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Dibutyl Dithiophosphate Increases Radish and Bush Beans Growth
(American Society for Horticultural Science, 2025-10)
Esquivel-Cervantes, Luis Fernando
;
Zidack, Nina
;
Oiestad, Alanna J.
;
Bowden, Ned B.
;
Martin, John M.
Hydrogen sulfide (H2S) is a gasotransmitter that can promote growth and protect plants from environmental stressors. In this study, we tested the impact of dibutyl dithiophosphate (DBDTP), which releases H2S as it is metabolized by plants, upon radish and bush bean growth. Experiments examined applications of DBDTP as a seed treatment in combination with soil drenches, and as a foliar spray under greenhouse and field conditions. In greenhouse trials, one application of 12.5 mM DBDTP as a seed treatment plus three applications of 0.5 mM DBDTP as a soil drench increased radish fresh and dry weight by 4%. Under field conditions, seed treatment using a solution of 12.5 or 25 mM DBDTP increased radish plant biomass by 5% to 7%, while radish root fresh weight was increased by 7.3% and 12.4%, respectively. We also examined the phytotoxicity of DBDTP foliar sprays and found that 0.5 mM DBDTP led to foliar damage at 8 and 15 d after germination. Bush bean seeds were treated with DBDTP at 12.5 mM, 25 mM, and 50 mM concentrations leading to trends of increased fresh weight and pod fresh weight. Our results suggest that DBDTP shows potential as an H2S donor to enhance plant growth as a seed treatment. However, the mixed responses in seed treatments and the observed foliar phytotoxicity indicate that further research is required before broad use in agricultural settings can be recommended.
Honey Bee Viromes from Beekeeping Operations Experiencing High Losses in 2022–2023
(MDPI AG, 2026-03)
Jones, Boone H.
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Reams, Taylor
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Jonas, Lauren
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Hopkins, Brandon K.
;
Flenniken, Michelle L.
Recent high annual losses of honey bee (Apis mellifera) colonies, averaging 40% in the United States from 2008 to 2025, are concerning for beekeepers, growers, policy makers, and scientists. Viruses, the most abundant group of honey bee pathogens, impact honey bee fitness and contribute to colony losses. Several studies have utilized next-generation sequencing (NGS) technologies to discover new honey beeinfecting viruses and expand our understanding of the honey bee virome. Herein, we examined the viromes of honey bees obtained from longitudinally monitored, commercially managed colonies that experienced population decline (average ~44%) during the 2022–2023 beekeeping season. We hypothesized new viruses or virus genome variants may be associated with these declines. To test this hypothesis, we sequenced RNA obtained from virus-augmented honey bee samples from representative colonies managed by four beekeeping operations in California. We discovered three undescribed partitivirus-like sequences that were prevalent and abundant in all beekeeping operations, a new Lake Sinai virus, and a sequence variant of acute bee paralysis virus. In addition, we re-sequenced the genomes of 16 previously characterized bee and/or Varroa destructor mite infecting viruses and two previously described, but not well-characterized, partitivirus-like sequences (i.e., Apis mellifera associated partiti-like virus 1 and Hubeipartiti-like virus 34). Virus abundance was greater in libraries representing colonies that died during the monitoring period.
Photovoice Utilization for Research in Cancer Survivors: A Systematic Review
(Wiley, 2026-03)
Hoover, Rebecca L.
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Xu, Jingle
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Hammersla, Margaret
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Garcia, Brian
;
Betancur, Stephanie
Purpose. Photovoice integrates photography with narrative storytelling to examine lived experiences of participants. This review synthesizes the applications of photovoice in cancer survivorship research, focusing on study populations, emergent themes, and employed methods. Methods. We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines for this review. We searched PubMed, CINAHL, and Scopus from database inception through April 12, 2025. Two reviewers independently screened 325 records in Covidence and extracted study characteristics, methods, key findings, and recommendations from the included studies. We used narrative synthesis to integrate the findings of the included studies. We appraised study quality using the Critical Appraisal Skills Program (CASP) Qualitative Checklist and excluded the studies rated weak. Results. Twenty-six studies were included. Sample sizes ranged from 3 to 316; 20/26 studies enrolled 20 participants or fewer with male survivors were underrepresented (7/26 studies were female only). Findings were clustered into four domains: psychosocial and emotional experiences (26/26), systems of care and structural barriers (19/26), agency/expression/advocacy (23/26), and health behavior/lifestyle change (6/26). Studies rarely reported community dissemination, participant co-analysis/member checking, or detailed ethical protocols. Conclusions. Photovoice is increasingly used to capture survivor perspectives, but the depth of participation and consistency of reporting vary. By centering survivor perspectives rarely captured in survivorship research, this study addresses a critical gap and generates insights to inform patient-centered survivorship care. Future work should strengthen transparent methods reporting, ethical safeguards (including confidentiality and image ownership), inclusive recruitment strategies, and integration of photovoice into interventions and policy efforts.
