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Study Sheds Light on Algae's Ability to Respond to Different Levels of Light, Carbon Dioxide

New details about the molecular mechanisms underlying green algae's ability to respond to varying levels of sunlight and carbon dioxide (CO2) are reported in Nature Communications this week. Light and CO2 are substrates of microalgae photosynthesis and their availability often fluctuates. Under strong light, microalgae activate photoprotection to prevent oxidative damage, while low CO2 triggers their CO2 Concentrating Mechanism to raise intracellular CO2 levels. While these processes are vital to algae's survival and represent valuable targets for biological engineering, their underlying transcriptional regulators are largely unknown. Aiming to elucidate the gene regulatory network (GRN) underlying the green algae Chlamydomonas reinhardtii's responses to light and carbon availability, scientists from the University of Potsdam and collaborators used an RNA sequencing compendium of 158 samples from Chlamydomonas cultures exposed to different light and carbon supplies as input to seven benchmarked GRN-inference approaches that employ complementary inference strategies to identify activating and inhibiting regulatory interactions. The results of the five best-performing approaches were combined into a consensus network of Chlamydomonas light- and carbon-dependent transcriptional regulation. "Our study provides an accessible resource to dissect gene expression regulation in this microalga," the scientists write.

The Scan

Machine Learning Helps ID Molecular Mechanisms of Pancreatic Islet Beta Cell Subtypes in Type 2 Diabetes

The approach helps overcome limitations of previous studies that had investigated the molecular mechanisms of pancreatic islet beta cells, the authors write in their Nature Genetics paper.

Culture-Based Methods, Shotgun Sequencing Reveal Transmission of Bifidobacterium Strains From Mothers to Infants

In a Nature Communications study, culture-based approaches along with shotgun sequencing give a better picture of the microbial strains transmitted from mothers to infants.

Microbial Communities Can Help Trees Adapt to Changing Climates

Tree seedlings that were inoculated with microbes from dry, warm, or cold sites could better survive drought, heat, and cold stress, according to a study in Science.

A Combination of Genetics and Environment Causes Cleft Lip

In a study published in Nature Communications, researchers investigate what combination of genetic and environmental factors come into play to cause cleft lip/palate.