Characterization of a &amp;lt;i&amp;gt;Tos&amp;lt;/i&amp;gt;17 Insertion Mutant of Rice Auxin Signal Transcription Factor Gene, &amp;lt;i&amp;gt;OsARF&amp;lt;/i&amp;gt;24

Sakamoto, Tomoaki; Inukai, Yoshiaki

doi:10.4236/ajps.2013.41013

Cited by 7 publications

(3 citation statements)

References 25 publications

(47 reference statements)

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“…d). Little information is available to distinguish between these alternatives, as the full catalogue of potential in planta ARF dimers/oligomers is not available, but the co‐expression of activator and repressor ARFs in the same tissue (Vernoux et al ) is probably functionally relevant for auxin‐dependent transcription, and in rice, the induced truncation of a repressor ARF showed that at least part of domain IV (PB1) was required for full repressor activity (Sakamoto & Inukai ).…”

Section: Auxin Response Factors Are Both Transcriptional Activators Amentioning

confidence: 99%

Auxin response factors

Chandler

2016

Plant Cell & Environment

238

188

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Auxin signalling involves the activation or repression of gene expression by a class of auxin response factor (ARF) proteins that bind to auxin response elements in auxin-responsive gene promoters. The release of ARF repression in the presence of auxin by the degradation of their cognate auxin/indole-3-acetic acid repressors forms a paradigm of transcriptional response to auxin. However, this mechanism only applies to activating ARFs, and further layers of complexity of ARF function and regulation are being revealed, which partly reflect their highly modular domain structure. This review summarizes our knowledge concerning ARF binding site specificity, homodimer and heterodimer multimeric ARF association and cooperative function and how activator ARFs activate target genes via chromatin remodelling and evolutionary information derived from phylogenetic comparisons from ARFs from diverse species. ARFs are regulated in diverse ways, and their importance in non-auxin-regulated pathways is becoming evident. They are also embedded within higher-order transcription factor complexes that integrate signalling pathways from other hormones and in response to the environment. The ways in which new information concerning ARFs on many levels is causing a revision of existing paradigms of auxin response are discussed.

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Section: Auxin Response Factors Are Both Transcriptional Activators Amentioning

confidence: 99%

Auxin response factors

Chandler

2016

Plant Cell & Environment

238

188

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“…Among the TaARF members, TaARF9 and 13 in Group IV and TaARF15 in Group VI both significantly responded to exogenous auxin. Since other ARF s in the same group, including AtARF2 , SlARF2 , OsARF1 , and OsARF24 in Group IV as well as AtARF7 , AtARF19 , OsARF19 , SlARF19 , and OsARF5 in Group VI, were confirmed to be involved in the regulatory development of plant roots, stems, and leaves ( Ellis et al, 2005 ; Inukai et al, 2005 ; Sakamoto and Inukai, 2013 ; Galvan-Ampudia and Vernoux, 2014 ; Ma et al, 2015 ; Zhang et al, 2015 ; Indoliya et al, 2016 ; Ren et al, 2017 ), it is speculated that TaARF9 , 13 , and 15 also have similar functions. In addition, the in silico expression data revealed that in Group IV, TaARF9 showed a high expression level in roots and TaARF12 as well as TaARF13 were highly expressed during seedlings, vegetative and reproductive stages in wheat.…”

Section: Discussionmentioning

confidence: 98%

Characterization and Expression Patterns of Auxin Response Factors in Wheat

Qiao

Zhang

et al. 2018

Front. Plant Sci.

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Auxin response factors (ARFs) are important transcription factors involved in both the auxin signaling pathway and the regulatory development of various plant organs. In this study, 23 TaARF members encoded by a total of 68 homeoalleles were isolated from 18 wheat chromosomes (excluding chromosome 4). The TaARFs, including their conserved domains, exon/intron structures, related microRNAs, and alternative splicing (AS) variants, were then characterized. Phylogenetic analysis revealed that members of the TaARF family share close homology with ARFs in other grass species. qRT-PCR analyses revealed that 20 TaARF members were expressed in different organs and tissues and that the expression of some members significantly differed in the roots, stems, and leaves of wheat seedlings in response to exogenous auxin treatment. Moreover, protein network analyses and co-expression results showed that TaTIR1–TaARF15/18/19–TaIAA13 may interact at both the protein and genetic levels. The results of subsequent evolutionary analyses showed that three transcripts of TaARF15 in the A subgenome of wheat exhibited high evolutionary rate and underwent positive selection. Transgenic analyses indicated that TaARF15-A.1 promoted the growth of roots and leaves of Arabidopsis thaliana and was upregulated in the overexpression plants after auxin treatment. Our results will provide reference information for subsequent research and utilization of the TaARF gene family.

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“…Several genes that regulate plant architecture and organ size in relation to hormone pathways have been identified and characterized in rice. For instance, the narrow leaf mutant nal7 [17], osarf24 [68], and tryptophan-deficient dwarf mutant tdd1 [39], which are all related to the auxin pathway. The dwarf mutants gid1 [69], gid2 [70], slr1 [71], d18 [72], and sd1 [73], and the small seeds mutants oscbl5 [32] and sgsd3 [74], are related to the gibberellin pathway.…”

Section: Discussionmentioning

confidence: 99%

SMALL PLANT AND ORGAN 1 (SPO1) Encoding a Cellulose Synthase-like Protein D4 (OsCSLD4) Is an Important Regulator for Plant Architecture and Organ Size in Rice

Qiao,

Wu,

Yuan

et al. 2023

IJMS

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Plant architecture and organ size are considered as important traits in crop breeding and germplasm improvement. Although several factors affecting plant architecture and organ size have been identified in rice, the genetic and regulatory mechanisms remain to be elucidated. Here, we identified and characterized the small plant and organ 1 (spo1) mutant in rice (Oryza sativa), which exhibits narrow and rolled leaf, reductions in plant height, root length, and grain width, and other morphological defects. Map-based cloning revealed that SPO1 is allelic with OsCSLD4, a gene encoding the cellulose synthase-like protein D4, and is highly expressed in the roots at the seedling and tillering stages. Microscopic observation revealed the spo1 mutant had reduced number and width in leaf veins, smaller size of leaf bulliform cells, reduced cell length and cell area in the culm, and decreased width of epidermal cells in the outer glume of the grain. These results indicate the role of SPO1 in modulating cell division and cell expansion, which modulates plant architecture and organ size. It is showed that the contents of endogenous hormones including auxin, abscisic acid, gibberellin, and zeatin tested in the spo1 mutant were significantly altered, compared to the wild type. Furthermore, the transcriptome analysis revealed that the differentially expressed genes (DEGs) are significantly enriched in the pathways associated with plant hormone signal transduction, cell cycle progression, and cell wall formation. These results indicated that the loss of SPO1/OsCSLD4 function disrupted cell wall cellulose synthase and hormones homeostasis and signaling, thus leading to smaller plant and organ size in spo1. Taken together, we suggest the functional role of SPO1/OsCSLD4 in the control of rice plant and organ size by modulating cell division and expansion, likely through the effects of multiple hormonal pathways on cell wall formation.

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Characterization of a <i>Tos</i>17 Insertion Mutant of Rice Auxin Signal Transcription Factor Gene, <i>OsARF</i>24

Cited by 7 publications

References 25 publications

Auxin response factors

Auxin response factors

Characterization and Expression Patterns of Auxin Response Factors in Wheat

SMALL PLANT AND ORGAN 1 (SPO1) Encoding a Cellulose Synthase-like Protein D4 (OsCSLD4) Is an Important Regulator for Plant Architecture and Organ Size in Rice

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