title: Photosynthetic bacterium Rhodopseudomonas palustris GJ-22 induces systemic resistance against viruses.
abstract: Photosynthetic bacteria (PSB) have been extensively used in agriculture to promote plant growth and to improve crop quality. Their potential application in plant disease management, however, is largely overlooked. In this study, the PSB strain Rhodopseudomonas palustris GJ-22 was investigated for its ability to induce resistance against a plant virus while promoting plant growth. In the field, a foliar spray of GJ-22 suspension protected tobacco plants against tobacco mosaic virus (TMV). Under axenic conditions, GJ-22 colonized the plant phyllosphere and induced resistance against TMV. Additionally, GJ-22 produced two phytohormones, indole-3-acetic acid and 5-aminolevulinic acid, which promote growth and germination in tobacco. Furthermore, GJ-22-inoculated plants elevated their immune response under subsequent TMV infection. This research may give rise to a novel biological agent with a dual function in disease management while promoting plant growth.
authors.affiliation: Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
authors.forename: Pin
authors.initials: P
authors.lastname: Su
authors.affiliation: Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
authors.forename: Xinqiu
authors.initials: X
authors.lastname: Tan
authors.affiliation: Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
authors.forename: Chenggang
authors.initials: C
authors.lastname: Li
authors.affiliation: Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
authors.forename: Deyong
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
authors.forename: Ju'e
authors.initials: J
authors.lastname: Cheng
authors.affiliation: Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
authors.forename: Songbai
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Department of Entomology, University of Kentucky, Lexington, KY, 40546, USA.
authors.forename: Xuguo
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
authors.forename: Qingpin
authors.initials: Q
authors.lastname: Yan
authors.affiliation: Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Peng
authors.affiliation: Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Liu
authors.affiliation: College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China.
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Lu
mesh_terms: D060467:Disease Resistance; D010935:Plant Diseases / Q000517:prevention & control*; D010937:Plant Growth Regulators / Q000378:metabolism; D012241:Rhodopseudomonas / Q000254:growth & development* / Q000378:metabolism; D014026:Nicotiana / Q000254:growth & development / Q000276:immunology* / Q000382:microbiology*; D017898:Tobamovirus / Q000276:immunology*; D014777:Virus Diseases / Q000517:prevention & control*
chemical_list: D010937:Plant Growth Regulators