Latest 83 Papers

Evolution of HMA-integrated tandem kinases accompanied by expansion of target pathogens

Authors: Asuke, S., Tagle, A. G., Hyon, G.-S., Koizumi, S., Murakami, T., Horie, A., Niwamoto, D., Katayama, E., Shibata, M., Takahashi, Y., Islam, M. T., Matsuoka, Y., Yamaji, N., Shimizu, M., Terauchi, R., Hisano, H., Sato, K., Tosa, Y.

Date: 2025-12-16 · Version: 1
DOI: 10.64898/2025.12.15.692859

Category: Plant Biology

Model Organism: Multi-species

AI Summary

The study cloned the resistance genes Rmo2 and Rwt7 from barley and wheat, revealing them as orthologous tandem kinase proteins (TKPs) with an N‑terminal heavy metal‑associated (HMA) domain. Domain‑swapping experiments indicated that the HMA domain dictates effector specificity, supporting a model of TKP diversification into paralogs and orthologs that recognize distinct pathogen effectors.

tandem kinase proteins HMA domain disease resistance barley wheat

Targeting granule initiation and amyloplast structure to create giant starch granules in wheat

Authors: McNelly, R., Esch, L., Ngai, Q. Y., Pohan, K., Stringer, R., Fahy, B., Warren, F., Seung, D.

Date: 2025-12-15 · Version: 1
DOI: 10.64898/2025.12.12.693964

Category: Plant Biology

Model Organism: Triticum aestivum

AI Summary

Mutations in the plastid division gene PARC6 and the granule initiation gene BGC1 were combined to generate wheat plants with dramatically enlarged A-type starch granules, some exceeding 50 µm, without affecting plant growth, grain size, or overall starch content. The parc6 bgc1 double mutant was evaluated in both glasshouse and field trials, and the giant granules displayed altered viscosity and pasting temperature, offering novel functional properties for food and industrial applications.

starch granule size PARC6 BGC1 wheat giant starch granules

A photoprotection dial maps holistic light-stress response in diatoms

Authors: Croteau, D., Jaubert, M., Quemar, T., Falciatore, A., Maes, A., Bailleul, B.

Date: 2025-12-15 · Version: 1
DOI: 10.64898/2025.12.11.693581

Category: Plant Biology

Model Organism: Phaeodactylum tricornutum

AI Summary

Using ten Phaeodactylum tricornutum mutant strains with graded constitutive Lhcx1 expression, the study links NPQ induction under high light to physiological outcomes (oxidized QA, increased cyclic electron flow) and extensive transcriptomic reprogramming, affecting nearly half the genome. The approach demonstrates that higher NPQ mitigates PSII damage, boosts ATP production for repair, and drives distinct gene regulatory networks, providing a model framework for dissecting photosynthetic and gene expression integration.

non-photochemical quenching Phaeodactylum tricornutum high-light stress transcriptomics photosynthetic regulation

Molecular response of the diatom Coscinodiscus granii and its co-occurring dictyochophyte during Lagenisma coscinodisci parasite infection

Authors: Orvain, C., Bertrand, L., Moussy, A., Porcel, B. M., Vallet, M., Carradec, Q., Thurotte, A.

Date: 2025-12-12 · Version: 2
DOI: 10.1101/2025.10.10.681168

Category: Plant Biology

Model Organism: Coscinodiscus granii

AI Summary

The study establishes a tractable system using the large bloom-forming diatom Coscinodiscus granii and its natural oomycete parasite Lagenisma coscinodisci, enabling manual isolation of single host cells and stable co-cultures. High‑quality transcriptomes for both partners were assembled, revealing diverse oomycete effectors and a host transcriptional response involving proteases and exosome pathways, while also profiling the co‑occurring heterotrophic flagellate Pteridomonas sp. This tripartite platform provides a unique marine model for dissecting molecular mechanisms of oomycete‑diatom interactions.

diatom‑parasite interactions oomycete effectors Coscinodiscus granii transcriptomics metabolomics

Trichome formation in Nicotiana benthamiana is induced by Agrobacterium

Authors: Chen, J., Hands, P., Patel, M., Yang, L., Zhang, C., Smith, N., Luo, M., Ayliffe, M.

Date: 2025-12-05 · Version: 1
DOI: 10.64898/2025.12.02.691950

Category: Plant Biology

Model Organism: Nicotiana benthamiana

AI Summary

The study demonstrates that infiltrating Nicotiana benthamiana leaves with specific nopaline-type Agrobacterium tumefaciens strains dramatically increases local glandular trichome density within 15 days, an effect linked to the bacterial trans-zeatin synthase (tzs) gene that produces the cytokine trans‑zeatin. This simple Agrobacterium‑mediated approach enables direct comparison of high‑density trichome regions with adjacent isogenic tissue on the same leaf.

trichome density Agrobacterium infiltration trans‑zeatin synthase (tzs) cytokinin trans‑zeatin Nicotiana benthamiana

Glycosylated diterpenes associate with early containment of Fusarium culmorum infection across wheat (Triticum aestivum L.) genotypes under field conditions

Authors: Pieczonka, S. A., Dick, F., Bentele, M., Ramgraber, L., Prey, L., Kupczyk, E., Seidl-Schulz, J., Hanemann, A., Noack, P. O., Asam, S., Schmitt-Kopplin, P., Rychlik, M.

