title: Weeding volatiles reduce leaf and seed damage to field-grown soybeans and increase seed isoflavones.
abstract: Field experiments were conducted over 3 years (2012, 2013, and 2015), in which half of the young stage soybean plants were exposed to volatiles from cut goldenrods three times over 2-3 weeks, while the other half remained unexposed. There was a significant reduction in the level of the total leaf damage on exposed soybean plants compared with unexposed ones. In 2015, the proportion of damage to plants by Spodoptera litura larvae, a dominant herbivore, was significantly less in the exposed field plots than in the unexposed plots. Under laboratory conditions, cut goldenrod volatiles induced the direct defenses of soybean plants against S. litura larvae and at least three major compounds, α-pinene, β-myrcene, and limonene, of cut goldenrod volatiles were involved in the induction. The number of undamaged seeds from the exposed plants was significantly higher than that from unexposed ones. Concentrations of isoflavones in the seeds were significantly higher in seeds from the exposed plants than in those from the unexposed plants. Future research evaluating the utility of weeding volatiles, as a form of plant-plant communications, in pest management programs is necessary.
authors.affiliation: Center for Ecological Research, Kyoto University, 2-509-3 Hirano, Otsu, Shiga 520-2113, Japan.|The Hakubi Center for Advanced Research, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
authors.forename: Kaori
authors.initials: K
authors.lastname: Shiojiri
authors.affiliation: Center for Ecological Research, Kyoto University, 2-509-3 Hirano, Otsu, Shiga 520-2113, Japan.
authors.forename: Rika
authors.initials: R
authors.lastname: Ozawa
authors.affiliation: Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries, Agricultural Technology Institute, Kasai 679-0198, Japan.
authors.forename: Ken-Ichi
authors.initials: KI
authors.lastname: Yamashita
authors.affiliation: Department Agrobiological Resources, Faculty of Agriculture, Meijo University, Nagoya, Aichi 468-8502, Japan.
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Uefune
authors.affiliation: Graduate School of Sciences and Technology for Innovation (Faculty of Agriculture), Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Matsui
authors.affiliation: Graduate School of Agriculture, Iwate University, Ueda, Morioka 020-8550, Japan.
authors.forename: Chigen
authors.initials: C
authors.lastname: Tsukamoto
authors.affiliation: Kyoto Prefectural Agriculture, Forestry and Fisheries Technology Center, Kameoka, Kyoto 621-0806, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Tokumaru
authors.affiliation: Center for Ecological Research, Kyoto University, 2-509-3 Hirano, Otsu, Shiga 520-2113, Japan.
authors.forename: Junji
authors.initials: J
authors.lastname: Takabayashi
mesh_terms: D060434:Herbivory; D007529:Isoflavones / Q000378:metabolism*; D018515:Plant Leaves / Q000187:drug effects*; D057685:Plant Weeds / Q000737:chemistry; D012639:Seeds / Q000187:drug effects* / Q000378:metabolism*; D013025:Glycine max / Q000187:drug effects* / Q000502:physiology*; D055549:Volatile Organic Compounds / Q000009:adverse effects*
chemical_list: D007529:Isoflavones; D055549:Volatile Organic Compounds