不同处理的红茶与绿茶对塔玛亚历山大藻的抑制作用

doi:10.16378/j.cnki.1003-1111.20042

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Abstract Harmful algae bloom will threaten the balance of marine ecosystem, and it is of great significance to find algal inhibiting materials to control red tide. The short-term and long-term inhibitory effects of black tea and green tea on toxic algae Alexandrium tamarense were studied by reasonable application methods including comparing the algal inhibition effect of dry tea powder, water extract and tea residue. The results showed that the 5 h inhibition rates (IRs) of 1 mg/mL tea extract were very high [(99.45±0.39)% (green tea) and (100.00±0.00)% (black tea)], and 1h-IC₅₀ of tea extracts were 0.85 mg/mL green tea and 0.87 mg/mL black tea, respectively. Green tea residues had stronger algal inhibition than black tea residues did, and the lower the concentration was, the greater the difference of the algal inhibition was; the maximal IRs of 0.80 mg/mL green tea and black tea residue were (94.56±1.03)% and (22.17±1.66)%, respectively; 1h-IC₅₀ of green tea and black tea residues were 3.39 mg/mL and 8.96 mg/mL, respectively. The high algal inhibition rate (green tea powder≥(94.23±0.64)%, black tea powder ≥(88.31±2.35)%) of 1 mg/mL tea powder was kept from 24 to 120 hours, and the IR of green tea powder was higher than that of black tea powder before 24 hours, without significant difference between them after 48 hours. In terms of the 72-hour average IR for each concentration, the average IR of green tea extract was 1.95—3.72 times as that of black tea extracts at a concentrations of 0.63 mg/mL or less; the average IR of green tea residue was 1.19—4.24 times as that of black tea residue at concentration between 0.80 mg/mL and 8.00 mg/mL. It was found that green tea had stronger inhibitory effect on A. tamarense than black tea did, and green tea residue was a promising algal inhibiting material.

Key words： Alexandrium tamarens DH01 black tea green tea algal inhibition rate half inhibitory concentration

Received: 10 March 2020

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	CHEN Xuehao
	WU Yuqiang
	YANG Zhi
	ZHOU Lihong

Cite this article:

CHEN Xuehao,WU Yuqiang,YANG Zhi, et al. Inhibition of Black Tea and Green Tea Treated by Different Methods to Alga Alexandrium tamarense[J]. Fisheries Science, 2021, 40(4): 544-552.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.20042 OR https://www.shchkx.com/EN/Y2021/V40/I4/544

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