tailieunhanh - Báo cáo khoa học: Cold stress defense in the freshwater sponge Lubomirskia baicalensis

The endemic freshwater spongeLubomirskia baicalensislives in Lake Bai-kal in winter (samples from March have been studied) under complete ice cover at near 0 C, and in summer in open water at 17 C (September). In March, specimens show high metabolic activity as reflected by the produc-tion of gametes. | IFEBS Journal Cold stress defense in the freshwater sponge Lubomirskia baicalensis Role of okadaic acid produced by symbiotic dinoflagellates Werner E. G. Muller1 2 Sergey I. Belikov2 Oxana V. Kaluzhnaya1 2 Sanja Perovic-Ottstadt1 Ernesto Fattorusso3 Hiroshi Ushijima4 Anatoli Krasko1 and Heinz C. Schroder1 1 Institut fur Physiologische Chemie Abteilung Angewandte Molekularbiologie Universitat Mainz Germany 2 LimnologicalInstitute of the Siberian Branch of Russian Academy of Sciences Irkutsk Russia 3 Dipartimento di Chimica delle Sostanze Naturali University di Napoli Federico II Italy 4 Department of DevelopmentalMedicalSciences Institute of InternationalHealth The University of Tokyo Japan Keywords dinoflagellates heat shock protein Lubomirskia baicalensis okadaic acid protein phosphatase Correspondence W. E. G. Muller Institut fur Physiologische Chemie Abteilung Angewandte Molekularbiologie Universitat Duesbergweg 6 55099 Mainz Germany Fax 49 6131 3925243 Tel 49 6131 3925910 E-mail wmueller@ Website http Database The sequences from Lubomirskia baicalen-sis reported here have been deposited in the GenBank database under the accession numbers AM392283 protein phosphatase LUBAIHSP70PP1 and AM392284 heat shock protein-70 LUBAIHSP70 Note This article is dedicated to Professor Michele Sara Professor of Zoology at the University of Genova for his outstanding contributions to marine biology 1926-2006 Received 16 August 2006 revised 21 October 2006 accepted 27 October 2006 doi The endemic freshwater sponge Lubomirskia baicalensis lives in Lake Baikal in winter samples from March have been studied under complete ice cover at near 0 C and in summer in open water at 17 C September . In March specimens show high metabolic activity as reflected by the production of gametes. L. baicalensis lives in symbiosis with green dinoflagellates which are related to Gymnodinium sanguineum. Here we show that these .