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OsEXPA10 mediates the balance between growth and resistance to biotic stress in rice

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Abstract

Key message

OsEXPA10 gene coordinates the balance between rice development and biotic resistance.

Abstract

Expansins are proteins that can loosen the cell wall. Previous studies have indicated that expansin-encoding genes were involved in defense against abiotic stress, but little is known about the involvement of expansins in biotic stress. Brown planthopper (BPH) is one of the worst insect pests of rice in the Asia-Pacific planting area, and many efforts have been made to identify and clone BPH-resistance genes for use in breeding resistant cultivars. At the same time, rice blast caused by Magnaporthe grisea is one of the three major diseases that severely affect rice production worldwide. Here, we demonstrated that one rice expansin-encoding gene, OsEXPA10, functions in both rice growth and biotic resistance. Over expression of OsEXPA10 improved rice growth but also increased susceptibility to BPH infestation and blast attack, while knock-down OsEXPA10 gene expression resulted in reduced plant height and grain size, but also increased resistance to BPH and the blast pathogen. These results imply that OsEXPA10 mediates the balance between rice development and biotic resistance.

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Abbreviations

BPH:

Brown planthopper

OE:

Over expression

RNAi:

RNA interference

SA:

Salicylic acid

JA:

Jasmonic acid

MeJA:

Methyl jasmonic acid

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Acknowledgements

This work was supported by the National Key R&D Program of China (2016YFD0100603), the National Transgenic Great Subject from the Ministry of Agriculture of China (2016ZX08009-003-001) and the National Natural Science Foundation of China (31371949). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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Author notes

  1. Jiang Tan and Meiling Wang contributed equally to this study.

Authors and Affiliations

  1. Key Laboratory of Insect Developmental and Evolutionary Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 200032, China

    Jiang Tan, Meiling Wang, Zhenying Shi & Xuexia Miao

  2. University of the Chinese Academy of Sciences, Beijing, China

    Meiling Wang

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  1. Jiang Tan
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  2. Meiling Wang
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  3. Zhenying Shi
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  4. Xuexia Miao
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Correspondence to Xuexia Miao.

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Communicated by Da-Bing Zhang.

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Tan, J., Wang, M., Shi, Z. et al. OsEXPA10 mediates the balance between growth and resistance to biotic stress in rice. Plant Cell Rep 37, 993–1002 (2018). https://doi.org/10.1007/s00299-018-2284-7

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  • DOI: https://doi.org/10.1007/s00299-018-2284-7

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