Open AccessPhotosynthetic bacterium R hodopseudomonas palustris GJ ‐22 induces systemic resistance against viruses
Author(s) -
Su Pin,
Tan Xinqiu,
Li Chenggang,
Zhang Deyong,
Cheng Ju'e,
Zhang Songbai,
Zhou Xuguo,
Yan Qingpin,
Peng Jing,
Zhang Zhuo,
Liu Yong,
Lu Xiangyang
Publication year - 2017
Publication title -
microbial biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.287
H-Index - 74
ISSN - 1751-7915
DOI - 10.1111/1751-7915.12704
Subject(s) - tobacco mosaic virus , rhodopseudomonas palustris , biology , bacteria , axenic , microbiology and biotechnology , blue mold , jasmonic acid , botany , virus , salicylic acid , biochemistry , virology , penicillium expansum , postharvest , genetics
Summary 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.