胡萝卜贮藏期间β-胡萝卜素含量的动态研究

Dynamic Research on β-Carotene Content of Carrots During Postharvest Storage

对４ 个 品种的胡 萝卜（ 新 黑田五寸 人参、 Ｈ Ｅ Ｒ Ｔ Ａ Ｇ Ｅ、 Ｘ Ｐ Ｈ３９１０ 和 Ｔ Ｅ Ｂ Ｅ） 进 行贮 藏期 间干物质和 β胡萝 卜素动态 研究。结 果表明， 贮藏期间 干物质 含量（ 干／ 鲜） 呈下降 趋势。β胡 萝卜 素含量的变 化受贮 藏温度的 影响，呈 现四个阶 段：第一 阶段温度 降低，肉 质根进入 休眠状 态，β胡萝 卜素含量略 有下降 ；第二阶段 温度稳 定，肉 质 根 处于 休 眠 状态 ，β胡 萝卜 素 含 量稳 定； 第 三阶 段 温 度回升，生理 休眠打 破，β胡萝卜 素含量剧 增，其增 加量可 达一 倍 以上； 第四 阶 段温 度 缓慢 升高 ，嫩 芽不断生长 ，β胡萝卜素 含量开 始降低。

Dynamic changes of β Carotene and dry matter content of four carrot varieties (Xinheitan,HERTACE,XPH3910 and TEBE)were studied during postharvest storage.The experiment revealed that the dry matter content(dry/fresh)decreased constantly and the β Carotene content was subject to the changed of temperature during storage.There were four phases in the whole stage.At the first phase,with temperature dropping,fleshy roots entered dormant period,and β Carotene content decreased slightly;at the second stage,with lower stable temperature,fleshy roots remained in the dormant period and β Carotene content changed very slightly;at the third stage when temperature went up again,the dormancy was broken and β Carotene content went up more than doubled,at the fourth stage,with temperature going up slowly,the tender shoots grew continuously and β Carotene content began to go down.