Allelopathic effects of mixotrophic dinoflagellate Akashiwo sanguinea on co-occurring phytoplankton: the significance of nutritional ecology

doi:10.1007/s00343-020-0132-4

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋生态与环境科学重点实验室

	Allelopathic effects of mixotrophic dinoflagellate Akashiwo sanguinea on co-occurring phytoplankton: the significance of nutritional ecology
	Yang Yeyin 1; Huang Bozhu 1,2; Tang Yingzhong 3; Xu Ning 1
刊名	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2020-12-01
页码	15
关键词	Akashiwo sanguinea harmful algal blooms mixotrophy allelopathy nutrients
ISSN号	2096-5508
DOI	10.1007/s00343-020-0132-4
通讯作者	Xu Ning(txuning@163.com)
英文摘要	Blooms of Akashiwo sanguinea frequently break out around the world, causing huge economic losses to the aquaculture industry and seriously damaging coastal ecosystems. However, the formation mechanisms of A. sanguinea blooms remain unclear. We investigated the allelopathic effects of A. sanguinea on multiple phytoplankton species, explored the mode of allelochemicals action and the way of nutrient factors regulation of the allelopathic activity. Results show that strains of A. sanguinea could inhibit the growth of co-occurring phytoplankton including Scrippsiella trochoidea, Phaeocystis globosa, and Rhodomonas salina, but inhibition of Prorocentrum micans was not obvious. The inhibition rates on phytoplankton were positively correlated with the cell densities of A. sanguinea. The highest inhibition rate of 94% on R. salina was for A. sanguinea CCMA256 culture of 2 000 cells/mL at 72 h. We observed that cells of S. trochoidea, Ph. globosa, and R. salina were lysed when co-cultured with A. sanguinea, with the shortest time for S. trochoidea. Additionally, the growth rates of A. sanguinea were promoted by co-culturing with S. trochoidea, Ph. globosa, and R. salina. Four components of A. sanguinea culture were all able to inhibit growth of R. salina: the strongest inhibitory effect was found in the sonicated culture, followed by whole-cell culture, filtrates of sonicated culture, and filtrate culture. The crude extract of A. sanguinea culture also lysed cells of R. salina, and the inhibition rates on R. salina increased with the increasing dose of crude extract. It was shown that both nutrient enrichment and nitrogen:phosphorus ratio imbalance enhanced remarkably the allelopathic activity of A. sanguinea. The highest inhibition rate on R. salina of 70% occurred in A. sanguinea JX13 treatment at 2 000 cells/mL under high nutrient condition in 48 h. In JX14 treatment at 2 000 cells/mL for N:P of 10:1, the inhibition rate increased by 1.7 times of that for N:P of 20:1. In addition, the allelopathy of A. sanguinea could not only be a competitive strategy but also a nutrition strategy, playing an important role in formation and/or maintenance of blooms of the mixotrophic dinoflagellate A. sanguinea.
资助项目	National Natural Science Foundation of China (NSFC)[41576159] ; National Natural Science Foundation of China (NSFC)[41676099]
WOS研究方向	Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000595085400005
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/169264]
专题	海洋研究所_海洋生态与环境科学重点实验室
通讯作者	Xu Ning
作者单位	1.Jinan Univ, Dept Ecol, Key Lab Eutrophicat & Red Tide Prevent OfGuangdon, Guangzhou 510632, Peoples R China 2.Guangdong Environm Monitoring Ctr, Guangzhou 510308, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Yang Yeyin,Huang Bozhu,Tang Yingzhong,et al. Allelopathic effects of mixotrophic dinoflagellate Akashiwo sanguinea on co-occurring phytoplankton: the significance of nutritional ecology[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2020:15.
APA	Yang Yeyin,Huang Bozhu,Tang Yingzhong,&Xu Ning.(2020).Allelopathic effects of mixotrophic dinoflagellate Akashiwo sanguinea on co-occurring phytoplankton: the significance of nutritional ecology.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,15.
MLA	Yang Yeyin,et al."Allelopathic effects of mixotrophic dinoflagellate Akashiwo sanguinea on co-occurring phytoplankton: the significance of nutritional ecology".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2020):15.