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. 2024 May 31;195(2):1114-1116.
doi: 10.1093/plphys/kiae132.

Two auxins are better than one: BiAux joins forces with auxin to enhance lateral root formation

Héctor H Torres-Martínez  1   2
Affiliations

Two auxins are better than one: BiAux joins forces with auxin to enhance lateral root formation

Héctor H Torres-Martínez. Plant Physiol. .
No abstract available

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Conflict of interest statement

Conflict of interest statement. The author declares that there is no conflict of interest.

Figures

Figure.
Figure.
A proposed model for BiAux action mechanism in LR formation. The traditional model for auxin signal transduction explains that auxin works as a molecular glue that promotes co-receptor assembly between TIR/AFB and Aux/IAA protein family members. In this new research piece, González-García et al. (2024) described the isolation and characterization of a new metabolite, BiAux, which is accumulated when roots are grown under illumination, such as on traditional Petri dishes. It was demonstrated that BiAux binds to a specific TIR1 site close to the auxin binding site, and the binding seems to stabilize the co-receptor complex. Specifically, simultaneous treatment with auxin and BiAux enhanced the co-receptor formation between TIR1 or AFB2 and IAA18 or IAA28, auxin signal regulators for early LR formation. These complexes might release the positive auxin signal regulator ARF7, which was found to mediate the BiAux response during the lateral formation process. Figure was created with BioRender.com by H.H.T.M.
See this image and copyright information in PMC

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