caa a22 4500 477082165 CHVBK 20180405111452.0 cr unu---uuuuu 170330e19960101xx s 000 0 eng 10.1007/BF01922424 doi (NATIONALLICENCE)springer-10.1007/BF01922424 Possible origin of zeaxanthin in the marine sponge, Reniera japonica [Elektronische Daten] [W. Miki, N. Otaki, A. Yokoyama, T. Kusumi] 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 [(3R, 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. Birkhäuser Verlag Basel, 1996 Carotenoid nationallicence marine sponge nationallicence Reniera japonica nationallicence sponge-associated bacteria nationallicence Flexibacter sp nationallicence zeaxanthin nationallicence active oxygen species nationallicence Miki W. Marine Biotechnology Institute (MBI), Shimizu Laboratories, 1990 Sodeshi, 424, Shimizu, Shizuoka, (Japan) aut Otaki N. Marine Biotechnology Institute (MBI), Shimizu Laboratories, 1990 Sodeshi, 424, Shimizu, Shizuoka, (Japan) aut Yokoyama A. Marine Biotechnology Institute (MBI), Shimizu Laboratories, 1990 Sodeshi, 424, Shimizu, Shizuoka, (Japan) aut Kusumi T. Suntory Research Center, Institute for Fundamental Research, 1-1-1 Wakayamadai, Shimamoto, 618, Mishima, Osaka, (Japan) aut Experientia Birkhäuser-Verlag 52/1(1996-01-01), 93-96 0014-4754 52:1<93 1996 52 18 https://doi.org/10.1007/BF01922424 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01922424 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Miki W. Marine Biotechnology Institute (MBI), Shimizu Laboratories, 1990 Sodeshi, 424, Shimizu, Shizuoka, (Japan) aut NATIONALLICENCE 700 1- Otaki N. Marine Biotechnology Institute (MBI), Shimizu Laboratories, 1990 Sodeshi, 424, Shimizu, Shizuoka, (Japan) aut NATIONALLICENCE 700 1- Yokoyama A. Marine Biotechnology Institute (MBI), Shimizu Laboratories, 1990 Sodeshi, 424, Shimizu, Shizuoka, (Japan) aut NATIONALLICENCE 700 1- Kusumi T. Suntory Research Center, Institute for Fundamental Research, 1-1-1 Wakayamadai, Shimamoto, 618, Mishima, Osaka, (Japan) aut NATIONALLICENCE 773 0- Experientia Birkhäuser-Verlag 52/1(1996-01-01), 93-96 0014-4754 52:1<93 1996 52 18 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer