Relationships between Flower Opening Time, Environmental Conditions, Corolla Opening Size and Nectar Production in Five Winter Oilseed Rape (Brassica napus L.) Cultivars in China

文献类型： 外文期刊

第一作者： Liu, Ran

作者： Liu, Ran;Wei, Zhijun;Jiang, Yusuo;Liu, Ran;Liang, Cheng;Huang, Yongquan;Ding, Guiling;Huang, Jiaxing

作者机构：

关键词： oilseed rape; nectar volume; sugar concentration; glucose; fructose; temperature

期刊名称：JOURNAL OF APICULTURAL SCIENCE （ 影响因子：0.6； 五年影响因子：1.2 ）

ISSN： 1643-4439

年卷期： 2023 年 67 卷 1 期

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收录情况： SCI

摘要： Oilseed rape is an economically important crop and provides a good nectar resource. In this study, the nectar secretion characteristics of five winter oilseed rape (Brassica napus L.) cultivars in China were examined throughout the daytime. The correlations of corolla opening size, air temperature and relative humidity with nectar production were also determined. Different daily patterns of nectar secretion were detected in flowers opening at different times of the day, and similar trends were observed among cultivars. The nectar volume and nectar sugar concentration in flowers that opened before 9:00 peaked on the first day. The nectar volume of flowers that opened at 11:00 peaked on the second day, and the nectar sugar concentration peaked on the first day. The total nectar yield of flowers opening before 9:00 (4.422-5.265 mu l) was lower than that of flowers opening at 11:00 (7.982-10.646 mu l). The average nectar sugar concentration of flowers opening before 9:00 (18.4-23.3%) was higher than that of flowers opening at 11:00 (15.3-17.5%). The nectar volume was positively correlated with air temperature and relative humidity, while the nectar sugar concentration was positively correlated with air temperature and negatively correlated with relative humidity. The nectar volume and nectar sugar concentration were positively correlated with corolla opening size. The glucose/fructose ratio ranged from 0.89 to 1.44. These results will contribute to a better understanding of the nectar secretion patterns of B. napus L. and will support further studies assessing the melliferous potential of B. napus L. and the temporal dynamics of plant-pollinator interactions.

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