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<p>Cutting black is an internal dark gray/black discoloration associated with pressure bruise in potatoes stored in piles, where sustained compression causes flattened areas and enzymatic browning. This defect leads to significant post-harvest losses, particularly affecting the fresh market. This 2-year study evaluated the effects of 1-methylcyclopropene, nitric oxide, and diphenylamine on cutting black development during simulated bulk storage of Russet Burbank potatoes. Tubers were stored at 7.2 °C and 95% relative humidity for 7 months under no pressure or constant downward pressure equivalent to 1.66 m pile height, 1,217.53 and 1,220.32 kg m<sup>2</sup>. Pressure increased the external flattened area (7.7% vs. 0.1%), but no internal discoloration was observed. Electrolyte leakage, polyphenol oxidase, and peroxidase enzymatic activity did not vary significantly with applied pile pressure and treatment, suggesting that pressure bruise-damaged areas might require pile pressures higher than 1,220.32 kg m<sup>2</sup> (1.66 m) for cutting black to develop.</p>

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Pressure Flattening Simulation and Associated Response After Unloading Russet Burbank Potatoes From Storage

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月20日

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  • Pankaj Kumar Yadav,
  • Maiqui Izidoro,
  • Vanessa Maria Dantas Pedrosa,
  • Samuel Paytosh,
  • Jessica Smith,
  • Renata Carneiro,
  • Nora Olsen,
  • Munevver Dogramaci,
  • Gustavo Henrique de Almeida Teixeira

摘要

Cutting black is an internal dark gray/black discoloration associated with pressure bruise in potatoes stored in piles, where sustained compression causes flattened areas and enzymatic browning. This defect leads to significant post-harvest losses, particularly affecting the fresh market. This 2-year study evaluated the effects of 1-methylcyclopropene, nitric oxide, and diphenylamine on cutting black development during simulated bulk storage of Russet Burbank potatoes. Tubers were stored at 7.2 °C and 95% relative humidity for 7 months under no pressure or constant downward pressure equivalent to 1.66 m pile height, 1,217.53 and 1,220.32 kg m2. Pressure increased the external flattened area (7.7% vs. 0.1%), but no internal discoloration was observed. Electrolyte leakage, polyphenol oxidase, and peroxidase enzymatic activity did not vary significantly with applied pile pressure and treatment, suggesting that pressure bruise-damaged areas might require pile pressures higher than 1,220.32 kg m2 (1.66 m) for cutting black to develop.