| Autor: |
Hirokane, Yu, Miyamoto, Ayaka, Kitaura, Jun, Nakano, Rie, Hirano, Yayoi M., Kawane, Masako, Yusa, Yoichi |
| Předmět: |
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| Zdroj: |
Organisms Diversity & Evolution; Jun2022, Vol. 22 Issue 2, p419-429, 11p |
| Abstrakt: |
Sacoglossan sea slugs can "steal" plastids from their food algae to use for photosynthesis (kleptoplasty). The duration of functional kleptoplast retention differs among species, being categorized into (1) no functional retention (NR), (2) short-term retention (SR; shorter than 2 weeks), and (3) long-term retention (LR; 2 weeks or longer). Although previous phylogenetic studies suggest that functional short- and long-term retention each originated multiple times, information on species inhabiting the Indo-West Pacific region, one of the areas with highest sacoglossan diversity, is still needed. We present a molecular phylogeny of > 200 sacoglossan species/populations (OTUs; including 38 newly sequenced ones) using four genes and both Bayesian and maximum likelihood methods. In addition, we newly measured the retention duration of photosynthesis by pulse-amplitude-modulated (PAM) fluorometry for over 40 species/populations. The phylogenetic tree generally agreed with the preexisting trees, including the monophyly of Oxynooidea and Plakobranchidae. The measurement of PAM fluorometry has shown the presence of 19 species/populations with functional chloroplast retention, five of which being LR. Reconstruction of ancestral character states confirms multiple origins of SR and LR. At least one possible independent origin of LR is newly suggested. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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