassan, M. K., Dann, E. K., Irving, D. E. and Coates, L. M. (2007) Concentrations of constitutive alk(en)ylresorcinols in peel of commercial mango varieties and resistance to postharvest anthracnose. Physiological and Molecular Plant Pathology, 71 4-6: 158-165.


Author Hassan, M. K.
Dann, E. K.
Irving, D. E.
Coates, L. M.
Title Concentrations of constitutive alk(en)ylresorcinols in peel of commercial mango varieties and resistance to postharvest anthracnose
Journal name Physiological and Molecular Plant Pathology   Check publisher's open access policy
ISSN 0885-5765
1096-1178
Publication date 2007-10
Sub-type Article (original research)
DOI 10.1016/j.pmpp.2007.12.005
Volume 71
Issue 4-6
Start page 158
End page 165
Total pages 8
Place of publication London, United Kingdom
Publisher Academic Press
Language eng
Formatted abstract Mature green mango fruits of commercially important varieties were screened to investigate the levels of constitutive antifungal compounds in peel and to assess anthracnose disease after inoculation with Colletotrichum gloeosporioides. High-pressure liquid chromatography was used to quantify the levels of 5-n-heptadecenylresorcinol and 5-n-pentadecylresorcinol in the peel extracts. The fruit peel of the varieties ‘Kensington Pride’ and ‘Keitt’ were observed to have the highest levels of both 5-n-heptadecenylresorcinol (107.3–123.7 and 49.9–61.4 μg/g FW, respectively) and 5-n-pentadecylresorcinol (6.32–7.99 and 3.30–6.05 μg/g FW, respectively), and the fruits of the two varieties were found to have some resistance to postharvest anthracnose. The varieties ‘Kent’, ‘R2E2’, ‘Nam Doc Mai’, ‘Calypso’ and ‘Honey Gold’ contained much lower concentrations of resorcinols in their peel and three of these varieties were found to be more susceptible to anthracnose. Concentrations of 5-n-heptadecenylresorcinol were significantly lower at the ‘sprung’ and ‘eating ripe’ stages of ripening compared to levels at harvest. Concentrations of 5-n-pentadecylresorcinol did not differ significantly across the three stages of ripening. The levels of these two resorcinols were found to be strongly inter-correlated (P<0.01, r2=0.71), with concentrations of 5-n-heptadecenylresorcinol being an average 18 times higher than those of 5-n-pentadecylresorcinol. At the ‘eating ripe’ stage, significant relationships were observed between the concentrations of each type of alk(en)ylresorcinol and anthracnose lesion areas following postharvest inoculation, P<0.001, r2= 0.69 for 5-n-pentadecylresorcinol, and P<0.001, r2= 0.44 for 5-n-heptadecenylresorcinol.
Keyword Mangifera indica
Postharvest
Disease resistance
Antifungal compounds
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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Created: Thu, 03 Sep 2009, 08:58:36 EST by Mr Andrew Martlew on behalf of Qld Alliance for Agriculture and Food Innovation