Date: 2025-12-04 · Version: 1
DOI: 10.64898/2025.12.02.691979

Category: Plant Biology

Model Organism: Triticum aestivum

AI Summary

The researchers performed a large‑scale field trial with 105 wheat (Triticum aestivum) genotypes inoculated by Fusarium culmorum, combining quantitative deoxynivalenol (DON) profiling and untargeted metabolomics to uncover molecular signatures of infection. Sesquiterpene‑derived metabolites tracked toxin accumulation, whereas glycosylated diterpene conjugates were enriched in low‑DON samples, indicating a potential defensive metabolic pathway.

wheat Fusarium head blight deoxynivalenol untargeted metabolomics diterpene conjugates

Cytokinin-mediated trichome initiation in Nicotiana benthamiana upon Agrobacterium tumefaciens infiltration

Authors: Saebel, R., Brand, A., Balcke, G. U., Syrowatka, F., Horn, C., Marillonnet, S., Tissier, A. F.

Date: 2025-11-26 · Version: 1
DOI: 10.1101/2025.11.23.690080

Category: Plant Biology

Model Organism: Nicotiana benthamiana

AI Summary

Infiltration of Nicotiana benthamiana leaves with Agrobacterium tumefaciens strain GV3101 carrying the pMP90 Ti plasmid triggers de novo formation of capitate glandular trichomes and elevates acyl‑sugar production, an effect absent with other strains. The responsible factor is the trans‑zeatin synthase (tzs) gene on pMP90, and exogenous application of cytokinins (trans‑zeatin or benzylaminopurine) alone can reproduce trichome induction, linking cytokinin signaling to trichome development. The study highlights that Agrobacterium-mediated transient assays can have unintended developmental and biochemical impacts, recommending strain testing to mitigate such effects.

Agrobacterium tumefaciens Nicotiana benthamiana glandular trichomes cytokinins trans‑zeatin synthase

Evaluating effects of elevated and accelerated NPQ relaxation on yield, physiology and transcription in soybean

Authors: Singh, D., de Souza, A. P., Doran, L., Hansen, J., Burgess, S. J.

Date: 2025-11-20 · Version: 1
DOI: 10.1101/2025.11.19.689310

Category: Plant Biology

Model Organism: Glycine max

AI Summary

The study evaluated a transgenic soybean line (VPZ-34A) expressing Arabidopsis VDE, PsbS, and ZEP for combined improvements in light‑use efficiency and carbon assimilation under ambient and elevated CO2 in a FACE experiment. While VPZ‑34A showed enhanced maximum quantum efficiency of PSII under fluctuating light, it did not increase carbon assimilation efficiency or yield, and transcriptome analysis revealed limited gene expression changes. The results suggest that VPZ‑mediated photosynthetic gains are insufficient to boost productivity under elevated CO2.

photosynthetic efficiency elevated CO2 transgenic soybean VPZ construct transcriptomics

Causes and consequences of experimental variation in Nicotiana benthamiana transient expression

Authors: Tang, S. N., Szarzanowicz, M., Lanctot, A., Sirirungruang, S., Kirkpatrick, L. D., Drako, K., Alamos, S., Cheng, L., Waldburger, L. M., Liu, S., Huang, L., Akyuz Turumtay, E., Kazaz, S., Baidoo, E., Eudes, A., Thompson, M., Shih, P.

Date: 2025-11-20 · Version: 2
DOI: 10.1101/2025.06.12.659391

Category: Plant Biology

Model Organism: Nicotiana benthamiana

AI Summary

The study systematically examines sources of variability in Agrobacterium tumefaciens-mediated transient expression in Nicotiana benthamiana, analyzing a large dataset of 1,915 plants collected over three years. It demonstrates that normalization methods must be validated for each experimental context and provides a statistical model and power analysis framework to determine appropriate sample sizes for detecting specific effect sizes, offering practical guidelines to improve reproducibility in quantitative plant and synthetic biology studies.

Agrobacterium infiltration Nicotiana benthamiana transient expression variability normalization strategies power analysis

SWI3 regulates male sex determination in Marchantia polymorpha

Authors: Quiles, M. L., Raval, P. K., Rensing, S. A., Gould, S. B.

Date: 2025-10-30 · Version: 1
DOI: 10.1101/2025.10.29.685095

Category: Plant Biology

Model Organism: Marchantia polymorpha

AI Summary

The study investigates the role of the chromatin regulator MpSWI3, a core subunit of the SWI/SNF complex, in the liverwort Marchantia polymorpha. A promoter mutation disrupts male gametangiophore development and spermiogenesis, causing enhanced vegetative propagation, and transcriptomic analysis reveals that MpSWI3 regulates genes controlling reproductive initiation, sperm function, and asexual reproduction, highlighting its ancient epigenetic role in balancing vegetative and reproductive phases.

SWI3 chromatin regulation Marchantia polymorpha gametangiophore development transcriptomics
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