Journal
JOURNAL OF APPLIED PHYCOLOGY
Volume 25, Issue 5, Pages 1567-1573Publisher
SPRINGER
DOI: 10.1007/s10811-012-9969-z
Keywords
Tychonema bourrellyi; Microcystis aeruginosa; Allelopathy; Volatile substances; beta-Ionone; Cyanobacteria
Funding
- National Natural Science Foundation of China [21107024]
- Foundation of Furong scholar project of Hunan Province
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The allelopathic effect of the cyanobacterium Tychonema bourrellyi against the cyanobacterium Microcystis aeruginosa is reported for the first time in this paper. The filtrate of T. bourrellyi CHAB663 culture showed strong inhibitory effect on M. aeruginosa NIES-843, but the inhibitory effect was weakened by shaking culture, and such results implied that the allelopathic effect was probably mediated by the volatile substances secreted by T. bourrellyi. beta-Ionone was identified as a major ingredient in the volatile substances in the cultures of T. bourrellyi, and it may act as an important allelochemical responsible for this allelopathic activity. The filtrates of T. bourrellyi culture were shown to decrease the maximum electron transport rate (ETRmax) and elevate the reactive oxygen species (ROS) levels in the cells of M. aeruginosa NIES-843.
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