Matevz Papp-Rupar, Emily R. Grace, Naina Korotania, Maria-Laura Ciusa, Robert W. Jackson, Mojgan Rabiey

Isolation of phages targeting the cherry pathogen Pseudomonas syringae pv. syringae (Pss) led to five distinct phage genotypes. Building on previous in vitro coevolution experiments, the coevolution of the five phages (individually and as a cocktail) with Pss on cherry leaves was conducted in glasshouse and field experiments. Phages effectively reduced Pss numbers on detached leaves, with no evidence of phage resistance emerging in the bacterial population. Field application of phages in a cherry orchard in Southeast England evaluated phage survival, viability and impact on bacterial populations and the microbial community. The bacterial population and phages persisted in the leaf and shoot environment as long as the bacterial host was present. In contrast to in vitro studies, the plant environment constrained the emergence of phage resistant Pss populations.

Environmental Microbiology. March 2025

Niba Rawlings, Ngwa, Bailey, Mark and Courtenay, Orin

This systematic review and meta-analysis of data specific to military populations aims to identify knowledge gaps to mitigate sand fly exposure and Leishmania transmission during deployments. Regular use of long-lasting insecticidal nets to mitigate sand fly exposure demonstrated high potential effectiveness than other reported personal protective measures (PPMs) which yielded mixed or inconclusive results. In summary, the systematic review revealed the substantial variability between study designs and statistical integrity. There is need for more consistent and robustly designed studies including well-define controls and replication. Future studies would be advised to explore the long-term effectiveness and practicality of PPMs, both individually and in combination, across diverse deployment settings.

PLoS Neglected Tropical Diseases. March 2025

Logan Kistler, Fabio de Oliveira Freitas, Rafal M. Gutaker, S. Yoshi Maezumi, Jazmín Ramos-Madrigal, Marcelo F. Simon, J. Moises Mendoza Flores, Sergei V. Drovetski, ¬Hope Loiselle, Eder Jorge de Oliveira, Eduardo Alano Vieira, Luiz Joaquim Castelo Branco Carvalho, Marina Ellis Perez, Audrey T. Lin, Hsiao-Lei Liu, Rachel Miller, Natalia A. S. Przelomska, Aakrosh Ratan, Nathan Wales, Kevin Wann, Shuya Zhang, Magdalena García, Daniela Valenzuela, Francisco Rothhammer, Calogero M. Santoro, Alejandra I. Domic, José M. Capriles, Robin Allaby

Manioc—also called cassava and yuca—is among the world’s most important crops, originating in South America in the early Holocene. Domestication for its starchy roots involved a near-total shift from sexual to clonal propagation, and almost all manioc worldwide is now grown from stem cuttings. In this work, we analyze 573 new and published genomes, focusing on traditional varieties from the Americas and wild relatives from herbaria, to reveal the effects of this shift to clonality. We observe kinship over large distances, maintenance of high genetic diversity, intergenerational heterozygosity enrichment, and genomic mosaics of identity-by-descent haploblocks that connect all manioc worldwide. Interviews with Indigenous traditional farmers in the Brazilian Cerrado illuminate how traditional management strategies for sustaining, diversifying, and sharing the gene pool have shaped manioc diversity.

Science. March 2025

Press release

Jennifer Byrne, Robert Lillywhite, Henry Creissen, Fiona Thorne, Lael Walsh

Integrated Pest Management (IPM) is a crop health paradigm offering a framework for sustainable pest management. To optimise adoption it is necessary to understand how growers use IPM, to identify measures lagging in uptake or suitability for uptake and to explore limitations to both. This study has quantified IPM adoption using Irish food horticulture as a case study, through the development and application of an IPM metric based on field, protected and top fruit production systems. While our results demonstrated that IPM has been adopted, it also suggested that there is room for improvement. This presentation of an IPM measurement instrument for temperate horticulture systems provides the means to benchmark IPM performance and chart cumulative progress. This is useful to policy makers and IPM stakeholders to compare performance on a national and cross-national basis with a view to refining best practice, while defining specific components of IPM for improvement.

Crop Protection. February 2025

Glen Guyver-Fletcher, Erin E. Gorsich, Chris Jewell, Michael J. Tildesley

In this article we present a spatially-explicit stochastic metapopulation model to simulate the spread and control of foot-and-mouth disease (FMD) in an endemic setting. We parameterise and validate the model using detailed outbreak data from the Republic of Turkey, 2001–2012. Subsequently, we assess the efficacy of ring vaccination, mass vaccination, and livestock movement restrictions with regards to incidence-reduction and likelihood of eradication. Our results suggest countries wishing to control the disease within their borders should focus on comprehensive surveillance and vaccination campaigns as their main policy goals. In summary, vaccination-based policies are more effective than movement restrictions in the endemic context.

Infectious Disease Modelling.; February 2025

Huazhen Liu, Lakshminarayan M. Iyer, Paul Norris, Ruiying Liu, Keshun Yu, Murray Grant, L. Aravind, Aardra Kachroo & Pradeep Kachroo

Dietary consumption of lysine in humans leads to the biosynthesis of Δ¹-piperideine-6-carboxylic acid (P6C), with elevated levels linked to the neurological disorder epilepsy. Here we demonstrate that P6C biosynthesis is also a critical component of lysine catabolism in Arabidopsis thaliana. P6C regulates vitamin B6 homeostasis, and increased P6C levels deplete B6 vitamers, resulting in compromised plant immunity. We further establish a key role for pyridoxal and pyridoxal-5-phosphate biosynthesis in plant immunity. Our analysis indicates that P6C metabolism probably evolved through combining select lysine and proline metabolic enzymes horizontally acquired from diverse bacterial sources at different points during evolution. More generally, certain enzymes from the lysine and proline metabolic pathways were probably recruited in evolution as potential guardians of B6 vitamers and for semialdehyde detoxification.

Nature Plants. February 2025