Synergistic acetic acid and ethanol foliar priming to improve drought tolerance in soybean
A simple, cost-effective foliar spray combining acetic acid and ethanol to enhance drought tolerance and recovery in soybean. In controlled experiments using 7-day water-withdrawal drought, the combined treatment improves biomass, leaf health, and photosynthetic rate, and supports faster recovery compared with either compound alone. The approach targets resource-limited farming systems due to the low cost and broad availability of the inputs.
Overview
Climate-driven drought severely limits crop yields, and traditional breeding or transgenic approaches are time-consuming or carry environmental risks. This solution addresses drought stress through a simple, cost-effective foliar priming strategy using two widely accessible compounds: acetic acid and ethanol. When applied together, these signaling molecules produce synergistic protective effects in soybean, leading to improved growth, leaf health, biomass, photosynthetic performance, and faster recovery from drought-induced damage. Because both compounds are inexpensive and easy to source, the approach is particularly well suited to low-income countries and resource-limited farming systems where rapid deployment matters.
Technical specifications
Key features:
- Foliar spray application of 20 mM acetic acid combined with 20 mM ethanol on soybean
- Validated against 7-day water withdrawal-induced drought in three independent experiments
- Measurable improvements in plant growth, leaf area, leaf-yellowing, biomass, and photosynthetic rate compared to individual treatments
- Faster recovery from drought damage than treatment with either compound alone
- Future work will profile soluble sugars, proline, reactive oxygen species, lipid peroxidation products, and non-enzymatic antioxidants such as ascorbic acid, anthocyanins, and glutathione
- Planned investigation of root architecture, stomatal features, gas exchange, antioxidant enzyme activities (SOD, APX, CAT), and expression of genes linked to abscisic acid signaling, cell wall and antioxidant biosynthesis, and sugar and proline metabolism
Technology readiness level
The combined acetic acid and ethanol priming approach has been validated at the laboratory and controlled-environment scale in soybean, with consistent results across three independent drought experiments demonstrating synergistic mitigation of drought stress. The underlying mechanistic basis is still being characterized, and further work is planned to explore the molecular pathways responsible for the observed synergy. The technology is positioned for additional field validation and scale-up toward practical agricultural deployment.
About Bangabandhu Sheikh Mujibur Rahman Agricultural University
Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU) is a public agricultural university in Salna, Gazipur, established in 1998 from the former Institute of Postgraduate Studies in Agriculture, with a research‑intensive, single‑campus character. On‑site experimental farmland and field laboratories, specialized analytical facilities including an electron microscopy lab, and a campus meteorological station enable controlled trials tied to real‑world conditions. An active extension and technology‑dissemination model connects university innovations to producers and public agencies nationwide. Research is supported by national funding and international development partners. Proximity to major national agricultural research institutes in Gazipur enables coordinated studies and accelerates scale‑up.
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