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Clarification of the infection pattern of Xanthomonas citri subsp. citri on citrus fruit by artificial inoculation

文献类型： 外文期刊

作者： Liu, Lian 1 ; Liu, Xin 1 ; Liu, Lingyi 1 ; Zhu, Tao 1 ; Ye, Rongchun 1 ; Chen, Hao 1 ; Zhou, Linglei 1 ; Wu, Guang 1 ; Tan, Limei 3 ; Han, Jian 5 ; Li, Ronghua 6 ; Ma, Xianfeng 1 ; Deng, Ziniu 1 ;

作者机构： 1.Hunan Agr Univ, Coll Hort, Natl Ctr Citrus Improvement Changsha, Changsha 410128, Peoples R China

2.Minist Educ, Engn Res Ctr Hort Crop Germplasm Creat & New Varie, Changsha 410128, Peoples R China

3.Chenzhou Inst Agr Sci, Chenzhou 423000, Peoples R China

4.NanLing Inst Citrus Ind, Chenzhou 423000, Peoples R China

5.Hunan Acad Agr Sci, Hunan Hort Res Inst, Changsha 410125, Peoples R China

6.Comprehens Expt Stn Navel Sweet Orange South Hunan, Chenzhou 424200, Peoples R China

关键词： Citrus fruit; Citrus canker disease; Fruit development; Xcc infection pattern on fruit; Xcc artificial inoculation

期刊名称：PLANT METHODS （ 影响因子：5.1； 五年影响因子：6.1 ）

ISSN：

年卷期： 2024 年 20 卷 1 期

页码：

收录情况： SCI

摘要： Background Citrus canker is a significant bacterial disease caused by Xanthomonas citri subsp. citri (Xcc) that severely impedes the healthy development of the citrus industry. Especially when citrus fruit is infected by Xcc, it will reduce or even lost its commercial value. However, due to the prolonged fruiting cycle and intricate structure, much less research progress had been made in canker disease on fruit than on leaf. In fact, limited understanding has been achieved on canker development and the response to Xcc infection in fruit. Results Herein, the progression of canker disease on sweet orange fruit was tracked in the field. Results indicated that typical lesions initially appear on the sepal, style residue, nectary disk, epicarp, and peduncle of young fruits after petal fall. The susceptibility of fruits to Xcc infection diminished as the fruit developed, with no new lesions forming at the ripening stage. The establishment of an efficient method for inoculating Xcc on fruit as well as the artificial inoculation throughout the fruit's developmental cycle clarified this infection pattern. Additionally, microscopic observations during the infection process revealed that Xcc invasion caused structural changes on the surface and cross-section of the fruit. Conclusions An efficient system for inoculation on citrus fruit with Xcc was established, by which it can serve for the evaluation of citrus germplasm for canker disease resistance and systematic research on the interactions between Xcc and citrus fruits.

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