Possible origin of zeaxanthin in the marine sponge,Reniera japonica (original) (raw)

Abstract

As part of a study to clarify the origins of biologically active substances in marine sponges, the carotenoids produced by two species of marine bacteria,Flexibacter sp. strain number DK30213 and DK30223, associated with the marine sponge,Reniera japonica, were investigated. Both bacteria were found to produce zeaxanthin [(3_R_, 3′R)-dihydroxy-β,β-carotene] which is widely distributed in marine organisms. This carotenoid was also detected in the host sponge, suggesting the transport of zeaxanthin from the microorganisms to the host. As zeaxanthin plays the role of a quencher and scavenger for active species of oxygen, it is presumed that the sponge accumulates the bacterial product as a defense substance against the active oxygen species produced under irradiation by strong sunlight. It is thought that the bacteria are symbionts of the host sponge and act by obtaining the solid substrate and medium needed for settlement and growth from the host, and by producing and transmitting the biologically active substance to the host. Zeaxanthin-producing bacteria are also considered to have potential for practical uses by the aquacultural, pharmaceutical and food industries.

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Authors and Affiliations

  1. Marine Biotechnology Institute (MBI), Shimizu Laboratories, 1990 Sodeshi, 424, Shimizu, Shizuoka, Japan
    W. Miki, N. Otaki & A. Yokoyama
  2. Suntory Research Center, Institute for Fundamental Research, 1-1-1 Wakayamadai, Shimamoto, 618, Mishima, Osaka, Japan
    W. Miki & T. Kusumi

Authors

  1. W. Miki
  2. N. Otaki
  3. A. Yokoyama
  4. T. Kusumi

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Miki, W., Otaki, N., Yokoyama, A. et al. Possible origin of zeaxanthin in the marine sponge,Reniera japonica.Experientia 52, 93–96 (1996). https://doi.org/10.1007/BF01922424

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