OsIAA13-mediated auxin signaling is involved in lateral root initiation in rice

Kitomi, Yuka; Inahashi, Hiroki; Takehisa, Hinako; Satō, Yutaka; Inukai, Yoshiaki

doi:10.1016/j.plantsci.2012.04.005

Cited by 108 publications

(94 citation statements)

References 53 publications

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“…However, the specific substrates of LRT2 remain unknown. We noticed that the lrt2 mutant phenotype was similar to that of the rice osiaa11, osiaa13 and osiaa23 mutants [31][32][33] ( Supplementary Fig. 1).…”

mentioning

confidence: 53%

“…The lrt2 mutant is in the Nipponbare background and has been previously described 16,49 . The cyp2-2 and osiaa11 mutants are in the Kasalath background and the osiaa13 mutant is in the Taichung 65 background 17,31,32 , which were kindly provided by Dr Xiaorong Mo, Dr Ping Wu and Dr Yoshiaki Inukai, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…1). In particular, mutations in LRT2, OsIAA11, OsIAA13 and OsIAA23 all cause defective lateral root primordia, reduced tillering and plant height, and impaired panicle development, accompanying with the reduced expression level of auxininducible genes and the altered expression pattern of the DR5:GUS reporter gene 16,17,[31][32][33] , suggesting that LRT2 may directly target OsAux/IAAs.…”

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confidence: 99%

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Peptidyl-prolyl isomerization targets rice Aux/IAAs for proteasomal degradation during auxin signalling

et al. 2015

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In plants, auxin signalling is initiated by the auxin-promoted interaction between the auxin receptor TIR1, an E3 ubiquitin ligase, and the Aux/IAA transcriptional repressors, which are subsequently degraded by the proteasome. Gain-of-function mutations in the highly conserved domain II of Aux/IAAs abolish the TIR1-Aux/IAA interaction and thus cause an auxin-resistant phenotype. Here we show that peptidyl-prolyl isomerization of rice OsIAA11 catalysed by LATERAL ROOTLESS2 (LRT2), a cyclophilin-type peptidyl-prolyl cis/trans isomerase, directly regulates the stability of OsIAA11. NMR spectroscopy reveals that LRT2 efficiently catalyses the cis/trans isomerization of OsIAA11. The lrt2 mutation reduces OsTIR1-OsIAA11 interaction and consequently causes the accumulation of a higher level of OsIAA11 protein. Moreover, knockdown of the OsIAA11 expression partially rescues the lrt2 mutant phenotype in lateral root development. Together, these results illustrate cyclophilincatalysed peptidyl-prolyl isomerization promotes Aux/IAA degradation, as a mechanism regulating auxin signalling.

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confidence: 53%

Section: Methodsmentioning

confidence: 99%

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confidence: 99%

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Peptidyl-prolyl isomerization targets rice Aux/IAAs for proteasomal degradation during auxin signalling

et al. 2015

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“…Furthermore, the expression of cell wall-remodelling enzymes in these cells was shown to be LAX3-dependent (Swarup et al, 2008). In rice, lateral root development requires the degradation of IAA11 and IAA13, two Aux/IAA proteins (Kitomi et al, 2012;Zhu et al, 2012), but changes in cortical or epidermal cells were not described to be induced by emerging lateral roots.…”

Section: Emergence Of Secondary Roots Facilitated By Local Cell Deathmentioning

confidence: 99%

Emerging Roots Alter Epidermal Cell Fate through Mechanical and Reactive Oxygen Species Signaling

Steffens¹,

et al. 2012

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A central question in biology is how spatial information is conveyed to locally establish a developmental program. Rice (Oryza sativa) can survive flash floods by the emergence of adventitious roots from the stem. Epidermal cells that overlie adventitious root primordia undergo cell death to facilitate root emergence. Root growth and epidermal cell death are both controlled by ethylene. This study aimed to identify the signal responsible for the spatial control of cell death. Epidermal cell death correlated with the proximity to root primordia in wild-type and ADVENTITIOUS ROOTLESS1 plants, indicating that the root emits a spatial signal. Ethylene-induced root growth generated a mechanical force of ;18 millinewtons within 1 h. Force application to epidermal cells above root primordia caused cell death in a dose-dependent manner and was inhibited by 1-methylcyclopropene or diphenylene iodonium, an inhibitor of NADPH oxidase. Exposure of epidermal cells not overlying a root to either force and ethylene or force and the catalase inhibitor aminotriazole induced ectopic cell death. Genetic downregulation of the reactive oxygen species (ROS) scavenger METALLOTHIONEIN2b likewise promoted force-induced ectopic cell death. Hence, reprogramming of epidermal cell fate by the volatile plant hormone ethylene requires two signals: mechanosensing for spatial resolution and ROS for cell death signaling.

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“…A number of genes involved in root development in rice have been identified by different approaches. These genes are involved in various biological processes controlling the development of primary root (Zhuang et al, 2006;Qi et al, 2012;Qin et al, 2013;Xia et al, 2014), crown root (Wang et al, 2011;Woo et al, 2007;Inukai et al, 2005), lateral root (Nakamura et al, 2006;Zhu et al, 2012;Kitomi et al, 2012), and root hair (Yuo et al, 2009;Kim et al, 2007;Won et al, 2010).…”

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confidence: 99%

A Cation-Chloride Cotransporter Gene Is Required for Cell Elongation and Osmoregulation in Rice

et al. 2016

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OsIAA13-mediated auxin signaling is involved in lateral root initiation in rice

Cited by 108 publications

References 53 publications

Peptidyl-prolyl isomerization targets rice Aux/IAAs for proteasomal degradation during auxin signalling

Peptidyl-prolyl isomerization targets rice Aux/IAAs for proteasomal degradation during auxin signalling

Emerging Roots Alter Epidermal Cell Fate through Mechanical and Reactive Oxygen Species Signaling

A Cation-Chloride Cotransporter Gene Is Required for Cell Elongation and Osmoregulation in Rice

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