Abstract
Abstract DELLA proteins, negative regulators of the gibberellin (GA) pathway, play important roles in plant growth, development and pathogen resistance by regulating multiple phytohormone signals. Yet, whether and how they regulate plant herbivore resistance remain unknown. We found that the expression of the rice DELLA gene OsSLR1 was down‐regulated by an infestation of female adults of the brown planthopper (BPH) Nilaparvata lugens . On one hand, OsSLR1 positively regulated BPH‐induced levels of two mitogen‐activated protein kinase and four WRKY transcripts, and of jasmonic acid, ethylene and H 2 O 2 . On the other hand, silencing OsSLR1 enhanced constitutive levels of defence‐related compounds, phenolic acids, lignin and cellulose, as well as the resistance of rice to BPH in the laboratory and in the field. The increased resistance in rice with silencing of OsSLR1 is probably due to impaired JA and ethylene pathways, and, at least in part, to the increased lignin level and mechanical hardness of rice leaf sheaths. Our findings illustrate that OsSLR1, acting as an early negative regulator, plays an important role in regulating the resistance of rice to BPH by activating appropriate defence‐related signalling pathways and compounds. Moreover, our data also provide new insights into relationships between plant growth and defence.
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Claims 6
Claim · model-written summary
Brown planthopper infestation down-regulated rice OsSLR1 expression.
- Taxon
- rice
Oryza sativae0 - Treatment
- an infestation of female adults of the brown planthopper (BPH) Nilaparvata lugense0
- Interactor
- Nilaparvata lugens
Nilaparvata lugense0pest - Gene
- OsSLR1e0
- Outcome
- expression of the rice DELLA gene OsSLR1e0
- Direction
- down‐regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the expression of the rice DELLA gene OsSLR1 was down‐regulated by an infestation of female adults of the brown planthopper (BPH) Nilaparvata lugens”
Claim · model-written summary
OsSLR1 positively regulated brown planthopper-induced kinase and WRKY transcripts.
- Taxon
- riceOryza sativat0
- Interactor
- BPHe0pest
- Gene
- OsSLR1e0
- Outcome
- levels of two mitogen‐activated protein kinase and four WRKY transcriptse0
- Direction
- positively regulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“OsSLR1 positively regulated BPH‐induced levels of two mitogen‐activated protein kinase and four WRKY transcripts”
t0“rice”
Claim · model-written summary
OsSLR1 positively regulated brown planthopper-induced jasmonic acid, ethylene and H 2 O 2 levels.
- Taxon
- riceOryza sativat0
- Interactor
- BPHe0pest
- Gene
- OsSLR1e0
- Outcome
- jasmonic acid, ethylene and H 2 O 2e0
- Direction
- positively regulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“OsSLR1 positively regulated BPH‐induced levels of two mitogen‐activated protein kinase and four WRKY transcripts, and of jasmonic acid, ethylene and H 2 O 2”
t0“rice”
Claim · model-written summary
Silencing OsSLR1 increased constitutive phenolic acids, lignin and cellulose.
- Taxon
- riceOryza sativat0
- Treatment
- silencing OsSLR1e0
- Gene
- OsSLR1e0
- Outcome
- constitutive levels of defence‐related compounds, phenolic acids, lignin and cellulosee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silencing OsSLR1 enhanced constitutive levels of defence‐related compounds, phenolic acids, lignin and cellulose”
t0“rice”
Claim · model-written summary
Silencing OsSLR1 enhanced rice resistance to brown planthopper in the laboratory and field.
- Taxon
- riceOryza sativae0
- Treatment
- silencing OsSLR1e0
- Interactor
- BPHe0pest
- Gene
- OsSLR1e0
- Outcome
- resistance of rice to BPHe0
- Direction
- enhancede0
- Setting
- laboratory and in the fielde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silencing OsSLR1 enhanced constitutive levels of defence‐related compounds, phenolic acids, lignin and cellulose, as well as the resistance of rice to BPH in the laboratory and in the field”
Claim · model-written summary
Authors attribute increased rice resistance partly to impaired JA and ethylene pathways and increased leaf sheath lignin and hardness.
- Taxon
- riceOryza sativae0
- Organ / stage
- rice leaf sheathse0
- Treatment
- silencing of OsSLR1e0
- Gene
- OsSLR1e0
- Outcome
- increased resistance in ricee0
- Qualifier
- probably due to impaired JA and ethylene pathways, and, at least in part, to the increased lignin level and mechanical hardness of rice leaf sheathse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increased resistance in rice with silencing of OsSLR1 is probably due to impaired JA and ethylene pathways, and, at least in part, to the increased lignin level and mechanical hardness of rice leaf sheaths”
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