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THE PHYCOLOGICAL SOCIETY OF AMERICA The Phycological Society of America (PSA) was founded in 1946 to promote research and teaching in all fields of Phycology. The society publishes the Journal of Phycology and the Phycological Newsletter. Annual meetings are held, often jointly with other national or international societies of mutual member interest. Phycological Society of America awards include the Bold Award for best student paper at the annual meeting, the new Student Poster Award for the best student poster at the annual meeting, the Provasoli Award for outstanding papers published in the Journal of Phycology, and the Prescott Award for the best Phycology book published within the previous two years. The society provides financial aid to graduate student members through Croasdale Fellowships for enrollment in phycology courses at biological stations, Hoshaw Travel Awards for travel to the annual society meeting, and Grants-In-Aid for supporting research. To join the Phycological Society of America, contact the membership director. Society Webpage: http://www.psaalgae.org/ LOCAL ORGANIZER FOR 2007 PSA/ISOP ANNUAL MEETING: Glen Thursby, US Environmental Protection Agency PSA EXECUTIVE COMMITTEE: President: Richard E. Triemer, Michigan State University Vice President/President Elect: Robert A. Anderson, Bigelow Laboratory for Ocean Sciences Past President: Morgan L. Vis, Ohio University Secretary: J. Craig Bailey, University of North Carolina at Wilmington Treasurer: Charles F. Delwiche, University of Maryland Membership Director: John W. La Claire, University of Texas at Austin Communications Director: Alison R. Sherwood, University of Hawaii Editor, Journal of Phycology: Robert Sheath, California State University San Marcos Student Member Representative: Hilary A. McManus, University of Michigan Chair, Board of Trustees: Paul Kugrens, Colorado State Univeristy Fund Manager of the Endowment: Timothy A. Nelson, Seattle Pacific University PSA BOARD OF TRUSTEES: Paul Kugrens (Chair), Colorado State Univeristy Timothy A. Nelson (Fund Manager), Seattle Pacific University Linda A. Franklin, Smithsonian Environmental Research Center Paul V. Zimba, United States Department of Agriculture Gisèle T. Muller-Parker, Western Washington University Charles F. Delwiche*, University of Maryland Richard E. Triemer**, Michigan State University Robert A. Anderson**, Bigelow Laboratory for Ocean Sciences *ex-officio member **ex-officio and non-voting member i THE INTERNATIONAL SOCIETY OF PROTISTOLOGISTS The International Society of Protistologists (ISOP) is an association of scientists devoted to research on single-celled eukaryotes, or protists. The ISOP promotes the presentation and discussion of new or important facts and problems in protistology, and works to provide resources for the promotion and advancement of this science. The Society publishes the Journal of Eukaryotic Microbiology, an electronic newsletter, The Stentor, and special publication on protists, including The Illustrated Guide to the Protozoa. Awards of the International Society of Protistologists include the Hutner Award for outstanding contribution to protistology by young investigators, the Jahn-Bovee Award for best student presentation at the annual meeting, the Corliss Ciliate Systematics Award for best publication in the field during a 2-year period, and the Trager Award for best publication in a volume of the Journal of Eukaryotic Microbiology. The Holz-Connor Travel Fund provides financial assistance for students and young investigator to attend the annual meeting. To join the International Society of Protistologists and learn more about its activities go to http://www.uga.edu/~protozoa/. ISOP EXECUTIVE COMMITTEE President: Wilhelm Foissner Universität Salzburg, Austria President-Elect: Samuel Bowser, Wadsworth Center, USA Past Presidents: Wayne Coats, Smithsonian Environmental Res. Center, USA David Caron, University of Southern California, USA Vice President: Igor Dovgal, Schmalhausen Institute of Zoology, Ukraine Secretary: Harriett Smith-Somerville, University of Alabama, USA Membership Secretary: Christine Sundermann, Auburn University, USA Treasurer: Nigel Yarlett, Pace University, USA Editor-in-Chief: Denis Lynn, Guelph University, Canada Student Representative: Aaron Bell, Albert Einstein College of Medicine, USA At Large Members: Ron Fayer, USDA, ARS, USA Laura Katz, Smith College, USA Michael