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Madhuca hainanensis Chun & F.C.How is an endangered and endemic species in Hainan Island, and it was ranked as a VU (Vulnerable) species in China. In this study, we reported its complete chloroplast (cp) genome sequence based on high throughput sequencing data. The complete cp genome was 159,630 bp in length, containing two short inverted repeat (IRs) of 26,093 bp, a large single copy (LSC) region of 88,846 bp and a small single copy (SSC) region of 18,598 bp. Totally, the cp genome contained 131 genes, including 86 protein coding genes (PCG), eight rRNA genes and 37 tRNAs. The GC contents of this genome was 36.8%. A maximum likelihood (ML) phylogenetic analysis indicates that M. hainanensis is closely related to Sinosideroxylon wightianum. [ABSTRACT FROM AUTHOR]

The article discusses a study on the variation in life-history traits between two populations of Asian yellow pond turtle or Mauremys mutica in Zhejiang and Hainan, China. The study primarily investigated the differences in body size and growth rate of hatchlings. The Zheijiang population was found to have larger hatchling body mass compared with the Hainan population. Faster growth was observed in hatchlings from the Hainan population. There was a sex-specific difference in growth rates in the Hainan population. According to the authors, the findings suggest that there is more energy in eggs from the Zhejiang population as it produces larger hatchlings.

Partridge tea is one of the famous local herbal teas of Hainan Island, China. In the present study, headspace solid-phase microextraction and gas chromatography-mass spectrometry were combined to determine and analyze the volatile components in the red and green leaves of partridge tea. Seventeen volatile components were identified in the red young leaves. The olefins, alkanes, and alcohols accounted for 71.24%, 1.1%, and 0.54%, among which the main components were caryophyllene (22.50%), humulene (18.73%), and a-guaiene (8.78%), respectively. Twenty volatile components were identified from red mature leaves, including 34.74% olefins, 6.14% esters, and 3.11% acids. Eighteen volatile components were identified from green young leaves, among which olefins (70.52%), alkanes (4.32%), and alcohol (0.89%) were the major components. Nineteen volatile components were identified from green mature leaves, among which the olefins, esters, and acids were the major components with the contents of 46.04%, 6.38%, and 1.37%, respectively. Results showed that the major volatile components of partridge tea were olefins, in which caryophyllene was the most abundant. The contents of volatile components between red leaves and green leaves had notable differences, which might be useful for germplasm identification of partridge tea. [ABSTRACT FROM AUTHOR]