Iron Excess Stress Promotes Adventitious Root Formation at the Root–Hypocotyl Junction in Arabidopsis

Q: What does this research mean for the field?

Iron excess triggers auxin-mediated adventitious root formation at the root-hypocotyl junction in Arabidopsis, enabling the plant to maintain root growth when primary root function is compromised by iron toxicity. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Poonam Kanwar; Britta Möllmann; Stan Altmeisch; Petra Bauer

doi:10.1111/pce.70860

September 8, 2026Plant Cell & EnvironmentOpen Access

Iron Excess Stress Promotes Adventitious Root Formation at the Root–Hypocotyl Junction in Arabidopsis

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Key Points

Determine how Arabidopsis maintains root system development when primary root function is impaired by toxic levels of iron.
Exposed Arabidopsis seedlings to excess iron conditions to evaluate root developmental plasticity.
Assessed adventitious root emergence at the root–hypocotyl junction (J-ARs) and monitored auxin pathway involvement.
Iron excess triggers the formation of adventitious roots specifically at the root–hypocotyl junction (J-ARs).
J-AR induction is mediated by the phytohormone auxin to sustain overall root growth when primary root elongation is halted by iron toxicity.

Implication

Experimental study reveals iron excess stimulates auxin-mediated adventitious root formation in Arabidopsis, highlighting an adaptive rescue mechanism against metal toxicity.

Abstract

Summary statement Fe excess triggers auxin‐mediated adventitious root formation at the root–hypocotyl junction (J‐ARs), helping Arabidopsis maintain root growth when primary root function is compromised under Fe toxicity.

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Cite This Study

Kanwar et al. (2026) studied this question.

synapsesocial.com/papers/6aa27b9a58559d80afc74de0 https://doi.org/10.1111/pce.70860

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Iron Excess Stress Promotes Adventitious Root Formation at the Root–Hypocotyl Junction in Arabidopsis

Key Points

Implication

Abstract

Discussion

Cite This Study

Iron Excess Stress Promotes Adventitious Root Formation at the Root–Hypocotyl Junction in Arabidopsis

Key Points

Implication

Abstract

Discussion

Cite This Study

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