| Title: | Biological and molecular characterization of linalool-mediated field resistance against Xanthomonas citri subsp. citri in citrus trees |
| Author(s): | Shimada T; Endo T; Fujii H; Rodriguez A; Yoshioka T; Pena L; Omura M; |
| Address: | "Department of Citriculture, Institute of Fruit Tree and Tea Science (NIFTS), National Agriculture and Bio-oriented Research Organization (NARO), Okitsu nakachou 485-6, Shimizu-ku, Shizuoka 424-0292, Japan. Fundecitrus, Av. Dr. Adhemar de Barros Pereira, 201.14807-040 Vila Melhado, Araraquara, Sao Paulo, Brazil. Department of Biotechnology and Plant Improvement of Cultivated Species, Instituto de Biologia Molecular y Celular de Plantas (IBMCP/CSIC-UPV), Ingeniero Fausto Elio, Valencia 46022, Spain. Faculty of Agriculture, Shizuoka University, Ohya 836, Suruga-ku, Shizuoka 422-8529, Japan" |
| ISSN/ISBN: | 1758-4469 (Electronic) 0829-318X (Linking) |
| Abstract: | "The biological and molecular traits of the Ponkan mandarin (Citrus reticulata Blanco) were characterized in an investigation of the mechanisms of field resistance against citrus canker disease caused by the bacterial pathogen, Xanthomonas citri subsp. citri (Xcc). Various conventional citrus varieties that show diverse responses to Xcc were investigated, and the temporal changes in Xcc titer in response to linalool concentrations among the varieties revealed differences in Xcc proliferation trends in the inoculated leaves of the immune, field-resistant and susceptible varieties. In addition, increased linalool accumulation was inversely related to Xcc titers in the field-resistant varieties, which is likely caused by host--pathogen interactions. Quantitative trait locus (QTL) analysis using the F1 population of the resistant Ponkan mandarin and susceptible 'Harehime' ('E-647' x 'Miyagawa-wase') cultivar revealed that linalool accumulation and Xcc susceptibility QTLs overlapped. These results provide novel insights into the molecular mechanisms of linalool-mediated field resistance to Xcc, and suggest that high linalool concentrations in leaves has an antibacterial effect and becomes a candidate-biomarker target for citrus breeding to produce seedlings with linalool-mediated field resistance against Xcc" |
| Keywords: | Acyclic Monoterpenes *Citrus/genetics/microbiology Plant Diseases/microbiology Trees Xanthomonas candidate biomarker canker citrus field resistance linalool systemic acquired resistance volatile organic compounds; |
| Notes: | "MedlineShimada, Takehiko Endo, Tomoko Fujii, Hiroshi Rodriguez, Ana Yoshioka, Terutaka Pena, Leandro Omura, Mitsuo eng Research Support, Non-U.S. Gov't Canada 2021/05/08 Tree Physiol. 2021 Nov 8; 41(11):2171-2188. doi: 10.1093/treephys/tpab063" |
