Effect of Photon Fluence Rate and Specific Growth Rate on Geosmin Production of the Cyanobacterium Oscillatoria brevis (Kütz.) Gom

Abstract

The production of geosmin from the cyanobacterium OsciUatoria brevis was studied as a function of the photon fluence rate and appears to be related to the chlorophyll content.

Evaluating the Relationship Between Photopigment Synthesis and 2‐methylisoborneol Accumulation in Cyanobacteria

“…The ''light dependence'' of MIB production in P. articulata was assessed by diurnal experiments. Increased accumulation of MIB coincided with increased accumulation of lightharvesting photopigments (chl a and phycoerythrin), an occurrence also noted in other studies investigating geosmin and MIB synthesis in cyanobacteria (Naes et al 1985, 1988, Wu and Jüttner 1988b, Bowmer et al 1992, Rosen et al 1992, Utkilen and Frøshaug 1992. The observed greater correlation of MIB with phycoerythrin than with chl a is not surprising.…”

INTRACELLULAR LOCALIZATION OF THE TASTE/ODOR METABOLITE 2‐METHYLISOBORNEOL IN OSCILLATORIA LIMOSA (CYANOPHYTA)1

“…3), suggesting a potential linkage of MIB synthesis and/or binding to the pigment systems. Such evidence supports the hypotheses that chlorophyll a and carotenoid syntheses are associated with taste/odor metabolite synthesis (Naes et al 1985, 1988, Bowmer et al 1992. Naes et al (1988Naes et al ( , 1989 suggested that isoprenoid precursors (such as the monoterpene geraniol pyrophosphate, from which MIB arises; see Bentley and Meganathan 198 1) might be directed toward taste/odor metabolite synthesis during restricted lipophilic pigment synthesis, thereby indicating that taste/odor compounds are "overflow" products rather than intermediates in pigment synthesis.…”

Quantitation of Tolyporphins, Diverse Tetrapyrrole Secondary Metabolites with Chlorophyll‐Like Absorption, from a Filamentous Cyanobacterium–Microbial Community

“…After nitrogen stimulation at day 15, production of chlorophyll a increased with the age of cells and reached 9.75 nmol/mg dry cells at day 50, which is roughly equal to that in N+ (10.2 nmol/mg) and higher than that in N-(4.89 nmol/mg). The quantity of chlorophyll a obtained under N+ (9.1-17.0 mg/g dry weight) or N-(4.4-10.1 mg/g dry weight) is in the range reported for other cyanobacteria such as Oscillatoria brevis (12-16 mg/g dry weight) (Naes et al, 1985). 4 The yield of tolyporphin A was higher in N-than in N+ or NS 15 conditions.…”