B. LaSarre

A purine salvage bottleneck leads to bacterial adenine cross-feeding

The paper identifies adenine as a cross-fed metabolite between Rhodopseudomonas palustris and E. coli, revealing a purine salvage bottleneck mechanism.

Nitrous oxide reduction by two partial denitrifying bacteria requires denitrification intermediates that cannot be respired

This study shows that partial denitrifying bacteria can sense and respond to denitrification intermediates they cannot use, revealing regulatory mechanisms for N2O reduction.

Genome-wide analysis of Escherichia coli fitness determinants in a cross-feeding mutualism with Rhodopseudomonas palustris

This study identifies E. coli genes affecting fitness in a mutualistic cross-feeding relationship with R. palustris using RB-TnSeq, revealing both expected and unexpected genetic influences.

Reductive TCA cycle enzymes and reductive amino acid synthesis pathways contribute to electron balance in a Rhodospirillum rubrum Calvin cycle mutant

This study shows that reductive TCA cycle enzymes and reductive amino acid synthesis pathways help maintain electron balance in a Rhodospirillum rubrum Calvin cycle mutant growing on malate or fumarate.

Fermentative Escherichia coli makes a substantial contribution to H2 production in coculture with phototrophic Rhodopseudomonas palustris

This study quantifies the contribution of fermentative E. coli to H2 production in coculture with R. palustris, showing E. coli contributes 32-86% depending on ammonium excretion levels.

Phototrophic lactate utilization by Rhodopseudomonas palustris is stimulated by co-utilization with additional substrates

This study shows that Rhodopseudomonas palustris uses lactate more efficiently when combined with other substrates and exhibits substrate-specific carbon catabolite control.

Diverse spatial organization of photosynthetic membranes among purple nonsulfur bacteria

The paper examines the spatial organization of photosynthetic membranes in purple nonsulfur bacteria, revealing species-specific patterns and their evolutionary implications.

Recipient-Biased Competition For A Cross-Fed Nutrient Is Required For Coexistence Of Microbial Mutualists

The paper investigates how competition for a shared cross-fed nutrient affects mutualism stability between microbial partners, finding that the recipient must have a competitive advantage to maintain the mutualism.

A Rhizobiales-specific unipolar polysaccharide adhesin contributes to Rhodopseudomonas palustris biofilm formation across diverse photoheterotrophic conditions

This paper identifies a Rhizobiales-specific unipolar polysaccharide adhesin essential for biofilm formation in R. palustris under photoheterotrophic conditions but not during photoautotrophy or aerobic respiration.

Growth-independent cross-feeding modifies boundaries for coexistence in a bacterial mutualism

The paper examines how nutrient limitation affects mutualistic bacterial cross-feeding and coexistence using experimental and theoretical approaches.