title: Seaweeds early development: detrimental effects of desiccation and attenuation by algal extracts.
abstract: The effects of desiccation on the early development stages of Mazzaella laminarioides, Scytosiphon lomentaria and Lessonia nigrescens, algal species with different patterns of distribution across the intertidal zone, were examined in the laboratory. In addition, the protective effect against desiccation was evaluated using algal extracts, including those from Porphyra columbina, a macroalga tolerant to desiccation that lives in the uppermost part of the intertidal zone. Our results showed that M. laminarioides displayed the highest resistance to daily desiccation, followed by S. lomentaria, whereas L. nigrescens was the most susceptible. Spores from L. nigrescens exposed to desiccation, although being able to germinate, ceased further post-germination development. In addition, our results showed that all species exposed to extracts from desiccated P. columbina successfully completed their development and strongly suggest the occurrence of compounds with protective properties that help in attenuating the stress caused by desiccation. Finally, our results indicate that the magnitude of the effects generated by desiccation on the early algal development is related to the position of the species in the intertidal zone, and that the protective effects of P. columbina extracts reveal an exceptional metabolism of this species under desiccation stress.
authors: Departamento de Ecología y Biodiversidad, Facultad de Ecología y Recursos Naturales, Universidad Andrés Bello, República 470, 8370251 Santiago, Chile. lorettocontreras@unab.cl
authors: Loretto
authors: L
authors: Contreras-Porcia
authors: Sebastián
authors: S
authors: Callejas
authors: Daniela
authors: D
authors: Thomas
authors: Camille
authors: C
authors: Sordet
authors: Georg
authors: G
authors: Pohnert
authors: Aníbal
authors: A
authors: Contreras
authors: Ana
authors: A
authors: Lafuente
authors: María R
authors: MR
authors: Flores-Molina
authors: Juan A
authors: JA
authors: Correa
mesh_terms: D002470:Cell Survival; D002853:Chromatography, Liquid / Q000379:methods; D003890:Desiccation; D055442:Metabolome; D010936:Plant Extracts / Q000378:metabolism / Q000494:pharmacology*; D010940:Plant Proteins / Q000378:metabolism / Q000494:pharmacology; D044664:Porphyra / Q000378:metabolism* / Q000502:physiology; D012624:Seaweed / Q000187:drug effects / Q000254:growth & development* / Q000502:physiology; D013045:Species Specificity; D021241:Spectrometry, Mass, Electrospray Ionization; D013170:Spores / Q000254:growth & development / Q000502:physiology; D013312:Stress, Physiological
chemical_list: D010936:Plant Extracts; D010940:Plant Proteins