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Issue: Vol. 620 No. 1: 12 Oct. 2023
Type: Article
Published: 2023-10-12
DOI: 10.11646/phytotaxa.620.1.7
Page range: 79-86
Abstract views: 77
PDF downloaded: 12

Sarcolobus globosus subsp. peregrinus, a newly recorded subspecies of Sarcolobus (Apocynaceae) from Zhanjiang, China

Key Laboratory of Plant Resources Conservation and Sustainable Utilization; South China Botanical Garden; Chinese Academy of Sciences; Guangzhou 510650; China. University of Chinese Academy of Sciences; 100049; China.
Administration Bureau of Zhanjiang Mangrove National Nature Reserve; Zhanjiang; Guangdong; 524033; China
Key Laboratory of Plant Resources Conservation and Sustainable Utilization; South China Botanical Garden; Chinese Academy of Sciences; Guangzhou 510650; China. University of Chinese Academy of Sciences; 100049; China.
Key Laboratory of Plant Resources Conservation and Sustainable Utilization; South China Botanical Garden; Chinese Academy of Sciences; Guangzhou 510650; China. University of Chinese Academy of Sciences; 100049; China.
Key Laboratory of Plant Resources Conservation and Sustainable Utilization; South China Botanical Garden; Chinese Academy of Sciences; Guangzhou 510650; China.
South China Agricultural University; Guangzhou 510642; China.
Key Laboratory of Plant Resources Conservation and Sustainable Utilization; South China Botanical Garden; Chinese Academy of Sciences; Guangzhou 510650; China.
Key Laboratory of Plant Resources Conservation and Sustainable Utilization; South China Botanical Garden; Chinese Academy of Sciences; Guangzhou 510650; China. University of Chinese Academy of Sciences; 100049; China.
Eudicots Marsdenieae coastal zone taxonomy Sarcolobus

Abstract

A newly recorded subspecies, Sarcolobus globosus subsp. peregrinus (Blanco) Rintz, was reported. This subspecies was previously known to be distributed in Southeast Asia islands, which was recently found in Zhanjiang, Guangdong, China. Detailed morphological description, field photos and geographical distribution are provided in this study. Additionally, the whole chloroplast genome was sequenced by the Illumina sequencing technology. The annotated results revealed that the chloroplast genome has a conserved quadripartite structure, with a pair of inverted repeat regions (IRs) separating the large single copy (LSC) region from the small single-copy (SSC) region, resulting in a total length of 161,561 base pairs (bp). The phylogenetic analysis shows that S. globosus subsp. peregrinus is clustered with its type subspecies (i.e., subsp. globosus), and the significant difference in branch length between them indicates a large variation in their evolutionary rates. These results provide new insights into the Apocynaceae of China.

 

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