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Volatile bromocarbons produced by Falkenbergia stages of Asparagopsis spp. (Rhodophyta)
Author(s) -
Marshall Rhoda A.,
Harper David B.,
McRoberts W. Colin,
Dring Matthew J.
Publication year - 1999
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1999.44.5.1348
Subject(s) - bromoform , chemistry , bromine , production rate , environmental chemistry , chromatography , organic chemistry , chloroform , industrial engineering , engineering
Volatile halocarbons released by 12 Falkenbergia phase isolates of Asparagopsis taxiformis and Asparagopsis armata collected from widely scattered geographical locations were identified using a purge and trap technique and gas chro‐matography/mass spectrometry. Production of the compounds under normal and high irradiance was quantified where possible. Bromoform (CHBr 3 ), dibromomethane (CH 2 Br 2 ), 1,2‐di‐bromoethylene (C 2 H 2 Br 2 ), dibromochloromethane (CHBr 2 Cl), and tribromoethylene (C 2 HBr 3 ) were identified as algal products. C 2 H 2 Br 2 and C 2 HBr 3 have not previously been recorded as natural products. Considerable qualitative and quantitative differences existed between isolates in the halocarbons released. The rates of CHBr 3 and C 2 H 2 Br 2 production were negatively correlated. Increased irradiance invariably resulted in higher rates of release of halocarbons. Initial rates of production ranged between <8 and 866 ng g −1 fresh weight (FW) h −1 for CHBr 3 , <3 and 59 ng g −1 FW h −1 for CH 2 Br 2 , and <0.4 and 17 ng g −1 FW h −1 for C 2 H 2 Br 2 .