| 摘要: |
| 基于Flora of China采用国际石松类和蕨类植物新分类系统,其水龙骨科(Polypodiaceae)不仅涵盖了秦仁昌分类系统中的水龙骨科(Polypodiaceae)20多属,而且还包括槲蕨科(Drynariaceae)、鹿角蕨科(Platyceriaceae)等独立的科。水龙骨科(Polypodiaceae)新分类系统种类较多、分类复杂,需要对其合理性和孢粉学在新分类系统中的意义进行新的探讨。该文首次以新分类系统为依据,采用扫描电镜对山东分布的水龙骨科(Polypodiaceae)植物孢子形态及其周壁纹饰亚显微结构进行了系统地观察。结果表明:该科孢子形态为圆肾形,左右对称,具周壁,其周壁纹饰在种内稳定,在亚科、属及种间区别显著。孢粉学研究结果,支持槲蕨亚科、鹿角蕨亚科分别列于水龙骨科下的两个亚科; 基于山东假瘤蕨孢子周壁纹饰,并结合叶片形态特征,山东假瘤蕨(Phymatopteris shandongensis J. X. Li et C. Y. Wang)应为一个独立的新种,不宜并入金鸡脚假瘤蕨 [Phymatopteris hastata(Thunb.)Pic. Serm.]。依据《国际植物命名法规》和Flora of China分类系统,山东假瘤蕨(Phymatopteris shandongensis J. X. Li et C. Y. Wang)新组合为山东假瘤蕨 [Selliguea shandongensis(J. X. Li et C. Y. Wang)J. X. Li & X. J. Li, comb. nov.]。该研究结果不仅首次为水龙骨科植物孢粉学积累了新资料,而且也为其新分类系统提供了孢粉学的科学依据,与DNA分类系统相吻合,证明其新分类系统的合理性和科学性,在构建水龙骨科及其亚科的自然分类系统中具有重要意义。 |
| 关键词: 水龙骨科, 槲蕨亚科, 鹿角蕨亚科, 星蕨亚科, 山东假瘤蕨, 孢粉学, 扫描电镜, 山东 |
| DOI：10.11931/guihaia.gxzw201903048 |
| 分类号:Q949 |
| 文章编号:1000-3142(2020)04-0443-09 |
| 基金项目:2019年中医药公共卫生服务补助专项“全国中药资源普查项目”(财社[2019]39号); 国家科技攻关项目( ZYBZH-Y-HEN-18)[Supported by TCM Public Health Service Special Subsidy in 2019 “the National Traditional Chinese Medicine Resources Survey Project”([2019]No. 39); the National Key Program of Science and Technology(ZYBZH-Y-HEN-18)]。 |
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| Palynology of Polypodiaceae from Shandong and its significance in classification |
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LI Xiaojuan1, LI Jianxiu2*
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1. Shandong Xiandai University, Jinan 250104, China;2. Shandong University of Traditional Chinese Medicine, Jinan 250014, China
1. Shandong Xiandai University, Jinan 250104, China; 2. Shandong University of Traditional Chinese Medicine, Jinan 250014, China
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| Abstract: |
| According to the new classification system of international Lycopods and Ferns in the Flora of China, Polypodiaceae includes more than 20 genus of Polypodiaceae in the Qinrenchang classification system, and also includes independent families such as Drynariaceae and Platyceriaceae. The new classification system of Polypodiaceae in the Flora of China with many issues needs further investigation and classification. Here we investigated the spore morphology and perispore ornamentation submicroscopic structure of Polypodiaceae from Shandong Province using scanning electron microscopy(SEM). This is the first palynological study based on the new classification system of Polypodiaceae. The results were as follows: Spores of Polypodiaceae were reniform, bilaterally symmetrical, possessing a perispore with stable ornamentation within species and clear distinctions between subfamily, genus and species. The palynological studies supported two of the subfamilies of Polypodiaceae-Drynaria and Platycerium delineated in the FOC. In addition, the perispore ornamentation combined with leaf morphological characteristics showed that Phymatopteris shandongensis J. X. Li et C. Y. Wang was a distinct species, and should be restored to a species level position rather than incorporated with P. hastata (Thunb.)Pic. Serm., not regard as Phymatopteris but as a new combination Selliguea shandongensis (J. X. Li et C. Y. Wang)J. X. Li & X. J. Li, comb. nov. according to the International Code of Botanical Nomenclature and the classification system of Flora of China. Our study not only has accumulated new information for the palynology of Polypodiaceae, but also provides a palynological basis for its new classification system, which is consistent with molecular analysis, and confirms the rationality of the new classification system of Polypodiaceae and its subfamilies. |
| Key words: Polypodiaceae, Drynarioideae, Platycerioideae, Microsoroideae, Selliguea shandongensis, palynology, SEM, Shandong |
