Takaichi S, Inoue K, Akaike M, Kobayashi M, Oh-oka H, Madigan M T
Biological Laboratory, Nippon Medical School, 297, Kosugi-cho 2, Nakahara, Kawasaki 211, Japan.
Arch Microbiol. 1997 Oct;168(4):277-81. doi: 10.1007/s002030050499.
The carotenoids of five species of heliobacteria (Heliobacillus mobilis, Heliophilum fasciatum, Heliobacterium chlorum, Heliobacterium modesticaldum, and Heliobacterium gestii) were examined by spectroscopic methods, and the C30 carotene 4,4'-diaponeurosporene was found to be the dominant pigment; heliobacteria were previously thought to contain the C40 carotenoid neurosporene. In addition, trace amounts of the C30 diapocarotenes diapolycopene, diapo-zeta-carotene, diapophytofluene, and diapophytoene were also found. Up to now, diapocarotenes have been found in only three species of chemoorganotrophic bacteria, but not in phototropic organisms. Furthermore, the esterifying alcohol of bacteriochlorophyll g from all known species of heliobacteria was determined to be farnesol (C15) instead of the usual phytol (C20). Heliobacteria may be unable to produce geranylgeranyol (C20).
采用光谱法对5种嗜盐菌（运动嗜盐芽孢杆菌、条纹嗜盐菌、绿色嗜盐杆菌、适度嗜盐杆菌和杰氏嗜盐杆菌）的类胡萝卜素进行了检测，发现C30胡萝卜素4,4'-二脱辅神经孢素是主要色素；嗜盐菌以前被认为含有C40类胡萝卜素神经孢素。此外，还发现了痕量的C30脱辅胡萝卜素，如脱辅番茄红素、脱辅ζ-胡萝卜素、脱辅八氢番茄红素和脱辅六氢番茄红素。到目前为止，脱辅胡萝卜素仅在3种化能有机营养细菌中被发现，而在光合生物中未被发现。此外，已确定所有已知嗜盐菌种类的细菌叶绿素g的酯化醇为法呢醇（C15），而非通常的叶绿醇（C20）。嗜盐菌可能无法产生香叶基香叶醇（C20）。
