Dynamics of bioactive compounds and antioxidant activity in peel and pulp of loquat (Eriobotrya japonica) cultivars during fruit development

JAKKULA  RADHIKA; HARSIMRAT KAUR  BONS

doi:10.56093/ijas.v96i7.173606

Authors

JAKKULA RADHIKA Punjab Agricultural University, Ludhiana, Punjab 141 004, India
HARSIMRAT KAUR BONS Punjab Agricultural University, Ludhiana, Punjab 141 004, India

https://doi.org/10.56093/ijas.v96i7.173606

Keywords:

Carotenoids, Days after fruit set, Fruit developmental stages, Phenolics

Abstract

Loquat [Eriobotrya japonica (Thunb) Lindl.] is an excellent source of phyto-chemical and natural antioxidants that prevents oxidative damage and reduces incidence of chronic diseases. An investigation was conducted to assess antioxidant properties in peel as well as pulp of three loquat cultivars (Tanaka, Golden Yellow and Saharanpur Special) during different developmental stages such as green stage at 60 days after fruit set (DAFS), colour break at 75 DAFS, yellow at 85 DAFS and orange stage at 92 DAFS during two consecutive years 2022 and 2023. The findings revealed that all antioxidant properties were higher in loquat peel as compared to pulp. Ascorbic acid, total phenolic, and flavonoid contents attained their highest levels at 60 DAFS (green stage) and gradually declined with advancing fruit maturity. Furthermore, at maturity compared to orange stage, yellow stage exhibited maximum values in both peel and pulp. Total carotenoid content was recorded maximum at orange stage in both peel and pulp while antioxidant activity was maximum at orange stage in pulp only. Cultivar Tanaka exhibited highest antioxidant activities (DPPH activity) while Saharanpur Special showed maximum total flavonoid and phenolic content both in peel and pulp at orange stage, and Golden Yellow exhibited maximum total carotenoids in both peel and pulp at orange stage. The peels of loquat cultivars were found to be rich source of bioactive components which can be helpful for nutraceutical industry and crop improvement programmes.

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