枸杞枝条提取物对圣女果的贮藏保鲜效果研究

Research on the preservation effect of extracts from branches of Lycium barbarum on storage of Lycopersicon esculentum var. cerasiforme

中文关键词:  枸杞枝条  提取物  圣女果  采后保鲜

英文关键词:Lycium barbarum branches  extract  Lycopersicon esculentum var. cerasiforme  postharvest preservation

中文摘要:

      目的 探究枸杞枝条提取液对圣女果采后的保鲜效果。方法 以“中宁7号”枸杞枝条为材料, 采用比色法、比浊法等方法, 测定其提取液中活性成分含量及其抗氧化能力、抑菌活性和保鲜作用, 分析枸杞枝条提取液对5℃和20℃贮藏的圣女果的保鲜效果。结果 枸杞枝条提取液中富含黄酮、皂甙和多酚等活性成分, 且具有良好的抗氧化能力和抑菌活性; 枸杞枝条提取液对圣女果具有保鲜作用, 能够显著降低圣女果质量损失率、抗坏血酸、总酸和可溶性固形物含量, 较好地保持果实的色度和硬度, 并有效提高超氧化物歧化酶活性, 延缓果实腐烂变质; 枸杞枝条提取液处理过的圣女果在5℃下可贮藏35 d, 20℃下可贮藏21 d, 与对照组(不做任何处理CK)相比, 将圣女果贮藏期分别延长了14 d和6 d, 同时保持了良好的营养品质。结论 枸杞枝条提取液对圣女果果实具有保鲜作用, 这为延长圣女果贮藏期以及开发天然保鲜剂奠定了理论基础, 同时为枸杞枝条的深度开发和利用提供了新的思路和方向。

英文摘要:

      Objective To investigate the effect of Lycium barbarum branch extract on the freshness preservation of Lycopersicon esculentum var. cerasiforme after harvesting. Methods Taking “Zhongning 7” Lycium barbarum branch as the material, the content of active components, antioxidant capacity, antibacterial activity and fresh-keeping effect of its extract were determined by colorimetry and turbidimetry, and the fresh-keeping effect of Lycium barbarum branch extract on Lycopersicon esculentum var. cerasiforme stored at 5℃ and 20℃ was analyzed. Results The extract of Lycium barbarum branches was rich in flavonoids, saponins and polyphenols, and had good antioxidant capacity and antibacterial activity. The extract of Lycium barbarum branches had a fresh-keeping effect on Lycopersicon esculentum var. cerasiforme, which could significantly reduce the mass loss rate, ascorbic acid, total acid and soluble solid content of Lycopersicon esculentum var. cerasiforme, better maintain the color and hardness of fruits, effectively improve the activity of superoxide dismutase, and delay the deterioration of fruits. The Lycopersicon esculentum var. cerasiforme treated with Lycium barbarum branch extract could be stored for 35 days at 5℃ and 21 days at 20℃. Compared with the control group (CK without any treatment), the storage period of cherry tomatoes was prolonged by 14 days and 6 days respectively, while maintaining good nutritional quality. Conclusion The extract of Lycium barbarum branches has a fresh-keeping effect on Lycopersicon esculentum var. cerasiforme, which lays a theoretical foundation for prolonging the storage period of Lycopersicon esculentum var. cerasiforme and developing natural preservatives, and provides a new idea and direction for the deep development and utilization of Lycium barbarum branches.