| 摘要: |
| [目的]探讨采前外源5-氨基乙酰丙酸(ALA)处理对番茄果实品质及采后生理的影响,为ALA在生产中的推广应用及进一步研究提供理论指导.[方法]以"金鹏超冠"番茄品种为试材,采前用ALA(0.06 g/m2)对番茄植株进行叶面喷施处理,以喷清水为对照,研究叶面喷施ALA对番茄果实硬度及相关营养成分含量的影响,以及0～1℃冷藏条件下果实的呼吸速率、硬度、细胞膜相对透性、丙二醛含量和过氧化物酶(POD)、过氧化氢酶(CAT)、超氧化物歧化酶(SOD)活性的变化.[结果]ALA可明显提高果实品质,经ALA处理的番茄果实可溶性固形物含量较对照提高20.9%;果实蛋白质含量提高31.4%;可滴定酸含量显著低于对照,果实固酸比明显提高;但对果实硬度、维生素C含量无明显影响.ALA处理不影响番茄冷藏过程中呼吸高峰出现的时间,但可降低其高峰值,并维持果实硬度;ALA处理降低了MDA含量和细胞膜相对透性,抑制膜脂过氧化程度;ALA处理冷藏后期SOD、POD、CAT活性整体上高于对照,但差异不显著.[结论]采前ALA处理可提高番茄果实的品质,同时不会降低其耐贮性. |
| 关键词: 5-氨基乙酰丙酸(ALA) 番茄果实 果实品质 采后生理 |
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| 基金项目:中日合作项目“ALA在园艺作物上的应用”（14230304） |
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| Effects of 5-aminolevulinic acid on the quality and post harvest physiology of tomato fruit |
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| Abstract: |
| 【Objective】 This research was conducted to study the effects of exogenous 5-aminolevulinic acid(ALA) treatment on the quality and post harvest physiology of tomato fruit to provide theoretical guidance for the development and application of ALA.【Method】 Using‘Jinpeng ultra-crown’tomato as the experimental materatial,using ALA (0.06 g/m2)for foliar application before harvest,spraying water as a control,the effects of 5-aminolevulinic acid on fruit firmness and related nourishment composition content of tomato fruits were studied,such as soluble solid content(SSC),titratable acidity (TA),vitamin C content and protein content.The changes in respiration rate,firmness,the relative membrane permeability,MDA content,SOD,POD and CAT activities of tomatoes under 0-1 ℃ were investigated.【Result】 The results indicated that application of ALA may promote the quality of tomato fruit.Compared with the control,ALA significantly improved the soluble solid content by 20.9%,decreased acid content;protein content of the fruit increased by 31.4%,but no significant effect on the firmness and vitamin C content of fruit.In addition,ALA treatment did not affect the process of the emergence of respiratory peak time,but could reduce the peak and keep the firmness of fruit during cold storage;it could decrease the MDA content and the relative membrane permeability,inhibited the action of lipid peroxidation;but ALA treatment had little influence on SOD，POD and CAT activities.【Conclusion】 ALA treatment before harvest can improve the quality of tomato fruit and will not reduce its storability. |
| Key words: 5-aminolevulinic acid(ALA) tomato quality post harvest physiology |
