Effects of ambient temperature on flower initiation and flowering in saffron (Crocus sativus L.)

文献类型： 外文期刊

第一作者： Wang, Zhen

作者： Wang, Zhen;Li, Xin;Xu, Junxu;Yang, Zhen;Zhang, Yongchun

作者机构：

关键词： Saffron (Crocus sativus L.); Flower initiation; Flower differentiation; Flowering; Temperature

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2021 年 279 卷

页码：

收录情况： SCI

摘要： Saffron is one of the most appreciated and expensive spices in the world and serves as a traditional Chinese medicine in China. Shanghai Chongming Island, as the main production area of saffron in China, has formed a unique "two-segment" cultivation mode since the 1980s. The study evaluated the effects of different temperatures and incubation periods on flower initiation and flowering of saffron. From mid-June, corms were placed in a cultivation chamber (w)ithout any substrate under 30 degrees C, -25 degrees C, and -15 degrees C, or 25 degrees C and -15 degrees C for phased constant temperature treatment, or under 25 degrees C, 20 degrees C and 15 degrees C for continuous constant temperature treatment, respectively. The optimal temperature (between 20 and 25 degrees C) compared to the natural temperature can effectively promote the initiation time of flower differentiation and shorten the flower differentiation process. Meanwhile, inappropriate incubation temperature, such as constant temperature at 15 degrees C or 25 degrees C, results in no flower initiation, or flower interruption and atrophy, respectively. In summary, incubation of corms at a slightly high temperature (about 30 degrees C) for 2 similar to 3 weeks, then transfer to a suitable temperature (about 25 degrees C) for 1 similar to 2 months, and final transfer to a lower temperature (about 15 similar to 20 degrees C) for flowering, which is a suitable temperature condition to promote flowering, can induce saffron to enter in its full flowering stage on early October. These results can provide a theoretical basis for indoor environment conditions to regulate saffron flowering under the "two-segment" cultivation model.

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