Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis

THOMAS, NATHAN; Coates, Christopher; Tang, Kam

doi:10.1016/j.jembe.2022.151830

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Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis

NATHAN THOMAS, Christopher Coates, Kam Tang

Journal of Experimental Marine Biology and Ecology, Volume: 558, Start page: 151830

Swansea University Authors: NATHAN THOMAS, Christopher Coates, Kam Tang

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DOI (Published version): 10.1016/j.jembe.2022.151830

Abstract

Symsagittifera roscoffensis, an Acoel flatworm that lives within the intertidal zone, was first discovered over a century ago as a “plant animal” due to its symbiotic relationship with the alga Tetraselmis convolutae. Although commonly used as a model organism in biomedical research, there is little...

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Published in:	Journal of Experimental Marine Biology and Ecology
ISSN:	0022-0981 1879-1697
Published:	Elsevier BV 2022
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URI:	https://cronfa.swan.ac.uk/Record/cronfa61636
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first_indexed	2022-10-24T09:11:13Z
last_indexed	2023-01-13T19:22:30Z
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spelling	v2 61636 2022-10-24 Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis ea301a73007049cf191d0caf171a3b8c NATHAN THOMAS NATHAN THOMAS true false c62fa509397c2af92b316cda4987ff8e Christopher Coates Christopher Coates true false 69af43a3b9da24aef65c5d3a44956fe3 0000-0001-9427-9564 Kam Tang Kam Tang true false 2022-10-24 Symsagittifera roscoffensis, an Acoel flatworm that lives within the intertidal zone, was first discovered over a century ago as a “plant animal” due to its symbiotic relationship with the alga Tetraselmis convolutae. Although commonly used as a model organism in biomedical research, there is little information regarding its life history or how environmental factors affect this organism. In this study, we investigated the effects of a range of abiotic factors on S. roscoffensis by measuring its photosynthetic oxygen production rate under different salinities, temperatures, light intensities, photoperiods, and nutrient concentrations over 6 days. Salinity (20, 30 and 40) had little effect on photosynthetic rate, whereas a temperature of 14 °C yielded significantly higher final oxygen production than 0 and 30 °C. The lowest light intensity (21 μmol m−2 s−1), the shortest photoperiod (8 L:16 D) and the intermediate nutrient concentration (f/4) resulted in the highest final oxygen production rates. Our results showed that S. roscoffensis had the ability to tolerate and remain photosynthetically active under a wide range of conditions that it is likely to experience within the intertidal zone. Using our experimental data, we estimated that S. roscoffensis was able to produce 174% body C d−1 via photosynthesis alone, which could explain the total absence of heterotrophic feeding in this organism. The organism appeared to be robust and easy to cultivate, which should open new opportunities for its wider applications. Journal Article Journal of Experimental Marine Biology and Ecology 558 151830 Elsevier BV 0022-0981 1879-1697 Acoel worm; Intertidal; Oxygen production; Photosymbiosis; Wales 22 11 2022 2022-11-22 10.1016/j.jembe.2022.151830 COLLEGE NANME COLLEGE CODE Swansea University SU Library paid the OA fee (TA Institutional Deal) 2023-05-24T16:30:30.2780366 2022-10-24T10:09:37.2985500 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences NATHAN THOMAS 1 Christopher Coates 2 Kam Tang 0000-0001-9427-9564 3 61636__25944__0917e3a7f64c47adb5a95adb23815f9c.pdf JEMBE_558.pdf 2022-11-29T08:20:45.0488093 Output 1508922 application/pdf Version of Record true © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license true eng https://creativecommons.org/licenses/by/4.0/
title	Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis
spellingShingle	Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis NATHAN THOMAS Christopher Coates Kam Tang
title_short	Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis
title_full	Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis
title_fullStr	Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis
title_full_unstemmed	Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis
title_sort	Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis
author_id_str_mv	ea301a73007049cf191d0caf171a3b8c c62fa509397c2af92b316cda4987ff8e 69af43a3b9da24aef65c5d3a44956fe3
author_id_fullname_str_mv	ea301a73007049cf191d0caf171a3b8c_*_NATHAN THOMAS c62fa509397c2af92b316cda4987ff8e__Christopher Coates 69af43a3b9da24aef65c5d3a44956fe3_**_Kam Tang
author	NATHAN THOMAS Christopher Coates Kam Tang
author2	NATHAN THOMAS Christopher Coates Kam Tang
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description	Symsagittifera roscoffensis, an Acoel flatworm that lives within the intertidal zone, was first discovered over a century ago as a “plant animal” due to its symbiotic relationship with the alga Tetraselmis convolutae. Although commonly used as a model organism in biomedical research, there is little information regarding its life history or how environmental factors affect this organism. In this study, we investigated the effects of a range of abiotic factors on S. roscoffensis by measuring its photosynthetic oxygen production rate under different salinities, temperatures, light intensities, photoperiods, and nutrient concentrations over 6 days. Salinity (20, 30 and 40) had little effect on photosynthetic rate, whereas a temperature of 14 °C yielded significantly higher final oxygen production than 0 and 30 °C. The lowest light intensity (21 μmol m−2 s−1), the shortest photoperiod (8 L:16 D) and the intermediate nutrient concentration (f/4) resulted in the highest final oxygen production rates. Our results showed that S. roscoffensis had the ability to tolerate and remain photosynthetically active under a wide range of conditions that it is likely to experience within the intertidal zone. Using our experimental data, we estimated that S. roscoffensis was able to produce 174% body C d−1 via photosynthesis alone, which could explain the total absence of heterotrophic feeding in this organism. The organism appeared to be robust and easy to cultivate, which should open new opportunities for its wider applications.
published_date	2022-11-22T16:30:28Z
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Environmental constraints on the photosynthetic rate of the marine flatworm Symsagittifera roscoffensis

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