27 documents found, page 1 of 3
A novel sexual system in male gametophytes of Laminaria pallida (Phaeophyceae)
Liboureau, Pierre; Pearson, Gareth; Serrao, Ester; Kreiner, Anja; Martins, NeusaBrown algae (Phaeophyceae) exhibit a wide diversity of sexual systems, reproductive modes and life histories. The evolution of this diversity has often involved transitions between sexual systems, which may influence genetic diversity and diversification, and phenotypic evolution. This study reports a novel sexual system in kelp. We identified male gametophyte strains of Laminaria pallida that, despite presenti...
Editorial: Opening the black box of kelps: Response of early life stages to ant...
Martins, Neusa; Coleman, Melinda A.; Wernberg, Thomas; Roleda, Michael Y.Kelps form marine forests along world’s coastlines, providing valuable ecosystem goods and services, either directly as a source offood or medicinal products, or indirectly as biogenic habitats or carbon sink agents (Teagle et al., 2017; Wernberg et al., 2019). However, kelp forests are currently under threat due to anthropogenic climate change with latitudinal range shifts and large-scale declines at a global ...
A low‐latitude species pump: Peripheral isolation, parapatric speciation and ma...
Almeida, Susana C.; Neiva, João; Sousa, Filipe; Martins, Neusa; Cox, Cymon J.; Melo‐Ferreira, José; Guiry, Michael D.; Serrão, Ester A.Geologically recent radiations can shed light on speciation processes, but incomplete lineage sorting and introgressive gene flow render accurate evolutionary reconstruction and interpretation challenging. Independently evolving metapopulations of low dispersal taxa may provide an additional level of phylogeographic information, given sufficiently broad sampling and genome-wide sequencing. Evolution in the mari...
A low‐latitude species pump: Peripheral isolation, parapatric speciation and ma...
Almeida, Susana C.; Neiva, João; Sousa, Filipe; Martins, Neusa; Cox, Cymon; Melo‐Ferreira, José; Guiry, Michael D.; Serrao, Ester; Pearson, GarethGeologically recent radiations can shed light on speciation processes, but incomplete lineage sorting and introgressive gene flow render accurate evolutionary reconstruction and interpretation challenging. Independently evolving metapopulations of low dispersal taxa may provide an additional level of phylogeographic information, given sufficiently broad sampling and genome-wide sequencing. Evolution in the mari...
Population level variation in reproductive development and output in the golden...
Strasser, Fiona-Elaine; Barreto, Luis M.; Kaidi, Soukaina; Sabour, Brahim; A, Serrão; Pearson, Gareth; Martins, NeusaThermal tolerance is often interpreted as a species-wide thermal niche in the absence of studies focusing on the adaptive potential of populations to exhibit differential thermal tolerance. Thus, considering intraspecific thermal plasticity, local adaptation or both between populations along distributional gradients when interpreting and predicting species responses to warming is imperative. Removing the effect...
Microscopic life stages of Arctic kelp differ in their resilience and reproduct...
Silva, Cláudio Figueira; Pearson, Gareth; Serrao, Ester; Bartsch, Inka; Martins, NeusaKelp forests are important habitats in the strongly environmentally and seasonally variable Arctic. There is a critical lack of knowledge about how seasonal conditions and climate change scenarios influence survival and reproduction of kelp early life stages. To better understand the regulation of kelp life cycle processes in this harsh environment we focused on the physiological performance and reproductive su...
Thermal traits for reproduction and recruitment differ between Arctic and Atlan...
Martins, Neusa; Pearson, Gareth; Bernard, Julien; Serrao, Ester; Bartsch, InkaThe plasticity of different kelp populations to heat stress has seldom been investigated excluding environmental effects due to thermal histories, by raising a generation under common garden conditions. Comparisons of populations in the absence of environmental effects allow unbiased quantification of the meta-population adaptive potential and resolution of population-specific differentiation. Following this ap...
Sex-dependent and-independent transcriptional changes during haploid phase game...
Pearson, Gareth; Martins, Neusa; Madeira, Pedro M.; Serrao, Ester; Bartsch, InkaIn haplodiplontic lineages, sexual reproduction occurs in haploid parents without meiosis. Although widespread in multicellular lineages such as brown algae (Phaeophyceae), haplodiplontic gametogenesis has been little studied at the molecular level. We addressed this by generating an annotated reference transcriptome for the gametophytic phase of the sugar kelp, Saccharina latissima. Transcriptional profiles of...
Increased evolutionary rates and conserved transcriptional response following a...
Sousa, Filipe; Neiva, J.; Martins, Neusa; Jacinto, Rita; Anderson, Laura; Raimondi, Peter T.; Serrao, Ester; Pearson, GarethGenome mergers between independently evolving lineages, via allopolyploidy, can potentially lead to instantaneous sympatric speciation. However, little is known about the consequences of allopolyploidy and the resultant "genome shock" on genome evolution and expression beyond the plant and fungal branches of the Tree of Life. The aim of this study was to compare substitution rates and gene expression patterns i...
Hybrid vigour for thermal tolerance in hybrids between the allopatric kelps Lam...
Martins, Neusa; Pearson, Gareth; Gouveia, Licínia; Tavares, Ana I; Serrao, Ester; Bartsch, InkaKelps are globally important bioengineering species with high ecological and economic value, but are increasingly threatened by climate-driven geographic range shifts. The inheritance of economically important traits from parents to offspring is poorly understood in kelps but it is of utmost interest to seaweed farmers wishing to select strains with superior performance and resilience to environmental change. F...