Genomic Insights of -Infective Strains Reveal Unique Genetic Features and New Evidence on Their Host-Restricted Lifestyle.

The present study aimed to use comparative genomics to explore the relationships between and actinorhizal plants using a data set made of 33 genomes. The determinants of host specificity were first explored for "-infective strains" (i.e.

Candidatus Frankia nodulisporulans sp. nov., an Alnus glutinosa-infective Frankia species unable to grow in pure culture and able to sporulate in-planta.

We describe a new Frankia species, for three non-isolated strains obtained from Alnus glutinosa in France and Sweden, respectively. These strains can nodulate several Alnus species (A. glutinosa, A.

Proposal of ' Frankia alpina', the uncultured symbiont of and that forms spore-containing nitrogen-fixing root nodules.

The members of the genus are, with a few exceptions, a group of nitrogen-fixing symbiotic actinobacteria that nodulate mostly woody dicotyledonous plants belonging to three orders, eight families and 23 genera of pioneer dicots. These bacteria have been characterized phylogenetically and grouped into four molecular clusters. One of the clusters, cluster 1 contains strains that induce nodules on spp.

Negative Capacitance and Inverted Hysteresis: Matching Features in Perovskite Solar Cells.

Negative capacitance in the low-frequency domain and inverted hysteresis are familiar features in perovskite solar cells, which origin is still under discussion. Here we use impedance spectroscopy to analyze these responses in methylammonium lead bromide cells treated with lithium cations at the electron-selective layer/perovskite interface and in iodide devices exposed to different relative humidity conditions. Employing the , we obtain a time constant associated with the kinetics of the interaction of ions/vacancies with the surface, τ, in the range of 10-10 s for all the cases exhibiting both features.