Gan Yangying, Zhang Qi, Xiao Chunfen, Ping Jingyao
Institute of Agricultural Economics and Information, Guangdong Academy of Agricultural Sciences/Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China.
The Agro-Biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.
Biology (Basel). 2025 May 17;14(5):562. doi: 10.3390/biology14050562.
Anther is thought to release either bicellular or tricellular pollen when mature. Though a few species had been found to shed both bicellular and tricellular pollen, due to their low frequency, they had been overlooked as special cases of bicellular or tricellular pollen in previous phylogenetic studies. In the present work, the pollen cytologies of 89 species from 26 genera of Annonaceae were observed using the overall transparency method and paraffin sectioning method. The results show that 73 species from 25 genera distribute bicellular pollen, while 16 species from 10 genera shed both bicellular and tricellular pollen. This is the first time that so many species with both types of pollen has been observed in the same family. Combined with reports from other families, the plants that were known to shed both types of pollen included 15 families, 40 genera, and 52 species. Our results indicate that the coexistence of bicellular and tricellular pollen might be the third type of pollen cell number. And the systematic relationship among them is needed to be reanalyzed.
花药成熟时被认为会释放二细胞花粉或三细胞花粉。尽管已发现少数物种会同时释放二细胞花粉和三细胞花粉，但由于其出现频率较低，在以往的系统发育研究中，它们被视为二细胞或三细胞花粉的特殊情况而被忽视。在本研究中，采用整体透明法和石蜡切片法对番荔枝科26个属的89个物种的花粉细胞学进行了观察。结果表明，25个属的73个物种分布有二细胞花粉，而10个属的16个物种同时释放二细胞花粉和三细胞花粉。这是首次在同一科中观察到如此多同时具有两种类型花粉的物种。结合其他科的报道，已知同时释放两种类型花粉的植物包括15个科、40个属和52个物种。我们的结果表明，二细胞花粉和三细胞花粉的共存可能是第三种花粉细胞类型。它们之间的系统关系需要重新分析。
