What does this research mean for the field?

Maintaining leaf flatness requires global coordination of growth across the mediolateral axis of the leaf blade, rather than just local synchronization between the abaxial and adaxial sides. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.CHALLENGES_CONSENSUS.

What question did this study set out to answer?

To determine how cell-level growth coordination and maturation dynamics across the leaf blade maintain organ flatness during development.

September 10, 2026PLoS BiologyOpen Access

Growth-rate coordination across the width of a leaf preserves its flatness

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Authors

KHKate Harline BLBrendan Lane MZMaura J. Zimmermann

Discussion

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Overview

Live-imaging and modeling study shows that uneven mediolateral growth drives leaf curling in Arabidopsis jaw-D mutants, indicating that global width-wise coordination preserves leaf flatness.

Key Points

To determine how cell-level growth coordination and maturation dynamics across the leaf blade maintain organ flatness during development.
Tracked cell growth dynamics and developmental maturation markers in wild-type and jaw-D mutant Arabidopsis thaliana leaves using time-lapse live imaging.
Constructed computational models to simulate how uneven growth rates perpendicular to the primary growth axis generate leaf curvature.
Maturation progression from leaf tip to base was significantly delayed in jaw-D mutants relative to wild type due to miR319-mediated repression of TCP transcription factors.
Delayed maturation disrupted growth coordination across the mediolateral axis, and computational modeling confirmed that growth disparities perpendicular to the growth axis generate mechanical buckling.

Cite This Study

Harline et al. (2026) studied this question.

synapsesocial.com/papers/6aa27ad858559d80afc73c09 https://doi.org/10.1371/journal.pbio.3003993

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September 10, 2026PLoS BiologyOpen Access

Growth-rate coordination across the width of a leaf preserves its flatness

View Full Paper

Ask AI

Bookmark

Authors

KHKate Harline BLBrendan Lane MZMaura J. Zimmermann

Discussion

Member takes

Overview

Live-imaging and modeling study shows that uneven mediolateral growth drives leaf curling in Arabidopsis jaw-D mutants, indicating that global width-wise coordination preserves leaf flatness.

Key Points

To determine how cell-level growth coordination and maturation dynamics across the leaf blade maintain organ flatness during development.
Tracked cell growth dynamics and developmental maturation markers in wild-type and jaw-D mutant Arabidopsis thaliana leaves using time-lapse live imaging.
Constructed computational models to simulate how uneven growth rates perpendicular to the primary growth axis generate leaf curvature.
Maturation progression from leaf tip to base was significantly delayed in jaw-D mutants relative to wild type due to miR319-mediated repression of TCP transcription factors.
Delayed maturation disrupted growth coordination across the mediolateral axis, and computational modeling confirmed that growth disparities perpendicular to the growth axis generate mechanical buckling.

Cite This Study

Harline et al. (2026) studied this question.

synapsesocial.com/papers/6aa27ad858559d80afc73c09 https://doi.org/10.1371/journal.pbio.3003993

View Full Paper

Ask AI

Bookmark