Factors affecting carotenoids in zeaxanthin-biofortified sweet-corn (Zea mays L.)

Brenes, Calvo; Georgina, Paula

doi:10.14264/uql.2019.122

Cited by 1 publication

(1 citation statement)

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“…It is possible that many purple maize accessions studied previously [ 7 ] have had little vitreous endosperm present, and the mainly starchy endosperm present does not appear to accumulate anthocyanin. It is also worth commenting that although pericarp colouration could potentially be increased through harvesting later than 25 DAP, eating quality of the kernel would decline after this point, due largely to moisture loss causing shriveling and a chewier texture [ 26 ]. In the present study, the moisture content of ‘Tim’ lines at 25 DAP was within the range of 70–74%, which has been reported previously [ 27 ] as being within the optimum moisture content (70–75%) for sweetcorn harvest.…”

Section: Discussionmentioning

confidence: 99%

Profiling and Quantification of Anthocyanins in Purple-Pericarp Sweetcorn and Purple-Pericarp Maize

2023

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Purple-pericarp sweetcorn accessions, derived from crossing purple-pericarp maize with white shrunken2 sweetcorn, were assessed for differences in anthocyanin profile at both sweetcorn eating stage and at full kernel maturity. The ‘Tim1’ sweetcorn line developed a similar total anthocyanin concentration to its ‘Costa Rica’ parent when assessed at sweetcorn-eating stage. At full maturity it surpassed the purple maize parent, but this was mainly due to the presence of starch diluting the anthocyanin concentration of the latter. The anthocyanin/colour relationship was affected by both total anthocyanin concentration and the ratio of cyanidin- to pelargonidin-based anthocyanins. Malonylation of anthocyanins was also found to vary and did not appear to be linked with either cyanidin:pelargonidin ratio or total anthocyanin concentration. In addition, anthocyanin synthesis was affected by kernel maturity at harvest, with colour development increasing in conjunction with a progression of anthocyanin development across the kernel surface. Pigmentation was present in the aleurone, pericarp and vitreous endosperm of kernels of the purple-pericarp maize parent and purple-pericarp sweetcorn accessions when fully mature, but pigmentation was only apparent in the pericarp at sweetcorn-eating stage. Importantly for consumers, anthocyanin pigmentation covered almost the entire kernel surface at sweetcorn-eating stage.

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Section: Discussionmentioning

confidence: 99%