The Ursinus Weekly, January 8, 1940

Byrne and McAllister to head junior week-end committees • Hon. J. William Ditter to speak on Founders\u27 Day, February 15 • Lorelei on Feb. 16; Harshaw chairman • Besse Howard will lead quiz forum • Apes win fraternity scholarship plaque • Dr. Francis Green at vespers Sunday • Dickinson law dean to speak to pre-legalites • Fred Wrigley to return for dance on Saturday • Mr. Sheeder lauds Christmas \u27Lantern\u27 • College students think that United States can stay out of conflict, survey shows • Fraternity rushing rules • Skyrocket to fame tells story of singer Jan Peerce\u27s career • Science building is outstanding change on Ursinus landscape in last decade • Dr. Meminger honored by new autumn Alumni Journal • Grizzly five tramples Albright in conference opener; loses to Rutgers in first game before holidays, 60-55 • Stevens optimistic as proteges drill • Albright freshmen top bear yearlings, 55-36 • Biery on Delaware all-opponents • Play ball, America! to be shown on Thursday • Bears meet Muhlenberg, Gettysburg this week • Barnard, Carter at conventions during holidays • Prof. Sheeder lists religious qualities at vespers service • Morris represents Ursinus at Canadian Christian conference • Brownback speaks to men\u27s faculty club at Tues. meeting • Hall Chemical Society will show film, Sincerely yours • Bone to speak to men\u27s Debate Club in Freeland Hall tonight • Borrell and Seibert represent college in Penn State debatehttps://digitalcommons.ursinus.edu/weekly/1831/thumbnail.jp

Expression and trans-specific polymorphism of self-incompatibility RNases in Coffea (Rubiaceae)

Self-incompatibility (SI) is widespread in the angiosperms, but identifying the biochemical components of SI mechanisms has proven to be difficult in most lineages. Coffea (coffee; Rubiaceae) is a genus of old-world tropical understory trees in which the vast majority of diploid species utilize a mechanism of gametophytic self-incompatibility (GSI). The S-RNase GSI system was one of the first SI mechanisms to be biochemically characterized, and likely represents the ancestral Eudicot condition as evidenced by its functional characterization in both asterid (Solanaceae, Plantaginaceae) and rosid (Rosaceae) lineages. The S-RNase GSI mechanism employs the activity of class III RNase T2 proteins to terminate the growth of "self" pollen tubes. Here, we investigate the mechanism of Coffea GSI and specifically examine the potential for homology to S-RNase GSI by sequencing class III RNase T2 genes in populations of 14 African and Madagascan Coffea species and the closely related self-compatible species Psilanthus ebracteolatus. Phylogenetic analyses of these sequences aligned to a diverse sample of plant RNase T2 genes show that the Coffea genome contains at least three class III RNase T2 genes. Patterns of tissue-specific gene expression identify one of these RNase T2 genes as the putative Coffea S-RNase gene. We show that populations of SI Coffea are remarkably polymorphic for putative S-RNase alleles, and exhibit a persistent pattern of trans-specific polymorphism characteristic of all S-RNase genes previously isolated from GSI Eudicot lineages. We thus conclude that Coffea GSI is most likely homologous to the classic Eudicot S-RNase system, which was retained since the divergence of the Rubiaceae lineage from an ancient SI Eudicot ancestor, nearly 90 million years ago.United States National Science Foundation [0849186]; Society of Systematic Biologists; American Society of Plant Taxonomists; Duke University Graduate Schoolinfo:eu-repo/semantics/publishedVersio

The Ursinus Weekly, December 11, 1939

Communion and party in gym will feature Christmas week • Snyder plans new Lantern make-up • Messiah pleases capacity audience • Wood to head interfraternity-sorority dance on January 13 • McClures to entertain women tonight and tomorrow evening • 13 members added to Weekly staff • Sr. play portrays conflicts of Irish Catholicism • Senior ball draws 140 couples to dance to Gordon\u27s orchestra • Russo-Finnish conflict to be discussed by Herber at IRC • Pres. McClure will speak to Brotherhood at meeting Tuesday • Students reveal opinion on editorial comments • First I.R.C. Quarterly under Yoh released • Student poll describes ideal Ursinus professor • Veteran five ready to open season against Rutgers at New Brunswick Saturday; Chern, Keehn will swap posts • Co-ed basketeers down Rosemont in exhibition • The fall seasons in review: football and soccer • Frosh court candidates begin practice tonight • Collection of Madonnas is exhibited in libraryhttps://digitalcommons.ursinus.edu/weekly/1830/thumbnail.jp