What question did this study set out to answer?

To investigate the downstream signaling mechanisms controlled by MPK3 and MPK6 during plant effector-triggered immunity, focusing on their modulation of photosynthesis and chloroplastic reactive oxygen species.

May 3, 2018PLoS BiologyOpen Access

Active photosynthetic inhibition mediated by MPK3/MPK6 is critical to effector-triggered immunity

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Authors

JSJianbin SuShandong Normal University LYLiuyi YangZhejiang University of Finance and Economics QZQiankun ZhuSouthwest Jiaotong University

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Implication

Molecular study reveals that MPK3/MPK6-driven photosynthetic inhibition triggers chloroplastic ROS accumulation in Arabidopsis, indicating a crucial role in effector-triggered immunity.

Key Points

To investigate the downstream signaling mechanisms controlled by MPK3 and MPK6 during plant effector-triggered immunity, focusing on their modulation of photosynthesis and chloroplastic reactive oxygen species.
Assessed immune activation mediated by both CNL and TNL resistance proteins in Arabidopsis thaliana models.
Employed chemical-genetically rescued mpk3 mpk6 double-mutant plants to determine the necessity of MPK3 and MPK6 in photosynthetic suppression and pathogen resistance.
Engineered transgenic plants expressing a plastid-targeted cyanobacterial flavodoxin (pFLD) to test how protecting chloroplasts impacts photosynthetic inhibition and hypersensitive response cell death.
Prolonged activation of MPK3 and MPK6 altered the expression of photosynthesis-related genes and inhibited photosynthesis, leading to light-dependent chloroplastic accumulation of superoxide and hydrogen peroxide.
Chemical-genetically rescued mpk3 mpk6 double mutants exhibited compromised photosynthetic inhibition, impaired chloroplastic ROS accumulation, delayed hypersensitive response cell death, and decreased pathogen resistance.
Expression of plastid-targeted cyanobacterial flavodoxin preserved chloroplast function, delayed photosynthetic inhibition, and compromised effector-triggered immunity.

Cite This Study

Su et al. (2018) studied this question.

synapsesocial.com/papers/6a85a320a46f793aa75e35c6 https://doi.org/10.1371/journal.pbio.2004122

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Implication

Molecular study reveals that MPK3/MPK6-driven photosynthetic inhibition triggers chloroplastic ROS accumulation in Arabidopsis, indicating a crucial role in effector-triggered immunity.

Active photosynthetic inhibition mediated by MPK3/MPK6 is critical to effector-triggered immunity

Discussion

Member takes

Implication

Key Points

Cite This Study

Active photosynthetic inhibition mediated by MPK3/MPK6 is critical to effector-triggered immunity

Discussion

Member takes

Implication

Key Points

Cite This Study

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