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High doses of ethylenediurea (EDU) as soil drenches did not increase leaf N content or cause phytotoxicity in willow grown in fertile soil

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Title: High doses of ethylenediurea (EDU) as soil drenches did not increase leaf N content or cause phytotoxicity in willow grown in fertile soil
Authors: Agathokleous, Evgenios Browse this author
Paoletti, Elena Browse this author
Manning, William J. Browse this author
Kitao, Mitsutoshi Browse this author
Saitanis, Costas J. Browse this author
Koike, Takayoshi Browse this author →KAKEN DB
Keywords: Air pollution
Soil fertility
Issue Date: Jan-2018
Publisher: Elsevier
Journal Title: Ecotoxicology and environmental safety
Volume: 147
Start Page: 574
End Page: 584
Publisher DOI: 10.1016/j.ecoenv.2017.09.017
PMID: 28923722
Abstract: Ground-level ozone (O₃) levels are nowadays elevated in wide regions of the Earth, causing significant effects on plants that finally lead to suppressed productivity and yield losses. Ethylenediurea (EDU) is a chemical compound which is widely used in research projects as phytoprotectant against O₃ injury. The EDU mode of action remains still unclear, while there are indications that EDU may contribute to plants with nitrogen (N) when the soil is poor in N and the plants have relatively small leaf area. To reveal whether the N content of EDU acts as a fertilizer to plants when the soil is not poor in N and the plants have relatively large total plant leaf area, willow plants (Salix sachalinensis Fr. Schm) were exposed to low ambient O₃ levels and treated ten times (9-day interval) with 200 mL soil drench containing 0, 800 or 1600 mg EDU L⁻¹. Fertilizer was added to a nutrient-poor soil, and the plants had an average plant leaf area of 9.1 m² at the beginning of EDU treatments. Indications for EDU-induced hormesis in maximum electron transport rate (Jmax) and ratio of intercellular to ambient CO₂ concentration (Ci:Cₐ) were observed at the end of the experiment. No other EDU-induced effects on leaf greenness and N content, maximum quantum yield of photosystem II (Fv/Fm), gas exchange, growth and matter production suggest that EDU did not act as N fertilizer and did not cause toxicity under these experimental conditions.
Rights: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小池 孝良

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