Magnaporthe oryzae effector AvrPik-D targets a transcription factor WG7 to suppress rice immunity
Rice blast, caused by the fungal pathogen Magnaporthe oryzae , is one of the most devastating diseases for rice crops, significantly affecting crop yield and quality. During the infection process, M. oryzae secretes effector proteins that help in hijacking the host's immune responses to establi...
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Published in | Rice (New York, N.Y.) Vol. 17; no. 1; p. 14 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
13.02.2024
Springer Nature B.V SpringerOpen |
Subjects | |
Online Access | Get full text |
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Summary: | Rice blast, caused by the fungal pathogen
Magnaporthe oryzae
, is one of the most devastating diseases for rice crops, significantly affecting crop yield and quality. During the infection process,
M. oryzae
secretes effector proteins that help in hijacking the host's immune responses to establish infection. However, little is known about the interaction between the effector protein AvrPik-D and the host protein Pikh, and how AvrPik-D increases disease severity to promote infection. In this study, we show that the
M. oryzae
effector AvrPik-D interacts with the zinc finger-type transcription factor WG7 in the nucleus and promotes its transcriptional activity. Genetic removal (knockout) of the gene
WG7
in transgenic rice enhances resistance to
M. oryzae
and also results in an increased burst of reactive oxygen species after treatments with chitin. In addition, the hormone level of SA and JA, is increased and decreased respectively in
WG7
KO plants, indicating that WG7 may negatively mediate resistance through salicylic acid pathway. Conversely,
WG7
overexpression lines reduce resistance to
M. oryzae.
However, WG7 is not required for the Pikh-mediated resistance against rice blast. In conclusion, our results revealed that the
M. oryzae
effector AvrPik-D targets and promotes transcriptional activity of WG7 to suppress rice innate immunity to facilitate infection. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1939-8425 1939-8433 1934-8037 |
DOI: | 10.1186/s12284-024-00693-0 |