Recent Posts

Review. The plant microbiome: From ecology to reductionism and beyond (Annu. Rev. Microbiol.)

The last two decades have witnessed tremendous progress in our understanding of plant microbiota. Fitzpatrick, Salas-González et al. highlight recent discoveries from culture-dependent and culture-independent approaches and discuss the future path towards integrating these approaches. Culture-independent…

Review: An extended root phenotype: the rhizosphere, its formation and impacts on plant fitness (Plant J.)

The rhizosphere is a continuous space for microbial colonization that comprises the rhizospheric soil, the rhizoplane (root surface), and the root endosphere, which is the apoplastic space in the root cortex. It is inhabited by unique populations of microorganisms, influenced by plant genotype and the…

Measuring both microbial load and diversity with a single amplicon sequencing library (bioRxiv)

Amplicon sequencing of microbial DNA is a gold standard for analyzing the relative abundance of microbes in host-associated microbiomes. To gain more accurate insights into microbiome changes, it is crucial to know the absolute abundance of microbes, which can be analyzed by integrating relative abundance…

Rhizosphere microbiome protects plants from a pathogen via iron competition (Nature Microbiol)

Iron is an essential element for most living organisms, including plant-associated bacteria. As iron is insoluble in most soils, many soil-borne bacteria scavenge iron using siderophores, a chemically diverse group of secondary metabolites with a high affinity for iron. Siderophores are known to drive…

Fungal antagonism of Arabidopsis oomycete infection requires a previously uncharacterized secreted hydrolase (bioRxiv)

Antagonist interactions between microbes of the phyllosphere stabilize the microbiome and some “hub” organisms can exert strong effects on community structure. The yeast family Ustilaginales contains several apathogenic species that are microbial antagonists that can inhibit infection from diverse…

A molecular toolkit for screening elite rhizobia (PNAS)

N2-fixing rhizobia bacteria are able to establish symbiotic interactions with legumes in specialized organs called root nodules. Identifying elite rhizobia that are both competitive for nodule occupancy and effective in N2 fixation in agricultural environments is crucial for maximizing the yield of legumes.…

How plants keep their microbiota healthy (Nature)

The large apoplastic intercellular space of plant leaves creates nutrient-rich niches for microbial colonization. To date, whether and how plants control the composition of leaf microbiota is poorly understood. Chen et al. reported that the Arabidopsis quadruple mutant (min7fls2efrcerk1 or mfec)…

Rhizosphere microbiome mediates systemic root metabolite exudation ($) (PNAS)

Roots exude metabolites that affect the composition and activities of their microbiome. Korenblum et al. show that the microbiome in turn affects metabolite exudation, not only locally but also systemically (shown using a split-root system). They call this response SIREM: systemically induced root exudation…

Opinion. A return to the wild: Root exudates and food security (Trends Plant Sci)

My dog is a fantastic companion, but it’s obvious he could never fend for himself; domestication has eliminated his ancestral survival skills. Likewise, most crop plants thrive under human care, but have lost many of the traits that would help them survive in harsh conditions. Preece and Peñuelas…