Ceratopteris chunii and Ceratopteris chingii (Pteridaceae), two new diploid species from China, based on morphological, cytological, and molecular data

Plant Diversity

Rui Zhang¹  Xi-Ling Dai²  Fa-Guo Wang³  Yong-Bo Liu³  Qiao-Ling Liu⁴  Jun-Hao Yu⁴  Xun-Lin Yu⁵  Yue-Hong Yan⁶ 

[1] College of Life Science, Shanghai Normal University, Shanghai, 200234, China;College of Forestry, Central South University of Forestry ＆ Technology, Changsha, Hunan, 410004, China;College of Life Science, Shanghai Normal University, Shanghai, 200234, China;Eastern China Conservation Centre for Wild Endangered Plant Resources, Shanghai Chenshan Botanical Garden, Shanghai 201602, China;Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China;State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China;

关键词: Ceratopteris;    Phylogeny;    Chromosome;    Taxonomy;    Cryptic species;   

DOI  :  

来源: DOAJ

【 摘 要 】

Understanding how natural hybridization and polyploidizations originate in plants requires identifying potential diploid ancestors. However, cryptic plant species are widespread, particularly in Ceratopteris (Pteridaceae). Identifying Ceratopteris cryptic species with different polyploidy levels is a challenge because Ceratopteris spp. exhibit high degrees of phenotypic plasticity. Here, two new cryptic species of Ceratopteris, Ceratopteris chunii and Ceratopteris chingii, are described and illustrated. Phylogenetic analyses reveal that each of the new species form a well-supported clade. C. chunii and C. chingii are similar to Ceratopteris gaudichaudii var. vulgaris and C. pteridoides, respectively, but distinct from their relatives in the stipe, basal pinna of the sterile leaf or subelliptic shape of the fertile leaf, as well as the spore surface. In addition, chromosome studies indicate that C. chunii and C. chingii are both diploid. These findings will help us further understand the origin of Ceratopteris polyploids in Asia.

【 授权许可】

Unknown