Conditioning
Controlled atmosphere modulates avocado cuticle and improves postharvest preservation
A study shows that controlled atmosphere storage with low oxygen and high CO₂ modifies the avocado cuticle matrix and improves postharvest quality reducing physiological disorders and firmness loss depending on cultivar
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Avocado cuticle regulation as a key factor in postharvest preservation
The fruit cuticle acts as a dynamic lipophilic barrier that controls fruit–environment interactions and largely determines postharvest shelf life and quality In avocado this structure is essential for maintaining firmness and preventing physiological disorders and decay during storage
Researchers investigated how controlled atmosphere conditions affect cutin matrix composition and postharvest performance in two avocado cultivars Ardit and Hass subjected to 28 days of cold storage under different oxygen and carbon dioxide combinations followed by a shelf-life period at ambient temperature
Cultivar-specific remodeling of the cutin matrix
GC-MS cuticular analysis revealed strong cultivar-dependent responses In Ardit controlled atmosphere storage led to a marked reduction in total cutin load mainly driven by depletion of long-chain aliphatic monomers
In contrast Hass showed an opposite response under certain conditions with accumulation of phenolic monomers particularly 3,4-dihydroxybenzoic acid indicating a distinct structural remodeling of the cuticular barrier
Effects on firmness and physiological disorders
During shelf life storage conditions prior to commercialization strongly influenced fruit quality
In Ardit high CO₂ (5%) increased tissue breakdown resulting in lower firmness and higher incidence of black bottom and side decay However low oxygen (5%) combined with high CO₂ provided the best overall performance maintaining firmness and reducing disorders
In Hass firmness remained relatively stable across treatments but decay and internal greying were mainly reduced under low oxygen conditions
Cultivar-dependent preservation strategy
The results demonstrate that controlled atmosphere effectiveness depends strongly on cultivar-specific cutin metabolism modulation
Overall low oxygen combined with high CO₂ is most effective for Ardit while Hass benefits primarily from oxygen reduction to maintain postharvest quality and prevent disorders
Source
Kutsher, Y., Manasherova, E., Feygenberg, O., Maurer, D., Alkan, N., & Cohen, H. (2026). Postharvest modulation of the avocado fruit cuticular barrier via controlled atmosphere and shelf-life storage. Postharvest Biology and Technology. ScienceDirect.
