Photosynthetic Characteristics of Three Cohabitated Macroalgae in the Daya Bay, and Their Responses to Temperature Rises

Biochemical compositions and photosynthetic characteristics of three naturally cohabitated macroalgae, Ulva fasciata, Sargassum hemiphyllum and Grateloupia livida, were comparably explored in the field conditions in Daya Bay, northern South Ch...

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Autores principales:	Xiaohan Shi, Dinghui Zou, Shanshan Hu, Guangming Mai, Zengling Ma, Gang Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	photosynthetic characteristics temperature rise <i>Ulva fasciata</i> <i>Sargassum hemiphyllum</i> <i>Grateloupia livida</i> Botany QK1-989
Acceso en línea:	https://doaj.org/article/9f2014fe09b74f0e9e7e91e582a38383
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spelling	oai:doaj.org-article:9f2014fe09b74f0e9e7e91e582a383832021-11-25T18:46:37ZPhotosynthetic Characteristics of Three Cohabitated Macroalgae in the Daya Bay, and Their Responses to Temperature Rises10.3390/plants101124412223-7747https://doaj.org/article/9f2014fe09b74f0e9e7e91e582a383832021-11-01T00:00:00Zhttps://www.mdpi.com/2223-7747/10/11/2441https://doaj.org/toc/2223-7747Biochemical compositions and photosynthetic characteristics of three naturally cohabitated macroalgae, <i>Ulva fasciata</i>, <i>Sargassum hemiphyllum</i> and <i>Grateloupia livida</i>, were comparably explored in the field conditions in Daya Bay, northern South China Sea, as well as their responses to temperature rise. Chlorophyll <i>a</i> (Chl <i>a</i>) and carotenoids contents of <i>U. fasciata</i> were 1.00 ± 0.15 and 0.57 ± 0.08 mg g<sup>−1</sup> in fresh weight (FW), being about one- and two-fold higher than that of <i>S. hemiphyllum</i> and <i>G. livida</i>; and the carbohydrate content was 20.3 ± 0.07 mg g<sup>−1</sup> FW, being about three- and one-fold higher, respectively. Throughout the day, the maximal photochemical quantum yield (F<sub>V</sub>/F<sub>M</sub>) of Photosystem II (PS II) of these three macroalgae species decreased from morning to noon, then increased to dusk and kept steady at nighttime. Consistently, the rapid light curve-derived light utilization efficiency (α) and maximum relative electron transfer rate (rETRmax) were lower at noon than that at morning- or night-time. The F<sub>V</sub>/F<sub>M</sub> of <i>U. fasciata</i> (varying from 0.78 to 0.32) was 38% higher than that of <i>G. livida</i> throughout the day, and that of <i>S. hemiphyllum</i> was intermediate. The superoxide dismutase (SOD) and catalase (CAT) activities in <i>U. fasciata</i> were lower than that in <i>S. hemiphyllum</i> and <i>G. livida</i>. Moreover, the rises in temperature species-specifically mediated the damage (<i>k</i>) caused by stressful high light and the corresponding repair (<i>r</i>) to photosynthetic apparatus, making the <i>r</i>/<i>k</i> ratio increase with the rising temperature in <i>U. fasciata</i>, unchanged in <i>S. hemiphyllum</i> but decreased in <i>G. livida</i>. Our results indicate that <i>U. fasciata</i> may compete with <i>S. hemiphyllum</i> or <i>G. livida</i> and dominate the macroalgae community under aggravatedly warming future in the Daya Bay.Xiaohan ShiDinghui ZouShanshan HuGuangming MaiZengling MaGang LiMDPI AGarticlephotosynthetic characteristicstemperature rise<i>Ulva fasciata</i><i>Sargassum hemiphyllum</i><i>Grateloupia livida</i>BotanyQK1-989ENPlants, Vol 10, Iss 2441, p 2441 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	photosynthetic characteristics temperature rise <i>Ulva fasciata</i> <i>Sargassum hemiphyllum</i> <i>Grateloupia livida</i> Botany QK1-989