Levandowsky, Pace University, USA George McManus, University of Connecticut, USA Elzbieta Wyroba, Polish Academy of Sciences, Poland SOCIETY AND AFFILIATES British Society of Protozoologists (BSSP) Czech Section (Czech Society of Parasitologists) East Coast Section (USA) German Society of Protozoologists Groupement des Protistologues de Langue Francaise Società Italiana di Protozoologia Israel Society for Parasitology, Protozoology and Tropical Diseases Korean Protozoologists Russian Society Scandinavian Section Ukraine Protistology ii Welcome to Rhode Island Rhode Island is the smallest state in the United States, but it has the longest name. Its official name is the State of Rhode Island and Providence Plantations. It covers an area of only 1,214 square miles. Its distance north to south is 48 miles, and east to west only 37 miles. In spite of its small size, because of Narragansett Bay and its numerous islands Rhode Island has a total linear coast line of almost 400 miles—which explains why it’s called the Ocean State. Roger Williams founded the first permanent white settlement in Rhode Island at Providence in 1636 on land purchased from the Narragansett Indians. In doing so he established the first working model of democracy after he was banished from Plymouth, Massachusetts because of his “extreme views” concerning freedom of speech and religion. At the start of the Revolutionary War, Rhode Islanders were among the first colonists to take action against British rule and on May 4, 1776, Rhode Island was the first of the original thirteen colonies to renounce allegiance to Great Britain and declare independence. Rhode Island’s independent spirit was still evident at the close of the Revolutionary War. It was the last of the thirteen colonies to ratify the U.S. Constitution, demanding that the Bill of Rights, which guaranteed individual liberties, be added. Thomas Jefferson and John Adams both acknowledged Roger Williams, as the originator of the concepts and principles reflected in the First Amendment. Among those principles were freedom of religion, freedom of speech, and freedom of public assembly. Famous Rhode Islanders George M. Cohan: Singer, dancer, producer, actor, playwright and composer—the first artist/entertainer to be honored by Congress. In 1936, he received a Congressional Gold Medal in recognition for his patriotic songs Over There and A Grand Old Flag. Gilbert Stuart: Foremost painter of portraits of George Washington, John Adams, Thomas Jefferson, James Madison and James Monroe. The Rhode Island state capitol houses the historic painting of George Washington by Gilbert Stuart which appears on the $1 dollar bill. Nathanael Greene: Revolutionary War general, second-in-command to George Washington. Esek Hopkins: First Commander-in-Chief of the Continental Navy. Anne Hutchinson: The first woman to establish a town in America—Portsmouth, Rhode Island. Nap Lajoie: The American League’s first batting champion and an inductee into the Basefall Hall of Fame. Samuel Slater: Father of the American Textile Industry above mostly from www.visitrhodeisland.com/facts_history/history.aspx iii Grand Ballroom (Salons III, IV & V) Salons (I & II) Bristol A&B Continental Breakfast (6:50-7:50 am) Rotunda PSA/ISOP Joint Symposium on Symbiosis (8:00-9:50 am) Mid-Morning Break (9:50-10:20 am) Grand Foyer PSA/ISOP Joint Symposium on Symbiosis (10:20-11:50 am) Lunch Break: Ticketed (pre-paid) in Rotunda at noon MONDAY PSA Bold Award 1 (1:30-3:30 pm) ISOP Ecology/Symbiosis (1:50-3:30 pm) Mid-Afternoon Break (3:30-3:50 pm) Grand Foyer PSA Bold Award 1 (3:50-5:30 pm) ISOP Ecology/Symbiosis (3:50-5:30 pm) PSA/ISOP Auction and Mixer (7:00 - 9:30 pm) Grand Foyer Continental Breakfast (6:50-7:50 am) Rotunda PSA Special Session: Physiological & ISOP Special Session: Drug Targets in Structural Advantages of Chloroplast Parasitic Protists (8:00-9:50 am) Evolution (8:00-10:00 am) Mid-Morning Break (PSA: 10:00-10:30 am--ISOP 9:50-10:20 am) Grand Foyer ISOP: Special Session cont'd & Contributed PSA Bold Award 2 (10:30 am-12:10 pm) Papers: Cell Biology/Physiology/Behavior (10:20 am- noon) Lunch Break: Ticketed (pre-paid) in Rotunda at noon / PSA Student-Post Doc Lunch in Atrium at noon TUESDAY ISOP Hutner Lecture & ISOP Symposium: PSA Contributed Papers: Physiology & PSA Contributed Papers: Ecology & Population Biogeochemical Cycling (1:30 - 3:30 pm) Biochemistry (2:30-4:10 pm) Biology 1 (2:30-4:10 pm) Mid-Afternoon Break (ISOP 3:30-3:50 pm: PSA 4:10-4:30 pm) Grand Foyer ISOP Symposium: Biogeochemical Cycling PSA Business Meeting (4:30-? pm) cont'd (3:50-4:50 pm) PSA Student/Postdoc Mixer (8:00 pm - 10:00 pm) Rotunda iv Grand Ballroom (Salons III, IV & V) Salons (I & II) Bristol A&B Continental Breakfast (6:50-7:50 am) Rotunda PSA Special Session: Phylogenetics, ISOP Special Platform Session: Protists & The Systematics, & Biogeography of Macroalgae Molecular & Informatics Revolution (8:00 - 10:00 am) (8:10-10:00 am) Mid-Morning Break (10:00-10:30 am) Grand Foyer PSA Contributed Papers: Phylogenetics & PSA Contributed Papers: Cellular & ISOP Special Session Cont'd (10:30-11:50 am)
