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Plant Diversity ›› 1999, Vol. 21 ›› Issue (02): 1-3.

• 研究论文 •    

国产蔷薇科李亚科的花粉形态

周丽华,韦仲新,吴征镒   

  1. 中国科学院昆明植物研究所,昆明650204
  • 出版日期:1999-04-25 发布日期:1999-04-25

Pollen Morphology of Prunoideae of China(Rosaceae)

ZHOU Li-Hua,WEI Zhong-Xin,WU Zheng-Yi   

  1. Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204
  • Online:1999-04-25 Published:1999-04-25

摘要: 本文报道了国产李亚科(Prunoideae)10属11种植物花粉形态。花粉近球形至长球形,极轴 20.00-44.12um,赤道轴门17.85-36.95um。极面观三裂圆形,赤道面观椭圆形至圆形。具三孔沟,内孔常为长方形。沟较长,两端较窄。但在 Sinoplagiospermum uniflora中除了3孔沟外,还有周孔沟。花粉外壁明显分化为覆盖层和柱状层,在光学显微镜下表面常模糊,扫描电镜下外壁纹饰均为条纹状。抱粉学结合形态学和细胞学证据说明本亚科为一单系发生的类群。Prinsepia utilis 和Sinoplagiospermum uniflora(Prinsepia uniflora)这两个种在花粉特征和外壁纹饰上差异很大,从而支持将 Prinsepia和 Sinopmplagiospermum分别处理为两个属但不支持将广义的Princepia(含Princepia和Sinoplagiospermum)独立为亚科。此外,由于Exochorda的外壁纹饰同Prunoideae中较原始的类群(如 Laurocerasus)相近,结合细胞学和形态学证据,支持将 Exochord移置至Prunoidea之下。

关键词: 花粉形态, 蔷薇科, 李亚科, 系统学研究

Abstract: This paper deals with a systematic study of the grains of the Prunoideae(Rosaceae) including the genera Exochorda,Princepia,Sinoplagiospermum,Amygdalus,Ameniaca,Cerasus,Padus,Laurocerasus,Pygeum and Maddenia in China. In above genera most species have tricolporate pollen grains. In Sinoplagiospermum uniflora ,however a few pollen grains are pericolporate. The shape of pollen grains varies from subspheroidal to prolate and the size varies within(20.00- 44.12)um ×(17.85- 36.95)um. Amb 3-lobed circular in commom. The colpi are usually long but narrow at two ends.

Key words: Pollen morphology, Rosaceae, Prunoideae, Systematic study