Cell-Death Metabolites from var. Identified by Integrating Bioactivity-Based Fractionation and Non-Targeted Metabolomic Approaches.

Epiphytic diatoms growing in Mediterranean seagrass meadows, particularly those of the genus , are abundant and ecologically significant, even in naturally acidified environments. One intriguing aspect of some benthic diatoms is their production of an unidentified cell-death-promoting compound, which induces destruction of the androgenic gland in Leach, 1816, a shrimp exhibiting protandric hermaphroditism, principally under normal environmental pH levels. The consumption of spp.

Responses of the Macroalga Müller to Ocean Acidification Revealed by Complementary NMR- and MS-Based Omics Approaches.

Ocean acidification (OA) is a dramatic perturbation of seawater environments due to increasing anthropogenic emissions of CO. Several studies indicated that OA frequently induces marine biota stress and a reduction of biodiversity. Here, we adopted the macroalga as a model and applied a complementary multi-omics approach to investigate the metabolic profiles under normal and acidified conditions.

Groundwater metabolome responds to recharge in fractured sedimentary strata.

Understanding the sources, structure and fate of dissolved organic matter (DOM) in groundwater is paramount for the protection and sustainable use of this vital resource. On its passage through the Critical Zone, DOM is subject to biogeochemical conversions. Therefore, it carries valuable cross-habitat information for monitoring and predicting the stability of groundwater ecosystem services and assessing these ecosystems' response to fluctuations caused by external impacts such as climatic extremes.

Aquifer system and depth specific chemical patterns in fractured-rock groundwater from the Critical Zone revealed by untargeted LC-MS-based metabolomics.

In the Earth's Critical Zone, water plays an essential role as a collector and transporter of metabolites and their transformation products. It is generally believed that the chemical profiles of groundwater are strongly impacted by land use. However, predictors for the effects of above-ground natural and anthropogenic activities on below-ground chemistry are rare.

Microbial community functioning during plant litter decomposition.

Microbial life in soil is fueled by dissolved organic matter (DOM) that leaches from the litter layer. It is well known that decomposer communities adapt to the available litter source, but it remains unclear if they functionally compete or synergistically address different litter types. Therefore, we decomposed beech, oak, pine and grass litter from two geologically distinct sites in a lab-scale decomposition experiment.

Untargeted Metabolomics Unveil Changes in Autotrophic and Mixotrophic Exposed to High-Light Intensity.

The thermoacidophilic red alga has been optimizing a photosynthetic system for low-light conditions over billions of years, thriving in hot and acidic endolithic habitats. The growth of in the laboratory is very much dependent on light and substrate supply. Here, higher cell densities in under high-light conditions were obtained, although reductions in photosynthetic pigments were observed, which indicated this alga might be able to relieve the effects caused by photoinhibition.

Untargeted Metabolomics Approach Reveals Differences in Host Plant Chemistry Before and After Infestation With Different Pea Aphid Host Races.

The pea aphid (), a phloem-sucking insect, has undergone a rapid radiation together with the domestication and anthropogenic range expansion of several of its legume host plants. This insect species is a complex of at least 15 genetically different host races that can all develop on the universal host plant . However, each host race is specialized on a particular plant species, such as , , or , which makes it an attractive model insect to study ecological speciation.

Modulation of Legume Defense Signaling Pathways by Native and Non-native Pea Aphid Clones.

The pea aphid () is a complex of at least 15 genetically different host races that are native to specific legume plants, but can all develop on the universal host plant . Despite much research, it is still unclear why pea aphid host races (biotypes) are able to colonize their native hosts while other host races are not. All aphids penetrate the plant and salivate into plant cells when they test plant suitability.