Biological and molecular characterization of linalool-mediated field resistance against Xanthomonas citri subsp. citri in citrus trees.
Biological and molecular characterization of linalool-mediated field resistance against Xanthomonas citri subsp. citri in citrus trees.
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DOI：
10.1093/treephys/tpab063
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发表时间：
2021-05
期刊：
影响因子：
4
通讯作者：
T. Shimada;T. Endo;H. Fujii;Ana Rodríguez;T. Yoshioka;L. Peña;M. Omura
中科院分区：
文献类型：
--
作者：
T. Shimada;T. Endo;H. Fujii;Ana Rodríguez;T. Yoshioka;L. Peña;M. Omura
为探讨柑桔溃疡病的田间抗性机制，对芦柑（Citrus reticulata布兰科）的生物学和分子生物学特性进行了研究。柑橘属（Xcc）.各种传统的柑橘品种，表现出不同的反应XCC进行了调查，并在XCC滴度响应芳樟醇浓度的品种之间的时间变化揭示了XCC增殖趋势的差异，在接种叶片的免疫，田间抗性，和易感品种。此外，芳樟醇积累增加呈负相关的XCC滴度在田间抗性品种，这可能是由主机-病原体相互作用。利用抗病品种‘E-647’与感病品种‘宫川was’的F1群体进行QTL分析，发现芳樟醇积累与Xcc感病QTL重叠。这些结果提供了新的见解芳樟醇介导的田间抗Xcc的分子机制，并表明，在叶片中的芳樟醇高浓度具有抗菌作用，并成为柑橘育种产生幼苗芳樟醇介导的田间抗Xcc的候选生物标志物的目标。
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' × '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 become a candidate-biomarker target for citrus breeding to produce seedlings with linalool-mediated field resistance against Xcc.