Cold Plasma Pretreatment Extends Lily Bulb Shelf Life by Sixty Days Through Microbial Suppression and Enhanced Antioxidant Defense

New research shows corona discharge plasma extends lily bulb shelf life by 60 days, offering a chemical-free alternative for sustainable food preservation.

By: AXL Media

Published: Apr 3, 2026, 10:56 AM EDT

Source: Information for this report was sourced from EurekAlert!

Plasma Innovation Targets Post-Harvest Spoilage in Horticultural Chains

The application of corona discharge plasma represents a significant shift in how high-value horticultural crops are preserved after harvest. By exposing lily bulbs to this non-thermal technology, scientists have found a way to combat the rapid quality loss typically caused by high moisture levels and active metabolic rates. This method serves as a sophisticated alternative to traditional chemical fumigation or synthetic coatings, which often leave behind undesirable residues or fail to provide uniform protection across the surface of the produce.

Scientific Framework of the Corona Discharge Plasma Study

A research team led by Jun Wang and Zhengshi Chang implemented a rigorous testing protocol to determine the optimal duration for plasma exposure. Freshly harvested bulbs were subjected to treatments ranging from two to ten minutes before being moved into cold storage at 4 degrees Celsius for a duration of sixty days. According to the findings published in Food Innovation and Advances, the study monitored a wide array of quality markers, including tissue firmness, enzymatic activity, and cellular integrity, to ensure a comprehensive understanding of how the plasma interacts with the biological structure of the plant.

Microbial Suppression and the Preservation of Tissue Firmness

The most immediate impact of the treatment was observed in the dramatic reduction of surface contaminants, including bacteria, molds, and yeasts. Specifically, a six-minute exposure period resulted in a sterilization rate of more than 78 percent at the start of the storage cycle, an effect that persisted even as the two-month mark approached. Beyond mere cleanliness, the plasma treatment played a critical role in maintaining the physical structure of the bulbs. While untreated control groups suffered from significant softening and decay, those treated for four minutes remained 30 percent harder, effectively slowing the physiological aging process that typically ruins fresh produce.