Comparative Analysis of Physiological Responses in Two Ulva prolifera Strains Revealed the Effect of Eutrophication on High Temperature and Copper Stress Tolerance

被引：8

作者：

Bao, Menglin ^{[1
]}

Park, Ji-Sook ^{[2
]}

Xing, Qikun ^{[2
]}

He, Peimin ^{[3
]}

Zhang, Jianheng ^{[3
]}

Yarish, Charles ^{[4
]}

Yoo, Hyun Il ^{[5
]}

Kim, Jang K. ^{[1
,2
]}

机构：

[1] Incheon Natl Univ, Dept Marine Sci, Incheon, South Korea

[2] Incheon Natl Univ, Res Inst Basic Sci, Incheon, South Korea

[3] Shanghai Ocean Univ, Coll Marine Ecol & Environm, Shanghai, Peoples R China

[4] Univ Connecticut, Dept Ecol & Evolutionary Biol, Stamford, CT USA

[5] Natl Inst Fisheries Sci, Fisheries Seed & Breeding Res Inst, Jeonnam, South Korea

来源：

FRONTIERS IN MARINE SCIENCE | 2022年 / 9卷

基金：

新加坡国家研究基金会;

关键词：

copper; eutrophication; global warming; green tides; Ulva prolifera; LARGEST GREEN TIDE; YELLOW SEA; PHOTOSYNTHETIC PERFORMANCE; MACROALGAL BLOOMS; MARINE MACROALGAE; CLIMATE-CHANGE; CHLOROPHYLL-A; FRESH-WATER; GROWTH; TOXICITY;

D O I：

10.3389/fmars.2022.863918

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Climate change directly influences species composition and distribution of macroalgae on a global scale. Meanwhile, eutrophication and heavy metal pollution continue to be major concerns in coastal areas. The objective of this study was to explore interactive effects of these complex environmental conditions (high temperature, eutrophication and heavy metal pollution) in the bloom forming green alga, Ulva prolifera. This study evaluated the physiological characteristics of two strains of U. prolifera (Korean strain and Chinese strain) at two temperature levels (20 and 25 degrees C), two nutrient concentrations (low nutrient: 50 mu M of N and 5 mu M of P; high nutrient: 250 mu M of N and 25 mu M of P) and three copper concentrations [Control (0.03 mu M); 0.1 mu M; 1 mu M]. Under the 20 degrees C and low nutrient condition, the Chinese strain grew significantly slower at 1 mu M copper group compared to copper control group. Whereas there was no significant change in the growth rate of the Korean strain. High nutrient significantly increased the growth rate, photosynthetic and respiration rates, soluble protein and tissue N in both strains at all copper groups under 20 degrees C compared to copper groups under 20 degrees C and low nutrient condition. Both strains grew significantly slower at 1 mu M copper group compare to copper control group under high nutrient and 20 degrees C condition. 25 degrees C significantly reduced the growth rate of both strains at each nutrient condition. Under 25 degrees C and low nutrient condition, 1 mu M copper had no effects on growth rate and all photosynthetic parameters of both strains. Meanwhile, under 25 degrees C and high nutrient conditions, 1 mu M copper significantly inhibited growth and photosynthetic rates and increased soluble protein content in the Chinese strain compared to copper control treatment. These results suggest that the Korean strain had higher tolerance to the copper stress than the Chinese strain. Higher nutrient levels enhanced the temperature tolerance and the copper stress in U. prolifera. Increased temperature reduced the negative effects caused by copper stress in U. prolifera.

引用

页数：11