Role of Sparsely Glacierized Basins and Groundwater in Semiarid Andes Periglacial Headwaters
(Wiley, 2025-10)
Valois, Rémi
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Navarro, Gonzalo
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MacDonell, Shelley
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Buvat, Solène
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de Pasquale, Giula
A better understanding of headwater hydrogeology in the semiarid Andes is critical because high-elevation basins are considered water towers for the main valleys, where water demand is over-allocated. While the body of literature generally focuses on the contribution of glaciers to streamflow, there is little information on the contribution of sparsely glacierized basins and the origins and processes of groundwater generation at high elevations. The Corrales catchment in North-Central Chile contains both heavily and sparsely glacierized sub-basins as well as the highest public borehole in the region, making it suitable to fill such scientific gaps. Geophysical surveys and a pumping test were carried out to obtain information on groundwater flows beneath the Tapado terminal rock glacier and a main tributary of the Elqui River. Radioactive and stable isotopes were used to characterise the hydrological connectivity and the origins of water in the headwater basins. Low electromagnetic velocities and resistivities indicate the presence of liquid water beneath the rock glacier, suggesting the upper limit of a proglacial aquifer. The downstream valley aquifer appears transmissive and dominated by old waters (several decades) that are a mix of high-glacierized and sparsely glacierized basins. In addition, stable isotopes reveal distinct signatures for high-glacierized and sparsely glacierized basins, which may be attributed to isotope fractionation. These results suggest that water isotopes can be used to distinguish between waters originating from high-glacierized and sparsely glacierized basins. The study also identifies the presence of old waters in the sparsely glacierized basins, which indicates long-term storage, slow release or slow turnover times. This finding is crucial for understanding the evolution of late-season baseflow and streamflow in the context of climate change. As the contribution of such basins to total streamflow is significant, a better understanding of hydrological processes in sparsely glacierized regions is required.
Hydrogen Sulfide Released by Dibutyl Dithiophosphate Increases Potato Growth and Yield
(Springer Science and Business Media LLC, 2026-02)
Esquivel-Cervantes, Luis Fernando
;
Zidack, Nina
;
Oiestad, Alanna
;
Bowden, Ned
;
Martin, John M.
Hydrogen sulfide is a plant gasotransmitter that can increase plant growth. Application of compounds that slowly release hydrogen sulfide (H2S) is emerging as a method to increase plant growth and yield. This study investigated how dibutyl dithiophosphate (DBDTP), which releases H2S when metabolized by a plant, impacts potato growth and development. Two commonly grown potato varieties, Russet Burbank (RB) and Clearwater (CW), were grown under tissue culture, field, and growth chamber conditions with varying amounts of DBDTP. Potato root length was increased in tissue culture when DBDTP was included in the media at 0.025 and 0.1 mM. Potato plant height was also increased, though not significantly, at 0.05 mM DBDTP, while 0.2 mM DBDTP significantly reduced plant height. Under field conditions, potato yield was increased when DBDTP was applied as a 0.5 mM soil drench in 2023. Treated plants yielded 57.9 g per plant, compared to 33.5 g per plant for control plants, with a positive trend detected in 2024. Foliar sprays containing 0.5 mM DBDTP did not cause any visible damage to potato leaves when applied eight days after transplanting in growth chambers. DBDTP was associated with increased auxin pathway gene expression at seven and twelve days after DBDTP treatment. This study demonstrates the versatile ways in which DBDTP may be applied to improve potato growth under tissue culture, growth chamber, and field conditions.