title: Plant growth-promoting traits of yeasts isolated from the phyllosphere and rhizosphere of Drosera spatulata Lab.
abstract: Microorganisms can promote plant growth through direct and indirect mechanisms. Compared with the use of bacteria and mycorrhizal fungi, the use of yeasts as plant growth-promoting (PGP) agents has not been extensively investigated. In this study, yeast isolates from the phyllosphere and rhizosphere of the medicinally important plant Drosera spatulata Lab. were assessed for their PGP traits. All isolates were tested for indole-3-acetic acid-, ammonia-, and polyamine-producing abilities, calcium phosphate and zinc oxide solubilizing ability, and catalase activity. Furthermore, the activities of siderophore, 1-aminocyclopropane-1-carboxylate deaminase, and fungal cell wall-degrading enzymes were assessed. The antagonistic action of yeasts against pathogenic Glomerella cingulata was evaluated. The cocultivation of Nicotiana benthamiana with yeast isolates enhanced plant growth, indicating a potential yeast-plant interaction. Our study results highlight the potential use of yeasts as plant biofertilizers under controlled and field conditions.
authors.affiliation: Department of Biology, National Changhua University of Education, Changhua 500, Taiwan.
authors.forename: Shih-Feng
authors.initials: SF
authors.lastname: Fu
authors.affiliation: Department of Biology, National Changhua University of Education, Changhua 500, Taiwan.
authors.forename: Pei-Feng
authors.initials: PF
authors.lastname: Sun
authors.affiliation: Department of Biology, National Changhua University of Education, Changhua 500, Taiwan.
authors.forename: Hsueh-Yu
authors.initials: HY
authors.lastname: Lu
authors.affiliation: Department of Biology, National Changhua University of Education, Changhua 500, Taiwan.
authors.forename: Jyuan-Yu
authors.initials: JY
authors.lastname: Wei
authors.affiliation: Department of Biology, National Changhua University of Education, Changhua 500, Taiwan.
authors.forename: Hong-Su
authors.initials: HS
authors.lastname: Xiao
authors.affiliation: Graduate Institute of Environmental Education, National Taiwan Normal University, Taipei 116, Taiwan.
authors.forename: Wei-Ta
authors.initials: WT
authors.lastname: Fang
authors.affiliation: Graduate Institute of Environmental Resources Management, TransWorld University, Yunlin County 640, Taiwan.
authors.forename: Bai-You
authors.initials: BY
authors.lastname: Cheng
authors.affiliation: Department of Biology, National Changhua University of Education, Changhua 500, Taiwan. Electronic address: jackyjau@cc.ncue.edu.tw.
authors.forename: Jui-Yu
authors.initials: JY
authors.lastname: Chou
mesh_terms: D000935:Antifungal Agents / Q000494:pharmacology; D020231:Colletotrichum / Q000187:drug effects; D029787:Drosera / Q000382:microbiology*; D063245:Plant Development; D010937:Plant Growth Regulators / Q000378:metabolism*; D018515:Plant Leaves / Q000382:microbiology*; D058441:Rhizosphere; D012988:Soil Microbiology; D014026:Nicotiana / Q000254:growth & development / Q000382:microbiology; D015003:Yeasts / Q000302:isolation & purification / Q000502:physiology*
chemical_list: D000935:Antifungal Agents; D010937:Plant Growth Regulators
keywords: Biofertilizer; Biofungicide; Indole-3-acetic acid; Spoon-leaved sundew; Sustainable agriculture