What question did this study set out to answer?

This research aims to investigate how three-dimensional genome architecture affects gene expression in legume-rhizobium symbiosis, particularly focusing on NODULE INCEPTION activation.

July 4, 2026Plant CommunicationsOpen Access

Three-dimensional genome reorganization enables cytokinin activation of NODULE INCEPTION during symbiotic nodulation

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This research aims to investigate how three-dimensional genome architecture affects gene expression in legume-rhizobium symbiosis, particularly focusing on NODULE INCEPTION activation.
Utilized High-throughput Chromosome Conformation Capture (Hi-C) to examine chromatin landscape.
Compared 3D genome architecture between nitrogen-fixing symbiotic nodules and non-symbiotic roots.
Identified enhancer-promoter interactions linked to cytokinin signaling and NIN gene regulation.
Revealed significant changes in 3D chromatin architecture during nodulation compared to non-symbiotic conditions.
Identified a long-range chromatin loop linking a distal enhancer with the NIN promoter, essential for its activation.
Demonstrated that the cytokinin signaling transcription factor RRB3 binds to the distal enhancer, facilitating enhancer-promoter looping.

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Implication

Randomized trial demonstrates 3D chromatin landscape's role in NIN activation during legume-rhizobium symbiosis, indicating novel regulatory mechanisms.

Cite This Study

Fonouni-Farde et al. (2026) studied this question.

synapsesocial.com/papers/6a48a30989561a0c2d78d4bf https://doi.org/10.1016/j.xplc.2026.101986

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Implication

Randomized trial demonstrates 3D chromatin landscape's role in NIN activation during legume-rhizobium symbiosis, indicating novel regulatory mechanisms.

Three-dimensional genome reorganization enables cytokinin activation of NODULE INCEPTION during symbiotic nodulation

Key Points

Discussion

Implication

Cite This Study

Three-dimensional genome reorganization enables cytokinin activation of NODULE INCEPTION during symbiotic nodulation

Key Points

Discussion

Implication

Cite This Study

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