塔里木大学学报

为探讨枣休眠期间内源激素含量变化与休眠的关系,以不同需冷量枣品种‘京枣39’、‘伏脆蜜’、‘胎里红’为试材,测定自然越冬和人工低温处理条件下3个枣品种休眠期间内源激素含量变化。结果表明:自然越冬条件下3个枣品种枝条中赤霉素含量变化趋势一致,在休眠诱导期波动性较大,进入和解除休眠后含量变化不大;进入休眠和解除休眠后‘京枣39’枝条中生长素含量显著高于‘伏脆蜜’和‘胎里红’。人工低温处理条件下,3个枣品种枝条中赤霉素、生长素含量变化不同,且波动较大。自然越冬和人工低温处理条件下,3个枣品种枝条中脱落酸含量在休眠诱导期缓慢增加,进入深度休眠后迅速下降,解除休眠后缓慢升高。脱落酸含量变化与枣树休眠进程密切相关,可以作为判断枣树休眠进程的关键物质。

In order to explore the relationship between the changes of endogenous hormone content and dormancy during the dormant period of jujube, three varieties of‘Jingzao 39’,‘Fucuimi’, and‘Tailihong’, which require different cooling capacity, were used as test materials to determine the three varieties under natural overwintering and artificial low-temperature treatment conditions. Changes of endogenous hormone content in jujube varieties during dormancy. The results showed that the gibberellin content in the branches of the three jujube cultivars under natural overwintering conditions had the same trend, with greater fluctuations in the dormancy induction period, and little change in the content after entering and releasing dormancy;‘Jingzao 39’branches after entering and releasing dormancy. The content of auxin in medium was significantly higher than that of‘Fucuimi’and‘Tailihong’. Under artificial low temperature treatment, the contents of gibberellin and auxin in the branches of the three jujube varieties changed differently and fluctuated greatly. Under the conditions of natural overwintering and artificial low temperature treatment, the content of abscisic acid in the branches of the three jujube varieties slowly increased during the dormancy induction period, rapidly decreased after entering deep dormancy, and slowly increased after the dormancy was released. The change of abscisic acid content is closely related to the dormancy process of jujube trees, and can be used as a key substance to judge the dormancy process of jujube.