spellingShingle	photosynthetic characteristics temperature rise <i>Ulva fasciata</i> <i>Sargassum hemiphyllum</i> <i>Grateloupia livida</i> Botany QK1-989 Xiaohan Shi Dinghui Zou Shanshan Hu Guangming Mai Zengling Ma Gang Li Photosynthetic Characteristics of Three Cohabitated Macroalgae in the Daya Bay, and Their Responses to Temperature Rises
description	Biochemical compositions and photosynthetic characteristics of three naturally cohabitated macroalgae, <i>Ulva fasciata</i>, <i>Sargassum hemiphyllum</i> and <i>Grateloupia livida</i>, were comparably explored in the field conditions in Daya Bay, northern South China Sea, as well as their responses to temperature rise. Chlorophyll <i>a</i> (Chl <i>a</i>) and carotenoids contents of <i>U. fasciata</i> were 1.00 ± 0.15 and 0.57 ± 0.08 mg g<sup>−1</sup> in fresh weight (FW), being about one- and two-fold higher than that of <i>S. hemiphyllum</i> and <i>G. livida</i>; and the carbohydrate content was 20.3 ± 0.07 mg g<sup>−1</sup> FW, being about three- and one-fold higher, respectively. Throughout the day, the maximal photochemical quantum yield (F<sub>V</sub>/F<sub>M</sub>) of Photosystem II (PS II) of these three macroalgae species decreased from morning to noon, then increased to dusk and kept steady at nighttime. Consistently, the rapid light curve-derived light utilization efficiency (α) and maximum relative electron transfer rate (rETRmax) were lower at noon than that at morning- or night-time. The F<sub>V</sub>/F<sub>M</sub> of <i>U. fasciata</i> (varying from 0.78 to 0.32) was 38% higher than that of <i>G. livida</i> throughout the day, and that of <i>S. hemiphyllum</i> was intermediate. The superoxide dismutase (SOD) and catalase (CAT) activities in <i>U. fasciata</i> were lower than that in <i>S. hemiphyllum</i> and <i>G. livida</i>. Moreover, the rises in temperature species-specifically mediated the damage (<i>k</i>) caused by stressful high light and the corresponding repair (<i>r</i>) to photosynthetic apparatus, making the <i>r</i>/<i>k</i> ratio increase with the rising temperature in <i>U. fasciata</i>, unchanged in <i>S. hemiphyllum</i> but decreased in <i>G. livida</i>. Our results indicate that <i>U. fasciata</i> may compete with <i>S. hemiphyllum</i> or <i>G. livida</i> and dominate the macroalgae community under aggravatedly warming future in the Daya Bay.
format	article
author	Xiaohan Shi Dinghui Zou Shanshan Hu Guangming Mai Zengling Ma Gang Li
author_facet	Xiaohan Shi Dinghui Zou Shanshan Hu Guangming Mai Zengling Ma Gang Li
author_sort	Xiaohan Shi
title	Photosynthetic Characteristics of Three Cohabitated Macroalgae in the Daya Bay, and Their Responses to Temperature Rises
title_short	Photosynthetic Characteristics of Three Cohabitated Macroalgae in the Daya Bay, and Their Responses to Temperature Rises
title_full	Photosynthetic Characteristics of Three Cohabitated Macroalgae in the Daya Bay, and Their Responses to Temperature Rises
title_fullStr	Photosynthetic Characteristics of Three Cohabitated Macroalgae in the Daya Bay, and Their Responses to Temperature Rises
title_full_unstemmed	Photosynthetic Characteristics of Three Cohabitated Macroalgae in the Daya Bay, and Their Responses to Temperature Rises
title_sort	photosynthetic characteristics of three cohabitated macroalgae in the daya bay, and their responses to temperature rises
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9f2014fe09b74f0e9e7e91e582a38383
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Photosynthetic Characteristics of Three Cohabitated Macroalgae in the Daya Bay, and Their Responses to Temperature Rises

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