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  • Lateral Gene Transfer of Anion-Conducting Channelrhodopsins Between Green Algae and Giant Viruses

    Lateral Gene Transfer of Anion-Conducting Channelrhodopsins Between Green Algae and Giant Viruses

    bioRxiv preprint doi: https://doi.org/10.1101/2020.04.15.042127; this version posted April 23, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 1 5 Lateral gene transfer of anion-conducting channelrhodopsins between green algae and giant viruses Andrey Rozenberg 1,5, Johannes Oppermann 2,5, Jonas Wietek 2,3, Rodrigo Gaston Fernandez Lahore 2, Ruth-Anne Sandaa 4, Gunnar Bratbak 4, Peter Hegemann 2,6, and Oded 10 Béjà 1,6 1Faculty of Biology, Technion - Israel Institute of Technology, Haifa 32000, Israel. 2Institute for Biology, Experimental Biophysics, Humboldt-Universität zu Berlin, Invalidenstraße 42, Berlin 10115, Germany. 3Present address: Department of Neurobiology, Weizmann 15 Institute of Science, Rehovot 7610001, Israel. 4Department of Biological Sciences, University of Bergen, N-5020 Bergen, Norway. 5These authors contributed equally: Andrey Rozenberg, Johannes Oppermann. 6These authors jointly supervised this work: Peter Hegemann, Oded Béjà. e-mail: [email protected] ; [email protected] 20 ABSTRACT Channelrhodopsins (ChRs) are algal light-gated ion channels widely used as optogenetic tools for manipulating neuronal activity 1,2. Four ChR families are currently known. Green algal 3–5 and cryptophyte 6 cation-conducting ChRs (CCRs), cryptophyte anion-conducting ChRs (ACRs) 7, and the MerMAID ChRs 8. Here we 25 report the discovery of a new family of phylogenetically distinct ChRs encoded by marine giant viruses and acquired from their unicellular green algal prasinophyte hosts.
  • WA488 3831 P1825-T43-Nr4 AP.Pdf

    WA488 3831 P1825-T43-Nr4 AP.Pdf

    Acta Protozool. (2004) 43: 291 - 301 Syndrome of the Failure to Turn off Mitotic Activity in Tetrahymena thermophila: in cdaA1 Phenotypes Ewa JOACHIMIAK, Janina KACZANOWSKA, Mauryla KIERSNOWSKA and Andrzej KACZANOWSKI Department of Cytophysiology, Institute of Zoology, Warsaw University, Warsaw, Poland Summary. During early micronuclear mitosis of a wild type Tetrahymena thermophila, basal body proliferation and cortical growth are localized in the equatorial region of the pre-dividing cell. These processes are arrested prior to cytokinesis when the fission line gaps appear in ciliary rows. Then a putative marker of cellular polarity, the fenestrin antigen, appears in the apical zone of the dividing cell and around the old oral apparatus (OA1) and in the cortex localized posterior to the fission line gaps and around the new oral apparatus (OA2) i.e. in the apical cortex of the prospective posterior daughter cell. Prior to cytokinesis, the membranelles within OA1 and OA2 oral apparatuses are strongly labeled with the MPM2 antibody against mitotic phosphoproteins. The transition to cytokinesis is correlated with disappearance of both the polar fenestrin staining and of the phosphoprotein antigens in OA1 and OA2. cdaA1 (cell division arrest) mutant cells grown at the restrictive temperature do not produce a fission line and they do not undergo cytokinesis thereby generating irregular chains. The cdaA1 phenotypes continue elongation of their ciliary rows in equatorial regions, mostly without formation of the fission line gaps, accompanied with repetitive micronuclear mitoses and repetitive formation of the defective oral structures. In cdaA1 cells at restrictive temperature, the fenestrin antigen was recruited and then permanently found in the apical regions and around all oral apparatuses, and was always absent in equatorial regions, in spite of variability of immunostaining patterns, sizes and advancement of organization of OAs in different specimens of the same sample.