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OsmiR319-OsPCF5 modulate resistance to brown planthopper in rice through association with MYB proteins
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OsmiR319-OsPCF5 modulate resistance to brown planthopper in rice through association with MYB proteins
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OsmiR319-OsPCF5 modulate resistance to brown planthopper in rice through association with MYB proteins
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Journal Article
OsmiR319-OsPCF5 modulate resistance to brown planthopper in rice through association with MYB proteins
2024
Overview
Background
The brown planthopper (BPH) is a kind of piercing-sucking insect specific to rice, with the damage tops the list of pathogens and insects in recent years. microRNAs (miRNAs) are pivotal regulators of plant–environment interactions, while the mechanism underlying their function against insects is largely unknown.
Results
Here, we confirmed that OsmiR319, an ancient and conserved miRNA, negatively regulated resistance to BPHs, with overexpression of OsmiR319 susceptible to BPH, while suppression of OsmiR319 resistant to BPH in comparison with wild type. Meanwhile, we identified several targets of OsmiR319 that may mediate BPH resistance. Among them,
OsPCF5
was the most obviously induced by BPH feeding, and over expression of
OsPCF5
was resistance to BPH. In addition, various biochemical assays verified that OsPCF5 interacted with several MYB proteins, such as OsMYB22, OsMYB30, and OsMYB30C.Genetically, we revealed that both OsMYB22 and OsMYB30C positively regulated BPH resistance. Genetic interaction analyses confirmed that
OsMYB22
and
OsMYB30C
both function in the same genetic pathway with OsmiR319b to mediate BPH resistance.
Conclusions
Altogether, we revealed that OsPCF5 regulates BPH resistance via association with several MYB proteins downstream of OsmiR319, these MYB proteins might function as regulators of BPH resistance through regulating the phenylpropane synthesis.
