Growth and F_v/F_m in embryos of Hizikia fusiformis (Harvey) Okamura (Sargassaceae,Phaeophyta) cultured under different temperature and irradiance conditions  

作　　者：WANG Longle ZHANG Xin ZOU Dinghui CHEN Weizhou JIANG Heng 王龙乐;张鑫;邹定辉;陈伟洲;姜恒(School of Environment and Energy,South China University of Technology;The Science and Technology Division,South China University of Technology;The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education;Marine Biology Institute,Science Center,Shantou University)

机构地区：[1]School of Environment and Energy,South China University of Technology,Guangzhou 510006,China [2]The Science and Technology Division,South China University of Technology,Guangzhou 510006,China [3]The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,Guangzhou 510006,China [4]Marine Biology Institute,Science Center,Shantou University,Shantou 515063,China

出　　处：《Journal of Oceanology and Limnology》2018年第5期1798-1805,共8页海洋湖沼学报（英文）

基　　金：Supported by the Science and Technology Planning Project of Guangdong,China(No.2016A020222001)

摘　　要：Understanding the embryo physiology of Hizikia fusiformis（Harvey） Okamura will promote the development of artificial seedlings. In this study, H. fusiformis embryos were cultured under different environmental conditions, including different temperatures（15℃, 20℃, and 25℃）, sunlight intensities（100%, 50%, and 25% of full solar radiation） and types of UVR（UV-A and UV-B）. Then, we determined the lengths, maximal quantum yields（ Fv/Fm）, and survival rates of the embryos. The results showed that the embryos had the highest lengths, Fv/Fm values and survival percentages when cultured under a temperature of 20℃ and 25% sunlight intensity. The full level of solar radiation severely reduced the growth and survival ratios of the embryos. Hizikia embryos recovered within 2 h from the damage caused by short-term（30 min） high radiation（about 70% of full solar radiation） and UVR exposure. However, the viabilities of the embryos were significantly decreased after 4 h exposure to UVR. According to these results, we propose that culture conditions with indoor natural light and room temperature would be favorable for the growth, development and physiology of H izikia embryos.Understanding the embryo physiology of Hizikia fusiformis(Harvey) Okamura will promote the development of artificial seedlings. In this study, H. fusiformis embryos were cultured under different environmental conditions, including different temperatures(15°C, 20°C, and 25°C), sunlight intensities(100%, 50%, and 25% of full solar radiation) and types of UVR(UV-A and UV-B). Then, we determined the lengths, maximal quantum yields( F_v/F_m), and survival rates of the embryos. The results showed that the embryos had the highest lengths, F_v/F_m values and survival percentages when cultured under a temperature of 20°C and 25% sunlight intensity. The full level of solar radiation severely reduced the growth and survival ratios of the embryos. Hizikia embryos recovered within 2 h from the damage caused by short-term(30 min) high radiation(about 70% of full solar radiation) and UVR exposure. However, the viabilities of the embryos were significantly decreased after 4 h exposure to UVR. According to these results, we propose that culture conditions with indoor natural light and room temperature would be favorable for the growth, development and physiology of H izikia embryos.

关 键 词：Hizikia fusiformis embryos GROWTH FV/FM temperature IRRADIANCE 

分 类 号：S966.16[农业科学—水产养殖] S9-9[农业科学—水产科学]