Kapraun, Donald F.Ganzon-Fortes, EdnaBird, Kimon T.Trono, GavinoBreden, Chris2025-05-171994-12Kapraun, D. F., Ganzon-Fortes, E., Bird, K. T., Trono, G., & Breden, C. (1994). Karyology and agar analysis of the agarophyte <i>Gelidiella acerosa</i> (Forsskål) Feldmannet Hamel from the Philippines. <i>Journal of Applied Phycology, 6</i>(5), 545–550. https://doi.org/10.1007/BF021824090921-89711573-517610.1007/bf02182409https://hdl.handle.net/20.500.14697/480Microspectrophotometry with the DNA-localizing fluorochrome DAPI demonstrated ploidy level differences in tetrasporophytic and presumptive gametophytic phases of <i>Gelidiella acerosa</i> from the Philippines. Comparison of mean nuclear DNA (I f ) values to chicken erythrocytes (RBC) resulted in an estimate of 0.32 pg/2 C genome. Karyological studies with aceto-orcein revealed a chromosome complement of six bivalents during diakinesis of tetrasporocytes. The agar yield ranges from 13–24% dry weight, depending on the method of extraction. Agar extraction in 1 N NaOH resulted in an increased gel strength of 189 g cm−2 at 1.5% concentration. Infrared spectroscopy indicated a relatively high sulfate content in native agar. The low (61 °) melting temperature is indicative of high sulfation and small molecular size.enMarine algaeArticleSDG 14 - Life below waterseaweedsagarkaryologyChallenge 9: Skills, knowledge, and technology for all