6-苄氨基腺嘌呤处理改善采后青莲子冷藏贮藏品质

6-Benzylaminopurine Improves the Quality of Harvested Green Lotus Seed Storage at Refrigerated Temperature

摘要:

以“太空莲36号”品种的青莲子为试材，采用75 mg/L和175 mg/L 6-BA对青莲子进行浸泡处理并置于4 ℃条件下冷藏，分析测定处理后青莲子品质及相关生理指标，探索6-苄氨基腺嘌呤（6-BA）处理对采后青莲子生理及品质的影响。结果表明，175 mg/L 6-BA浸泡可减缓青莲子在贮藏过程中的失重率，减少莲籽仁中总可溶性固形物的损失，有利于保持青莲子的良好品质。此外，175 mg/L 6-BA浸泡可推迟青莲子在贮藏过程中褐变发生的时间，与对照组青莲子对比知，175 mg/L 6-BA处理组青莲子皮和莲籽仁的褐变发生时间分别推迟了3 d和6 d。6-BA浸泡处理可延缓青莲子皮中丙二醛（malondialdehyde，MDA）含量的升高，同时抑制青莲子皮中多酚氧化酶（polyphenol oxidase，PPO）的活性和呼吸速率。与对照组相比，6-BA处理使苯丙氨酸裂解酶（phenylalanine aminotransferase，PAL）活性高峰的出现时间推迟了3 d。浓度为175 mg/L 6-BA处理可抑制青莲子的衰老进程，有利于保持果实品质，提高贮藏效果。

Abstract:

Space Lotus No. 36' green lotus seed was chosen as test materials. Their quality and physiological indices were measured after green lotus seed immersed in 75 mg/L and 175 mg/L 6-BA respectively and stored at 4 ℃. The results showed that 175 mg/L 6-BA can alleviate the weight loss rate of green lotus seed during storage and reduce the loss of total soluble solids (TTS) in green lotus seed nut. 175 mg/L 6-BA can delay the brown time of green lotus seed during storage. The brown time of green lotus seed and green lotus seed nut was delayed by 3 days and 6 days, respectively. In addition, 6-BA treatment can delay the increase of malondialdehyde (MDA) content and inhibit the activity of polyphenol oxidase (PPO) and respiration rate in green lotus seed peel. The peak of activities of PAL in green lotus seed peel was delayed by 3 days in 175 mg/L 6-BA treatment group. The 175 mg/L 6-BA treatment can inhibit the aging process of green lotus seed, which is beneficial to maintain fruit quality and improve storage.