TY - JOUR
T1 - LIPOPHILIC PIGMENTS FROM CYANOBACTERIAL (BLUE‐GREEN ALGAL) AND DIATOM MATS IN HAMELIN POOL, SHARK BAY, WESTERN AUSTRALIA
AU - Palmisano, Anna C.
AU - Summons, Roger E.
AU - Cronin, Sonja E.
AU - Des Marais, David J.
PY - 1989
Y1 - 1989
N2 - Lipophilic pigments were examined in microbial mat communities dominated by cyanobacteria in the intertidal zone and by diatoms in the subtidal and sublittoral zones of Hamelin Pool, Shark Bay, Western Australia. These microbial mats have evolutionary significance because of their similarity to lithified stromatolites from the Proterozoic and Early Paleozoic eras. Fucoxanthin, diatoxanthin, diadinoxanthin, β‐carotene, and chlorophylls a and c characterized the diatom mats, whereas cyanobacterial mats contained myxoxanthophyll zeaxanthin, echinenone, β‐carotene, chlorophyll a and, in some cases, sheath pigment. The presence of bacteriochlorophyll a with in the mats suggest a close association of photosynthetic bacteria with diatoms and cyanobacteria. The high carotenoids: chlorophyll a ratios (0.84–2.44 wt/wt) in the diatom mats suggest that carotenoids served a photoprotective function in this high light environment. By contrast, cyanobacterial sheath pigment may have largely supplanted the photoprotective role of carotenoids in the intertidal mats.
AB - Lipophilic pigments were examined in microbial mat communities dominated by cyanobacteria in the intertidal zone and by diatoms in the subtidal and sublittoral zones of Hamelin Pool, Shark Bay, Western Australia. These microbial mats have evolutionary significance because of their similarity to lithified stromatolites from the Proterozoic and Early Paleozoic eras. Fucoxanthin, diatoxanthin, diadinoxanthin, β‐carotene, and chlorophylls a and c characterized the diatom mats, whereas cyanobacterial mats contained myxoxanthophyll zeaxanthin, echinenone, β‐carotene, chlorophyll a and, in some cases, sheath pigment. The presence of bacteriochlorophyll a with in the mats suggest a close association of photosynthetic bacteria with diatoms and cyanobacteria. The high carotenoids: chlorophyll a ratios (0.84–2.44 wt/wt) in the diatom mats suggest that carotenoids served a photoprotective function in this high light environment. By contrast, cyanobacterial sheath pigment may have largely supplanted the photoprotective role of carotenoids in the intertidal mats.
KW - carotenoids
KW - chlorophyll
KW - cyanobacterial pigments
KW - diatom pigmemts
KW - lipophilic pigments
KW - stromatolites
UR - http://www.scopus.com/inward/record.url?scp=0024856792&partnerID=8YFLogxK
U2 - 10.1111/j.0022-3646.1989.00655.x
DO - 10.1111/j.0022-3646.1989.00655.x
M3 - Article
C2 - 11542174
AN - SCOPUS:0024856792
SN - 0022-3646
VL - 25
SP - 655
EP - 661
JO - Journal of Phycology
JF - Journal of Phycology
IS - 4
ER -