Molecular link between auxin and ROS-mediated polar growth

Mangano, Silvina; Denita-Juárez, Silvina P.; Choi, Hyunjung; Marzol, Eliana; Hwang, Youra; Ranocha, Philippe; Velasquez, Silvia M.; Borassi, Cecilia; Barberini, María Laura; Aptekmann, Ariel; Muschietti, Jorge; Nadra, Alejandro D.; Dunand, Christophe; Cho, Hyung-Taeg; Estevez, José M.

doi:10.1073/pnas.1701536114

Cited by 211 publications

(250 citation statements)

References 36 publications

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“…The crosstalk between auxin and ROS has mainly been reported from studies of plant growth and development (Joo et al , , ). A recent report showed that auxin‐induced ROS production was important for polar root hair growth by inducing the expression of ROS‐generating enzymes (NADPH oxidases) (Mangano et al , ). Auxin signalling could activate RSL4, which directly targets the NADPH oxidases through auxin response factors to modulate ROS levels.…”

Section: Discussionmentioning

confidence: 99%

Suppression of auxin signalling promotes rice susceptibility to Rice black streaked dwarf virus infection

Zhang

Tan

et al. 2019

Molecular Plant Pathology

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Summary Auxin plays a fundamental role in plant growth and development, and also influences plant defence against various pathogens. Previous studies have examined the different roles of the auxin pathway during infection by biotrophic bacteria and necrotrophic fungi. We now show that the auxin signalling pathway was markedly down‐regulated following infection of rice by Rice black streaked dwarf virus (RBSDV), a dsRNA virus. Repression of the auxin receptor TIR1 by a mutant overexpressing miR393 increased rice susceptibility to RBSDV. Mutants overexpressing the auxin signalling repressors OsIAA20 and OsIAA31 were also more susceptible to RBSDV. The induction of jasmonic acid (JA) pathway genes in response to RBSDV was supressed in auxin signalling mutants, suggesting that activation of the JA pathway may be part of the auxin signalling‐mediated rice defence against RBSDV. More importantly, our results also revealed that OsRboh ‐mediated reactive oxygen species levels played important roles in this defence. The results offer novel insights into the regulatory mechanisms of auxin signalling in the rice–RBSDV interaction.

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Section: Discussionmentioning

confidence: 99%

Suppression of auxin signalling promotes rice susceptibility to Rice black streaked dwarf virus infection

Zhang

Tan

et al. 2019

Molecular Plant Pathology

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“…In Figure 8, we summarize the relationship between auxin, H 2 O 2 and RCS: auxin imported into the LR founder cells enhances ROS production via RBOH (Ma et al, 2014), which is induced by activation of the transcription factor ROOT HAIR DEFECTIVE 6 LIKE 4 (RSL4) (Mangano et al, 2017). Reactive carbonyl species such as acrolein, crotonaldehyde and HNE, and non-RCS carbonyls, are then produced as a consequence of lipid peroxidation (Biswas and Mano, 2015).…”

Section: Discussionmentioning

confidence: 99%

Reactive oxygen species and reactive carbonyl species constitute a feed‐forward loop in auxin signaling for lateral root formation

et al. 2019

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Summary In auxin‐stimulated roots, production of reactive oxygen species (ROS) via the hormone‐induced activation of respiratory burst oxidase homologous NADPH oxidases facilitates lateral root (LR) formation. In this study, in order to verify that ROS can modulate auxin signaling, we examined the involvement of the lipid peroxide‐derived agents known as reactive carbonyl species (RCS) in LR formation. When auxin was added to Arabidopsis thaliana roots, the levels of RCS, for example acrolein, 4‐hydroxynonenal and crotonaldehyde, were increased prior to LR formation. Addition of the carbonyl scavenger carnosine suppressed auxin‐induced LR formation. Addition of RCS to the roots induced the expression of the auxin‐responsive DR5 promoter and the TIR1, IAA14, ARF7, LBD16 and PUCHI genes and facilitated LR formation without increasing the endogenous auxin level. DR5 and LBD16 were activated in the LR primordia. The auxin signaling‐deficient mutants arf7 arf19 and slr‐1 did not respond – and tir1 afb2 appeared to show a poor response – to RCS. When given to the roots RCS promoted the disappearance of the AXR3NT–GUS fusion protein, i.e. the degradation of the auxin/indole‐3‐acetic acid protein, as did auxin. These results indicate that the auxin‐induced production of ROS and their downstream products RCS modulate the auxin signaling pathway in a feed‐forward manner. RCS are key agents that connect the ROS signaling and the auxin signaling pathways.

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“…Indeed, auxin plays an important role in root hair development. Auxin induces RSL4 via different ARFs, including ARF5, ARF7, ARF8, and ARF19 (Mangano et al, 2017;Velasquez et al, 2016). Differences in PIN expression between trichoblast and atrichoblast cells lead to different auxin gradients between cell files and contribute to the site determination of root hair initiation (Balcerowicz et al, 2015).…”

Section: Root Hair Developmentmentioning

confidence: 99%

Tackling Plant Phosphate Starvation by the Roots

2019

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Plant responses to phosphate deprivation encompass a wide range of strategies, varying from altering root system architecture, entering symbiotic interactions to excreting root exudates for phosphorous release, and recycling of internal phosphate. These processes are tightly controlled by a complex network of proteins that are specifically upregulated upon phosphate starvation. Although the different effects of phosphate starvation have been intensely studied, the full extent of its contribution to altered root system architecture remains unclear. In this review, we focus on the effect of phosphate starvation on the developmental processes that shape the plant root system and their underlying molecular pathways.

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Molecular link between auxin and ROS-mediated polar growth

Cited by 211 publications

References 36 publications

Suppression of auxin signalling promotes rice susceptibility to Rice black streaked dwarf virus infection

Suppression of auxin signalling promotes rice susceptibility to Rice black streaked dwarf virus infection

Reactive oxygen species and reactive carbonyl species constitute a feed‐forward loop in auxin signaling for lateral root formation

Tackling Plant Phosphate Starvation by the Roots

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