Fine-Tuning Roles of Osa-miR159a in Rice Immunity Against Magnaporthe oryzae and Development.
Magnaporthe oryzae
Osa-miR159a
Rice blast disease
Short tandem target mimic
microRNA
Journal
Rice (New York, N.Y.)
ISSN: 1939-8425
Titre abrégé: Rice (N Y)
Pays: United States
ID NLM: 101503136
Informations de publication
Date de publication:
06 Mar 2021
06 Mar 2021
Historique:
received:
27
08
2020
accepted:
24
02
2021
entrez:
7
3
2021
pubmed:
8
3
2021
medline:
8
3
2021
Statut:
epublish
Résumé
Rice blast caused by Magnaporthe oryzae is one of the most destructive diseases of rice. An increasing number of microRNAs (miRNAs) have been reported to fine-tune rice immunity against M. oryzae and coordinate with growth and development. Here, we showed that rice microRNA159a (Osa-miR159a) played a positive role in rice resistance to M. oryzae. The expression of Osa-miR159a was suppressed in a susceptible accession at 12, 24, and 48 h post-inoculation (hpi); it was upregulated in a resistant accession of M. oryzae at 24 hpi. The transgenic rice lines overexpressing Osa-miR159a were highly resistant to M. oryzae. In contrast, the transgenic lines expressing a short tandem target mimic (STTM) to block Osa-miR159a showed enhanced susceptibility. Knockout mutations of the target genes of Osa-miR159a, including OsGAMYB, OsGAMYBL, and OsZF, led to resistance to M. oryzae. Alteration of the expression of Osa-miR159a impacted yield traits including pollen and grain development. Our results indicated that Osa-miR159a positively regulated rice immunity against M. oryzae by downregulating its target genes. Proper expression of Osa-miR159a was critical for coordinating rice blast resistance with grain development.
Sections du résumé
BACKGROUND
BACKGROUND
Rice blast caused by Magnaporthe oryzae is one of the most destructive diseases of rice. An increasing number of microRNAs (miRNAs) have been reported to fine-tune rice immunity against M. oryzae and coordinate with growth and development.
RESULTS
RESULTS
Here, we showed that rice microRNA159a (Osa-miR159a) played a positive role in rice resistance to M. oryzae. The expression of Osa-miR159a was suppressed in a susceptible accession at 12, 24, and 48 h post-inoculation (hpi); it was upregulated in a resistant accession of M. oryzae at 24 hpi. The transgenic rice lines overexpressing Osa-miR159a were highly resistant to M. oryzae. In contrast, the transgenic lines expressing a short tandem target mimic (STTM) to block Osa-miR159a showed enhanced susceptibility. Knockout mutations of the target genes of Osa-miR159a, including OsGAMYB, OsGAMYBL, and OsZF, led to resistance to M. oryzae. Alteration of the expression of Osa-miR159a impacted yield traits including pollen and grain development.
CONCLUSIONS
CONCLUSIONS
Our results indicated that Osa-miR159a positively regulated rice immunity against M. oryzae by downregulating its target genes. Proper expression of Osa-miR159a was critical for coordinating rice blast resistance with grain development.
Identifiants
pubmed: 33677712
doi: 10.1186/s12284-021-00469-w
pii: 10.1186/s12284-021-00469-w
pmc: PMC7937009
doi:
Types de publication
Journal Article
Langues
eng
Pagination
26Subventions
Organisme : National Natural Science Foundation of China
ID : U19A2033, 31672090 and 31430072
Organisme : Sichuan Applied Fundamental Research Foundation
ID : 2020YJ0332
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