Auxin in action: signalling, transport and the control of plant growth and development

Teale, William; Paponov, Ivan A.; Palme, Klaus

doi:10.1038/nrm2020

Cited by 1,094 publications

(790 citation statements)

References 152 publications

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“…Importantly, SD-mediated regulation of growth cessation and dormancy in perennial plants appears to involve modulation of auxin responsiveness rather than auxin levels. This mechanism is in contrast to the majority of cellular responses regulated by auxin, which are mediated primarily via changes in cellular auxin contents (46).…”

Section: Sd0 Sd28 Sd42 Sd56 Sd0 Sd28 Sd42 Sd56mentioning

confidence: 95%

Activity–dormancy transition in the cambial meristem involves stage-specific modulation of auxin response in hybrid aspen

Baba

Karlberg²,

Schmidt³

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

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The molecular basis of short-day-induced growth cessation and dormancy in the meristems of perennial plants (e.g., forest trees growing in temperate and high-latitude regions) is poorly understood. Using global transcript profiling, we show distinct stagespecific alterations in auxin responsiveness of the transcriptome in the stem tissues during short-day-induced growth cessation and both the transition to and establishment of dormancy in the cambial meristem of hybrid aspen trees. This stage-specific modulation of auxin signaling appears to be controlled via distinct mechanisms. Whereas the induction of growth cessation in the cambium could involve induction of repressor auxin response factors (ARFs) and down-regulation of activator ARFs, dormancy is associated with perturbation of the activity of the SKP-Cullin-F-box TIR (SCF TIR ) complex, leading to potential stabilization of repressor auxin (AUX)/indole-3-acetic acid (IAA) proteins. Although the role of hormones, such as abscisic acid (ABA) and gibberellic acid (GA), in growth cessation and dormancy is well established, our data now implicate auxin in this process. Importantly, in contrast to most developmental processes in which regulation by auxin involves changes in cellular auxin contents, day-length-regulated induction of cambial growth cessation and dormancy involves changes in auxin responses rather than auxin content.short days | meristem identity P erennial plants growing in temperate and high-latitude regions anticipate the approach of winter by sensing the associated reduction in day length (1), and when the day length becomes shorter than the critical length permitting growth [short-day signal (SD)], cell division terminates in the meristems (1). Immediately following cessation of cell division, exposure of plants to permissive conditions (e.g., long days) leads to the reversal of growth arrest (2), and this stage of growth arrest is referred to as ecodormancy. Continued exposure of ecodormant plants to short days brings about the transition from ecodormancy to endodormancy (2). The endodormant state is characterized by the inability of the meristems to respond to growth-promotive signals in contrast to the ecodormant state. Exposure to chilling temperatures is required to restore the ability of endodormant meristems to respond to growth-promotive signals and to reinitiate growth subsequently (3).Recently, the photoreceptor PHYA (4) and homologs of the flowering time genes CONSTANS and FT (5, 6) have been shown to be early-acting components in SD-induced growth cessation in trees. The targets and signaling intermediates of the SD pathway downstream of these early-acting components in growth cessation and dormancy remain largely unexplored (7). Although ecodormant and endodormant states can be distinguished physiologically, the molecular mechanisms underlying the establishment of endodormancy and the inability of endodormant meristems to respond to growth-promotive signals have remained elusive.We investigated whether the SD-regulated induction o...

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Section: Sd0 Sd28 Sd42 Sd56 Sd0 Sd28 Sd42 Sd56mentioning

confidence: 95%

Activity–dormancy transition in the cambial meristem involves stage-specific modulation of auxin response in hybrid aspen

Baba

Karlberg²,

Schmidt³

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

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“…48 The level, signaling, and/or flow of IAA in stems and buds are involved in apical dominance. 5 The apical bud produces IAA that inhibits the growth of the lateral buds further down the stem toward the axillary buds. In addition, IAA plays a major role in leaf morphogenesis and vasculature network development.…”

Section: Iaa In Fungal -Plant Interactionsmentioning

confidence: 99%

“…Indole-3-acetic acid (IAA) is the most common plant hormone of the auxin class and it regulates various aspects of plant growth and development. [3][4][5] Thus, the terms "auxin" and "IAA" are occasionally used interchangeably. Despite the importance of IAA in plant development, knowledge of the evolution of IAA biosynthesis and the process by which natural selection shapes the biosynthetic pathways remains limited.…”

Section: Introductionmentioning

confidence: 99%

Indole-3-acetic acid: A widespread physiological code in interactions of fungi with other organisms

Wei

Chen

et al. 2015

Plant Signaling & Behavior

251

142

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“…Auxins constitute the oldest and one of the most well studied class of phytohormones. An expanse of literature is available on the various aspects of auxin action (for recent reviews see Fleming 2006;Hartig and Beck 2006;Quint and Gray, 2006;Teale et al, 2006;Tanaka et al, 2006;Able, 2007;Spaepen et al, 2007;Vieten et al, 2007). Recent years have witnessed a tremendous leap in our understanding of the role of auxin and mechanism of its regulation (Dharmasiri et al, 2005;Woodward et al, 2005).…”

Section: Auxin and Micro Rna In Plant Developmentmentioning

confidence: 99%

Fine tuning of auxin signaling by miRNAs

Teotia

Mukherjee

Sanan-Mishra

2008

Physiol Mol Biol Plants

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microRNAs (miRNAs) constitute a major class of endogenous non-coding regulatory small RNAs. They are present in a variety of organisms from algae to plants and play an important role in gene regulation. The miRNAs are involved in various biological processes, including differentiation, organ development, phase change, signaling, disease resistance and response to environmental stresses. This review provides a general background on the discovery, history, biogenesis and function of miRNAs. However, the focus is on the role for miRNA in controlling auxin signaling to regulate plant growth and development.

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Auxin in action: signalling, transport and the control of plant growth and development

Cited by 1,094 publications

References 152 publications

Activity–dormancy transition in the cambial meristem involves stage-specific modulation of auxin response in hybrid aspen

Activity–dormancy transition in the cambial meristem involves stage-specific modulation of auxin response in hybrid aspen

Indole-3-acetic acid: A widespread physiological code in interactions of fungi with other organisms

Fine tuning of auxin signaling by miRNAs

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