Investigating the involvement of ABA, ABA catabolites and cytokinins in the susceptibility of ‘Nules Clementine’ mandarin to rind breakdown disorder

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dc.contributor.authorMagwaza, Lembe Samukelo
dc.contributor.authorAlamar, M. Carmen
dc.contributor.authorTesfay, Samson Zeray
dc.contributor.authorMditshwa, Asandas
dc.contributor.authorOpara, Umezuruike Linus
dc.contributor.authorTerry, Leon A.
dc.date.accessioned2019-03-15T11:26:36Z
dc.date.available2019-03-15T11:26:36Z
dc.date.issued2019-02-14
dc.description.abstractAbstract BACKGROUND Nules Clementine’ mandarin was used to investigate the potential involvement of endogenous plant hormones in mediating the citrus fruit susceptibility to rind breakdown disorder (RBD). The effect of light exposure (viz. canopy position and bagging treatments) on the endogenous concentration of ABA, 7’hydroxy‐abscisic acid (7‐OH‐ABA), ABA‐glucose ester (ABA‐GE) and dihydrophaseic acid (DPA), and t‐zeatin was tested using four preharvest treatments: outside, outside bagged, inside and inside bagged. Phytohormones concentration was evaluated during 9 weeks of postharvest storage at 8 °C. RESULTS The shaded fruit inside the canopy had the highest RBD score (0.88) at the end of postharvest storage, while sun‐exposed fruit had the lowest score (0.12). Before storage, ABA concentration was lowest (462.8 μg kg‐1) for inside fruit, and highest in outside bagged fruit (680.5 μg kg‐1). Although ABA concentration suddenly increased from the third week, reaching a maximum concentration of 580 μg kg‐1 at week 6 in fruit from inside position, it generally reduced 1.6‐fold ranging from 240.52 to 480.65 μg kg‐1 throughout storage. The increase of 7‐OH‐ABA was more prominent in fruit from inside canopy. Overall, the concentration of ABA‐GE increased 3‐fold with storage time. DPA concentration of bagged fruit from inside canopy position was significantly higher compared to outside fruit. The lower ABA‐GE and higher DPA concentration in inside bagged fruit throughout storage also coincided with higher RBD. CONCLUSION The strong positive correlations between 7‐OH‐ABA, DPA and RBD incidence demonstrated that these ABA catabolites could be used as biomarkers for fruit susceptibility to the disorder.en_UK
dc.identifier.citationMagwaza LS, Alamar MC, Tesfay SZ, et al., (2019) Investigating the involvement of ABA, ABA catabolites and cytokinins in the susceptibility of ‘Nules Clementine’ mandarin to rind breakdown disorder. Journal of the Science of Food and Agriculture, Volume 99, Issue 8, June 2019, pp. 4142-4149en_UK
dc.identifier.issn0022-5142
dc.identifier.urihttps://doi.org/10.1002/jsfa.9644
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/13994
dc.language.isoenen_UK
dc.publisherWileyen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectSenescenceen_UK
dc.subjectrind qualityen_UK
dc.subjectPostharvest stressen_UK
dc.subjectchilling injuryen_UK
dc.titleInvestigating the involvement of ABA, ABA catabolites and cytokinins in the susceptibility of ‘Nules Clementine’ mandarin to rind breakdown disorderen_UK
dc.typeArticleen_UK

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