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Growth responses of Pterocadiella capillacea to light and stocking density

2016; Frontiers Media; Volume: 3; Linguagem: Inglês

10.3389/conf.fmars.2016.05.00075

2296-7745

Rita F. Patarra, Lloveras Anna, Carreiro Ana, Abreu Maria, Buschmann Alejandro, Ana I. Neto,

Algal biology and biofuel production

Event Abstract Back to Event Growth responses of Pterocadiella capillacea to light and stocking density Rita F. Patarra1*, Anna A. Lloveras2, Ana S. Carreiro3, Maria H. Abreu4, Alejandro H. Buschmann5 and Ana I. Neto1 1 cE3c - Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group, University of Azores, Department of Biology, Portugal 2 Universidad de Barcelona, Facultad de Biologia, Spain 3 University of Azores, Department of Biology, Portugal 4 ALGAplus, Prod. e Comerc. de Algas e Seus Derivados, Lda., Portugal 5 Universidad de Los Lagos, Centro i-mar & CeBiB, Chile The agarophyte alga Pterocladiella capillacea has been economically exploited in Azores for agar extraction for many years. Due to a population collapse in the earl’s 1990, harvesting diminished and even stopped but restarted in 2013 and, since then, the species has been severely harvested in this region. To prevent its overexploitation, sustainable harvesting practices should be complemented with research on this species culture potential. This study starts with the evaluation of the effect of different irradiances (30, 70 and 150 μmol photons m-2 s-1) on the relative growth rate (RGR) and productivity of P. capillacea and then, tests the effect of different stocking densities (SD, 0.075, 0.5, 1, 2 and 3 g fw L-1) on its in vitro vegetative growth in Von Stoch’s medium. Overall, P. capillacea didn’t had a viable growth during the entire experimental period with most plants colorless and heavily epiphyted. Mean negative RGR’s (indicating loss of tissue) were recorded, ranging from -1.76±0.80 to -2.31±1.36 % day−1 for entire portions and tips, respectively. Healthier plants were the ones growing in medium SD but productivity was not calculated because algae didn’t grow in any condition during the entire experimental work. The obtained values for the pH of the culture medium in all the experiments did not raise much above 8, suggesting that the algae were not CO2 limited. Other factors (e.g. photoperiod, inorganic nutrients conditions) may be acting as limiting and, therefore, further research should be performed prior drawing a conclusion on the P. capillacea in vitro growing potential. Acknowledgements This study was partially supported by AquaImprov (ON.2), Portuguese National Funds, through FCT – Fundação para a Ciência e a Tecnologia, within the project UID/BIA/00329/2013, CIRN (Centro de Investigação de Recursos Naturais, University of the Azores), and CIIMAR (Interdisciplinary Centre of Marine and Environmental Research, Porto, Portugal). RFP was supported by a doctoral grant M3.1.2/F/024/2011. Keywords: Pterocladiella capillacea, In vitro cultivation, Growth, light intensity, stocking density Conference: XIX Iberian Symposium on Marine Biology Studies, Porto, Portugal, 5 Sep - 9 Sep, 2016. Presentation Type: Oral Presentation Topic: 4. FISHERIES, AQUACULTURE AND BIOTECHNOLOGY Citation: Patarra RF, Lloveras AA, Carreiro AS, Abreu MH, Buschmann AH and Neto AI (2016). Growth responses of Pterocadiella capillacea to light and stocking density. Front. Mar. Sci. Conference Abstract: XIX Iberian Symposium on Marine Biology Studies. doi: 10.3389/conf.FMARS.2016.05.00075 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 02 Sep 2016; Published Online: 02 Sep 2016. * Correspondence: MD. Rita F Patarra, cE3c - Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group, University of Azores, Department of Biology, Ponta Delgada, 9501-801, Portugal, ana.rf.patarra@uac.pt Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Rita F Patarra Anna A Lloveras Ana S Carreiro Maria H Abreu Alejandro H Buschmann Ana I Neto Google Rita F Patarra Anna A Lloveras Ana S Carreiro Maria H Abreu Alejandro H Buschmann Ana I Neto Google Scholar Rita F Patarra Anna A Lloveras Ana S Carreiro Maria H Abreu Alejandro H Buschmann Ana I Neto PubMed Rita F Patarra Anna A Lloveras Ana S Carreiro Maria H Abreu Alejandro H Buschmann Ana I Neto Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.