What does this research mean for the field?

CIPK11 functions as a negative regulator of plant adaptation to nitrate availability by modulating nitrate acquisition and assimilation, partially through the regulation of plasma membrane H+-ATPase activity. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To determine the functional role of the protein kinase CIPK11 (PKS5) in mediating plant adaptation to fluctuating nitrate availability.

September 8, 2026PlantsOpen Access

CIPK11 Regulates Plant Adaptation to Nitrate Availability in Arabidopsis

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Authors

HWHaijing WangSinopec (China)TLTongtong LiuSecond Military Medical University HXHongzhi Xu

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Implication

Genetic analysis reveals that CIPK11 negatively regulates nitrate acquisition and assimilation in Arabidopsis, highlighting its role as a molecular brake on plant nitrogen responses.

Key Points

To determine the functional role of the protein kinase CIPK11 (PKS5) in mediating plant adaptation to fluctuating nitrate availability.
Examined Arabidopsis loss-of-function (pks5-1) and gain-of-function (pks5-3, pks5-4) mutants under nitrate deficiency and nitrate resupply conditions.
Measured growth phenotypes, nitrate and total protein accumulation, and expression of nitrate-responsive genes (NRT2.1, NRT2.4, NIA1, and NIA2).
Assessed extracellular H+ flux and response to the plasma membrane H+-ATPase inhibitor protonstatin-1 (PS-1).
CIPK11 expression was suppressed under nitrate starvation and rapidly induced following nitrate resupply.
The loss-of-function mutant pks5-1 exhibited enhanced growth, elevated nitrate and protein accumulation, and increased expression of nitrate-responsive genes, whereas gain-of-function mutants showed opposite effects.
Altered extracellular H+ dynamics and sensitivity to protonstatin-1 indicated that CIPK11-mediated nitrate repression operates partly through plasma membrane H+-ATPase inhibition.

Cite This Study

Wang et al. (2026) studied this question.

synapsesocial.com/papers/6a9fd7ab58e84d0ff5b46824 https://doi.org/10.3390/plants15172723

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Implication

Genetic analysis reveals that CIPK11 negatively regulates nitrate acquisition and assimilation in Arabidopsis, highlighting its role as a molecular brake on plant nitrogen responses.

CIPK11 Regulates Plant Adaptation to Nitrate Availability in Arabidopsis

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Key Points

Cite This Study

CIPK11 Regulates Plant Adaptation to Nitrate Availability in Arabidopsis

Discussion

Member takes

Implication

Key Points

Cite This Study

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