Annu Rev Microbiol
Graduate School of Agriculture, Osaka Metropolitan University, Osaka, Japan; email:
Published: September 2023
species complex (RSSC) strains are devastating plant pathogens distributed worldwide. The primary cell density-dependent gene expression system in RSSC strains is quorum sensing (QS). It regulates the expression of about 30% of all genes, including those related to cellular activity, primary and secondary metabolism, pathogenicity, and more. The regulatory elements encoded by the operon and gene play vital roles. RSSC strains use methyl 3-hydroxymyristate (3-OH MAME) or methyl 3-hydroxypalmitate (3-OH PAME) as the QS signal. Each type of RSSC strain has specificity in generating and receiving its QS signal, but their signaling pathways might not differ significantly. In this review, I describe the genetic and biochemical factors involved in QS signal input and the regulatory network and summarize control of the QS system, new cell-cell communications, and QS-dependent interactions with soil fungi.
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http://dx.doi.org/10.1146/annurev-micro-032521-030537 | DOI Listing |
Plant Dis
January 2025
University of Minnesota Twin Cities, Department of Plant Pathology, 1991 Upper Buford circle, 495 Borlaug Hall, Saint Paul, Minnesota, United States, 55108;
Ginger (Zingiber officinale) is an herbaceous perennial in the Zingiberaceae family grown primarily in tropical to subtropical biomes as a culinary spice, a traditional medicine, and a landscaping plant. While ginger grows at soil temperatures above 20°C, several farmers in the upper Midwestern US farmers grows short-season ginger in high tunnels. In 2023 and 2024, growers in southeastern Minnesota reported a new disease of ginger.
View Article and Find Full Text PDFPest Manag Sci
November 2024
Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China.
Plant Dis
December 2024
Department of Agriculture and Fisheries, Darwin, NT 0801, Australia.
The species complex (RSSC) causes vascular wilt of many crops and is considered one of the most destructive plant pathogenic bacteria worldwide. The species complex was recently resolved into a stable taxonomy of three species aligning with the previously determined phylotypes, namely (phylotype II), (phylotype I and III), and (phylotype IV). Knowing which species and subspecies are established in Australia is important to Australia's biosecurity and market access.
View Article and Find Full Text PDFMicrobiol Resour Announc
July 2024
Institute of Molecular Genetics, Kochi University, Nankoku, Kochi, Japan.
species complex (RSSC) shows a broad host range and is classified into four phylotypes. To compare type III effectors, we have determined the complete genome sequences of several RSSC strains, especially phylotype-I strains isolated in Japan, with different host specificity.
View Article and Find Full Text PDFMol Plant Microbe Interact
May 2024
Faculty of Agriculture and Marine Science, Kochi University, Nankoku, Kochi 783-8502, Japan.
The soil-borne phytopathogenic gram-negative bacterium species complex (RSSC) produces staphyloferrin B and micacocidin as siderophores that scavenge for trivalent iron (Fe) in the environment, depending on the intracellular divalent iron (Fe) concentration. The staphyloferrin B-deficient mutant reportedly retains its virulence, but the relationship between micacocidin and virulence remains unconfirmed. To elucidate the effect of micacocidin on RSSC virulence, we generated the micacocidin productivity-deficient mutant (Δ) that lacks , which encodes a putative polyketide synthase/non-ribosomal peptide synthetase, using the RSSC phylotype I strain OE1-1.
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