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
Hunan Academy of Agricultural Sciences, Hunan Plant Protection Institute, Changsha, 410125, China.
Department of Entomology, University of Kentucky, Lexington, KY, 40546, USA.
Microb Biotechnol. 2017 May;10(3):612-624. doi: 10.1111/1751-7915.12704. Epub 2017 Mar 14.
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.
光合细菌（PSB）已在农业中广泛用于促进植物生长和提高作物品质。然而，它们在植物病害管理中的潜在应用在很大程度上被忽视了。在本研究中，对光合细菌菌株沼泽红假单胞菌GJ - 22在促进植物生长的同时诱导对植物病毒抗性的能力进行了研究。在田间，叶面喷施GJ - 22悬浮液可保护烟草植株免受烟草花叶病毒（TMV）侵害。在无菌条件下，GJ - 22定殖于植物叶际并诱导对TMV的抗性。此外，GJ - 22产生两种植物激素，吲哚 - 3 - 乙酸和5 - 氨基乙酰丙酸，它们促进烟草的生长和发芽。此外，接种GJ - 22的植物在随后的TMV感染下提高了免疫反应。这项研究可能会产生一种在病害管理中具有双重功能同时促进植物生长的新型生物制剂。
