| 摘要: |
| 西畴重楼(Paris cronquistii var. xichouensis)为云南省特有物种,野外调查发现了广西(田林、那坡)的省级新分布,针对该新分布居群,观测并描述西畴重楼植物形态学特征,记录物候学特征,野外观测其地理分布特征,综上对其生物学特性进行补述,并结合前人基于细胞核ITS、叶绿体psbA-trnH和trnL-trnF等序列的分子系统学研究结果探讨其系统关系。结果表明:西畴重楼叶背面无紫色斑块,花瓣较宽而显著区别于凌云重楼(P. cromquistii var. cromquistii),但西畴重楼部分植株沿叶脉有紫色斑纹,表明与凌云重楼存在形态过渡,二者雄蕊数量均以3轮为主,而且变化范围一致; 西畴重楼的物候期与同域分布的凌云重楼相近,同南重楼(P. vietnamensis)差异显著; 西畴重楼多条序列的分子系统学研究显示西畴重楼和凌云重楼始终聚为一支,证实二者高度的亲缘关系。该研究结果完善了西畴重楼的生物学特性描述,首次报道了西畴重楼与凌云重楼形态特征存在过渡类型,物候学特征较一致,地理分布中心重叠,分子系统学位置相邻,仍支持李恒系统将西畴重楼作为凌云重楼的一变种。 |
| 关键词: 西畴重楼, 形态学, 物候学, 新记录, 系统位置 |
| DOI：10.11931/guihaia.gxzw201705026 |
| 分类号:Q949 |
| 文章编号:1000-3142(2018)05-0602-06 |
| Fund project:国家自然科学基金(81573545,81001606); 霍英东教育基金(121045); 四川省科技厅应用基础研究项目(2017JY0136); 四川省崇州市现代农业创新驱动试点区项目(2015-CX00-00004-ZF); 贵州省科技厅项目(黔科合LH字[2017]7054号)[Supported by the National Natural Science Foundation of China(81573545, 81001606); Huo Yingdong Educational Foundation(121045); Application Basic Research Program of Sichuan Department of Science and Technology(2017JY0136); Contemporary Agricultural Innovative Driving Experimental Area in Chongzhou District of Sichuan Province(2015-CX00-00004-ZF); Program of Guizhou Department of Science and Technology(LH[2017]7054)]。 |
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| Biological characteristics supplement and systematic position of Paris cronquistii var. xichouensis |
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RAO Wenxia1, ZHANG Kaiyuan1, YIN Xianmei1,
XUE Dan2, ZHANG Hao2, YIN Hongxiang3*
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1. College of Chinese Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China;2. West China
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| Abstract: |
| Paris cronquistii var. xichouensis is a Yunnan endemic species, but the new records of provincial distribution of Tianlin and Napo counties in Guangxi Zhuang Autonomous Region were found in the field investigation. We updated the biological characteristics of P. cronquistii var. xichouensis by observing and describing the morphological characteristics of P. cronquistii var. xichouensis, recording phenological characteristics, and observing the geographical distribution characteristics in the field. To sum up, the supplement was about its biological characteristics. We also discussed the phylogenetic relationship based on the molecular phylogeny of ITS, psbA-trnH and trnL-trnF sequences. We found that P. cronquistii var. xichouensis had no purple plaque on its back, and had wider petals and significant difference with P. cromquistii var. cromquistii. There were also a small amount of leaf vein purple plaque, indicating that there was a transition with P. cromquistii var. cromquistii; The number of stamens of the both species were mainly three rounds, but the range of change overlapped. All phenological periods of P. cronquistii var. xichouensis were closed to P. cromquistii var. cromquistii, but had significant difference with P. vietnamensis; Multi-sequence molecular phylogenetic studies showed that P. cronquistii var. xichouensis and P. cromquistii var. cromquistii were always collected as one, confirming the relationship between the two species. We completed the description of the biological characteristics of P. cronquistii var. xichouensis, and reported for the first time that there was a transition between P. cromquistii var. cromquistii and P. cronquistii var. xichouensis, and pheno-logical characteristics were more consistent, overlap of geographical distribution centers, molecular systematics adjacent to each other, still supported P. cronquistii var. xichouensis as a variant of the P. cromquistii var. cromquistii. |
| Key words: P. cronquistii var. xichouensis, morphology, phenology, new records, systematic position |
