Toledo-Guerrero Jose David, Álvarez Maria Dolores, Herranz Beatriz, Escribano M Isabel, Merodio Carmen, Romero Irene, Sanchez-Ballesta M Teresa
Department of Characterization, Quality and Safety, Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), Jose Antonio Novais 6, 28040 Madrid, Spain.
Department of Food Technology, Veterinary Faculty, Complutense University, Avda/Puerta de Hierro, s/n, 28040 Madrid, Spain.
Plants (Basel). 2024 Dec 3;13(23):3398. doi: 10.3390/plants13233398.
The global demand for blueberries has increased due to their health benefits, but postharvest losses, particularly firmness loss and decay, present significant challenges. This study evaluated the effects of high CO concentrations (15% and 20%) applied for 3 d at 1.0 °C on highbush (cv. 'Duke') and rabbiteye (cv. 'Ochlockonee') blueberries, with a focus on quality maintenance during cold storage. The quality parameters evaluated included titratable acidity, pH, total soluble solids, weight loss, and decay. The effect of gaseous treatments on firmness was analyzed using mechanical parameters and the expression of genes related to cell wall integrity (, , , , , and ). Treatment efficacy varied between species. High CO levels reduced decay in both cultivars, but only the highbush cultivar ('Duke') showed improvements in firmness. In 'Duke', CO treatments affected the expression of , , and , while the role of and in maintaining firmness was minimal, with no significant differences between treatments. In 'Ochlockonee', CO effectively reduced weight loss but did not improve firmness. In conclusion, these results highlight the need for tailored postharvest strategies for different blueberry cultivars and suggest that short-term high CO treatments may effectively prolong the postharvest life of highbush blueberries.
由于蓝莓对健康有益，全球对其需求有所增加，但采后损失，尤其是硬度损失和腐烂，带来了重大挑战。本研究评估了在1.0℃下15%和20%的高浓度CO处理3天对高丛蓝莓（品种‘公爵’）和兔眼蓝莓（品种‘奥克洛科尼’）的影响，重点关注冷藏期间的品质维持。评估的品质参数包括可滴定酸度、pH值、总可溶性固形物、重量损失和腐烂情况。使用机械参数以及与细胞壁完整性相关的基因（、、、、和）的表达来分析气体处理对硬度的影响。处理效果因品种而异。高浓度CO降低了两个品种的腐烂率，但只有高丛蓝莓品种（‘公爵’）的硬度有所改善。在‘公爵’中，CO处理影响了、和的表达，而和在维持硬度方面的作用最小，各处理之间无显著差异。在‘奥克洛科尼’中，CO有效减少了重量损失，但没有改善硬度。总之，这些结果凸显了针对不同蓝莓品种制定采后策略的必要性，并表明短期高浓度CO处理可能有效延长高丛蓝莓的采后寿命。
