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Selection of tolerant Eucalyptus genotypes to Botryosphaeriaceae species in southern China

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Abstract

Diseases associated with Botryosphaeriaceae are widespread in Eucalyptus plantations in southern China. A high species diversity of Botryosphaeriaceae exists in these plantations, including species in the genera Botryosphaeria, Cophinforma, Lasiodiplodia, and Neofusicoccum. Botryosphaeriaceae fungi isolated from Eucalyptus and adjacent plants can be pathogenic to Eucalyptus trees. However, few field studies have assessed the tolerance of Eucalyptus genotypes to Botryosphaeriaceae. Twenty-two isolates representing 14 Botryosphaeriaceae species identified from Eucalyptus and adjacent plants were inoculated on the seedlings of a widely planted Eucalyptus genotype in a greenhouse. The greenhouse inoculation results showed that most isolates of Lasiodiplodia species were more pathogenic than the isolates of Botryosphaeria, Cophinforma, and Neofusicoccum species. Based on the greenhouse inoculation results, five highly pathogenic isolates, including one isolate of L. hormozganensis, two isolates of L. pseudotheobromae, and two isolates of L. theobromae were inoculated on trees of 20 Eucalyptus genotypes in the field to evaluate the tolerance of these genotypes. The resistance of the 20 Eucalyptus genotypes to each of the five Lasiodiplodia isolates was variable. The average lesion lengths produced by the five Lasiodiplodia isolates on each of the 20 Eucalyptus genotypes indicated that there were significant differences in tolerance among the Eucalyptus genotypes. This study evaluated the tolerance levels of 20 Eucalyptus genotypes, that are widely planted in southern China, to highly pathogenic Botryosphaeriaceae species.

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Data used in this manuscript will be available from the corresponding author with reasonable request.

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Acknowledgements

We thank Ms. Wen Wang and Mr. QuanChao Wang for their assistance in conducting pathogenicity tests. We thank LetPub (www.letpub.com) for its linguistic assistance during the preparation of this manuscript.

Funding

This study was initiated through the bilateral agreement between the governments of South Africa and China and supported by The National Key R&D Program of China (China-South Africa Forestry Joint Research Centre Project; project No. 2018YFE0120900), the National Ten-thousand Talents Program (Project No. W03070115), and the GuangDong Top Young Talents Program (Project No. 20171172).

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Authors and Affiliations

  1. China Eucalypt Research Centre (CERC), Chinese Academy of Forestry (CAF), 524022, ZhanJiang, GuangDong Province, China

    GuoQing Li & ShuaiFei Chen

  2. China Forestry Group Leizhou Forestry Bureau Co., Ltd., 524000, ZhanJiang, GuangDong Province, China

    WenPing Chen & Fan Jie

Authors
  1. GuoQing Li
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  2. WenPing Chen
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  3. Fan Jie
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  4. ShuaiFei Chen
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Contributions

G.Q. Li conducted the experiments, analyzed the data and wrote the first draft of the manuscript, S.F. Chen designed the research and revised the manuscript. W.P. Chen and F. Jie supplied the Eucalyptus plantations and conducted the experiment with G. Q. Li.

Corresponding author

Correspondence to ShuaiFei Chen.

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This study does not contain studies with human participants or animals performed by the author.

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All owners of the Eucalyptus trees used in the field experiments have agreed to publishing the data collected from the field.

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All authors fully agreed to the publication of the manuscript.

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The authors have no conflicts of interest to declare that are relevant to the content of this article.

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Li, G., Chen, W., Jie, F. et al. Selection of tolerant Eucalyptus genotypes to Botryosphaeriaceae species in southern China. J Plant Pathol 104, 527–535 (2022). https://doi.org/10.1007/s42161-022-01109-y

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  • DOI: https://doi.org/10.1007/s42161-022-01109-y

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