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<p>The present study dynamically monitored the fruit quality characteristics and sugar metabolism as indexes of the ripeness of low-chill pear varieties during on-tree storage for 15 days. The fruit firmness, acidity, pectin content and phenolic compounds had the highest values on stage S-I (0&#xa0;day of on-tree storage) in all tested low-chill pear varieties, and declined with the progress of on-tree storage. While the fruit weight and total soluble solids exhibited the highest values on stage S-IV (15 days of on-tree storage). At the last stage of harvest, ‘Patharnakh’ pear exhibited a slower decline in firmness and titratable acidity (TA) as compared to ‘Ya Li’, ‘Nijisseiki’ and ‘Keiffer’ varieties. Similarly, ‘Patharnakh’ variety showed highest antioxidant activity (DPPH activity) (29.8%), total phenolic content (TPC) (350.2&#xa0;mg GAE kg<sup>− 1</sup> FW), total flavonoid content (TFC) (459.2&#xa0;mg RE kg<sup>− 1</sup> FW), pectin (2.12 mg g<sup>− 1</sup>), soluble solid content (TSS) (12.9%), acid invertase (AI) (0.15 µmol/min mg protein) sorbitol oxidase (SOX) (0.24 nmol/min mg protein), and sorbitol dehydrogenase (SDH) (0.63 nmol/min mg protein). Among all tested pear varieties, ‘Patharnakh’ can retain superior quality characteristics during on-tree storage better than other tested varieties.</p>

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Effect of on-tree storage on ripening related changes and sugar metabolism in fruits of different low-chill pear varieties

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • Akshita Jalota,
  • Mandeep Singh,
  • P. P. S. Gill,
  • S. K. Grewal,
  • Ajay Kamboj

摘要

The present study dynamically monitored the fruit quality characteristics and sugar metabolism as indexes of the ripeness of low-chill pear varieties during on-tree storage for 15 days. The fruit firmness, acidity, pectin content and phenolic compounds had the highest values on stage S-I (0 day of on-tree storage) in all tested low-chill pear varieties, and declined with the progress of on-tree storage. While the fruit weight and total soluble solids exhibited the highest values on stage S-IV (15 days of on-tree storage). At the last stage of harvest, ‘Patharnakh’ pear exhibited a slower decline in firmness and titratable acidity (TA) as compared to ‘Ya Li’, ‘Nijisseiki’ and ‘Keiffer’ varieties. Similarly, ‘Patharnakh’ variety showed highest antioxidant activity (DPPH activity) (29.8%), total phenolic content (TPC) (350.2 mg GAE kg− 1 FW), total flavonoid content (TFC) (459.2 mg RE kg− 1 FW), pectin (2.12 mg g− 1), soluble solid content (TSS) (12.9%), acid invertase (AI) (0.15 µmol/min mg protein) sorbitol oxidase (SOX) (0.24 nmol/min mg protein), and sorbitol dehydrogenase (SDH) (0.63 nmol/min mg protein). Among all tested pear varieties, ‘Patharnakh’ can retain superior quality characteristics during on-tree storage better than other tested varieties.