Study on the Pollen Morphology of 42 Varieties of Bougainvillea

Zhou Qun; Xu Suxia; Wang Zhen

doi:10.11923/j.issn.2095-4050.cjas20190600078

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Journal of Agriculture ›› 2020, Vol. 10 ›› Issue (5) : 48-57. DOI: 10.11923/j.issn.2095-4050.cjas20190600078

Research article

Study on the Pollen Morphology of 42 Varieties of Bougainvillea

Zhou Qun ¹ ,
Xu Suxia ² ,
Wang Zhen ¹

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Abstract

The pollen grain morphology of 42 varieties of Bougainvillea was observed by using electron microscopy. Compared with the published data of the pollen sterility of Bougainvillea, the relationship between pollen grain morphology and pollen sterility was studied. We collected the pollen of the 42 cultivated species of Bougainvillea and carried out the drying and morphological observation. Pictures of pollen distal view, pollen proximal view and pollen equatorial view under 3000 times and the outer wall of the network under the 10000 times were gathered, to determine the pollen grain morphology of the 42 varieties of Bougainvillea. The size of pollen and the number of germination ditches were measured. The number of buds of different varieties of Bougainvillea and different areas of pollen were compared. It was found that the appearance morphology of Bougainvillea was convex cake structure which was unilateral depression and unilateral protruding. The pollen grains of different varieties of Bougainvillea were 21.64-31.14 μm. There were three germination ditches in a few varieties and most of the varieties had less than three germination ditches. There were a lot of reticulate folds on the surface. The number of buds on the folds was different in different varieties and the number of buds was closely related to the pollen sterility. The number of pollen surface buds of varieties with high pollen sterility was higher than that with low pollen sterility. The low number of pollen surface buds in hybrid varieties could reduce the attachment ability of pollen and cause low pollen sterility.

Key words

Bougainvillea / Pollen Morphology / Electron Microscopy / Pollen Sterility

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Zhou Qun , Xu Suxia , Wang Zhen. Study on the Pollen Morphology of 42 Varieties of Bougainvillea[J]. Journal of Agriculture. 2020, 10(5): 48-57 https://doi.org/10.11923/j.issn.2095-4050.cjas20190600078

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本文在光镜和扫描电镜下观察了麝香系、亚洲系与东方系百合品种花粉的微观形态.麝香系百合的花粉浅黄色、花粉粒纺锤形、网脊带状,亚洲系百合花粉棕黄色或橙红色、花粉粒纺锤形、网脊瘤状,东方系百合的花粉黄色、花粉粒椭圆形、网脊盘珠状.利用花粉微观形态资料,采用多元统计分析(聚类分析)方法研究了品种间的亲缘关系,将3个杂种系的品种得到了正确的归类,系间的亲缘关系表现为亚洲系与东方系的较近.

Footnotes

The authors have declared that no competing interests exist.

作者已声明无竞争性利益关系。

Funding

(3502Z20144074)

(3502Z20199008)

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