蒺藜科及由其分出的两新科四种植物种子形态特征比较研究
收稿日期: 2013-03-20
网络出版日期: 2013-04-12
基金资助
科技部科技基础性工作专项重点项目 (2007FY110100)
Comparative Study on Plant Seed Morphological Characteristics of Zygophyllaceae and Two New Families Separated from It
Received date: 2013-03-20
Online published: 2013-04-12
Supported by
科技部科技基础性工作专项重点项目 (2007FY110100)
对青藏高原地区常见的原属蒺藜科4种高山植物（霸王Sarcozygium xanthoxylom、白刺Nitraria tangutorum、小果白刺Nitraria sibirica及多裂骆驼蓬Peganum multisectum）的9个自然居群的种子形态运用扫描电镜进行了观察。来自3个新界定科的不同植物的种子特征差异明显，其种皮纹饰各不相同，种间差异明显，说明这一特征在3个科之间具有重要的系统学意义。同一物种不同产地的种子形态特征差异不显著，说明这一性状在同一物种间是相对稳定的。研究结果支持将白刺科和及骆驼蓬科的物种从蒺藜科中分出，表面种子微形态这一稳定的性状可以作为白刺科、蒺藜科以及骆驼蓬科3个关系比较复杂的科之间的一个分类依据。
张发起1 , 付鹏程1、2 , 高庆波1 , 李印虎1、2 , Gulzar Khan1、2 , 陈世龙1 . 蒺藜科及由其分出的两新科四种植物种子形态特征比较研究[J]. Plant Diversity, 2013 , 35(3) : 280 -284 . DOI: 10.7677/ynzwyj201313046
Seed morphology of 9 natural populations of 4 species (Sarcozygium xanthoxylom, Nitraria tangutorum, Nitraria sibirica and Peganum multisectum) on the QinghaiTibet Plateau, originally in the same family Zygophyllaceae, was observed by Scanning Electron Microscopy (SEM). The four species from the three new definition family have significant differences on seed morphology. Especially their seed surface is different from each other and difference among species is distinct. It shows that the character has important systematic significance among the three family. In addition, Seed morphological characteristics of the same species from different localities show no significant difference. Both demonstrate that the character is relatively stable within species. The findings of our study support that species in Nitariaceae and Peganaceae could be separated from Zygophyllaceae.It indicates that the stable characteristic could be an evidence for the current classification of the three families (Nitariaceae, Zygophyllaceae, Peganaceae) which have complex relationship.
Key words： Seed micromorphology; Zygophyllaceae; QinghaiTibet Plateau
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