Sulfite Reductase Defines a Newly Discovered Bottleneck for Assimilatory Sulfate Reduction and Is Essential for Growth and Development in Arabidopsis thaliana

Abstract Extracellular adenosine triphosphate (eATP) is an apoplastic signaling molecule that plays an essential role in the growth and development of plants. Arabidopsis seedlings have been reported to respond to eATP; however, the downstream signaling components are still not well understood. In this study, we report that an ethylene-responsive factor, Redox-Responsive Transcription Factor 1 (RRTF1), is involved in eATP-regulated Arabidopsis thaliana seedling growth. Exogenous adenosine triphosphate inhibited green seedling root growth and induced hypocotyl bending of etiolated seedlings. RRTF1 loss-of-function mutant (rrtf1) seedlings showed decreased responses to eATP, while its complementation or overexpression led to recovered or increased eATP responsiveness. RRTF1 was expressed rapidly after eATP stimulation and then migrated into the nuclei of root tip cells. eATP-induced auxin accumulation in root tip or hypocotyl cells was impaired in rrtf1. Chromatin immunoprecipitation and high-throughput sequencing results indicated that eATP induced some genes related to cell growth and development in wild type but not in rrtf1 cells. These results suggest that RRTF1 may be involved in eATP signaling by regulating functional gene expression and cell metabolism in Arabidopsis seedlings.

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Into the Evening: Complex Interactions in the Arabidopsis circadian clock

10.1101/068460 ◽

2016 ◽

Cited By ~ 1

Author(s):

He Huang ◽

Dmitri A. Nusinow

Keyword(s):

Arabidopsis Thaliana ◽

Circadian Clock ◽

Growth And Development ◽

Clock Genes ◽

Day Length ◽

Interacting Proteins ◽

Plant Growth And Development ◽

Complex Interactions ◽

New Findings ◽

Direct Regulation

AbstractIn Arabidopsis thaliana, an assembly of proteins named the evening complex (EC) has been established as an essential component of the circadian clock with conserved functions in regulating plant growth and development. Recent studies identifying EC-regulated genes and EC-interacting proteins have expanded our understanding of EC function. In this review, we focus on new progress uncovering how the EC contributes to the circadian network through the integration of environmental inputs and the direct regulation of key clock genes. We also summarize new findings of how the EC directly regulates clock outputs, such as day-length dependent and thermoresponsive growth, and provide new perspectives on future experiments to address unsolved questions related to the EC.

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Growth and development of AtMSH7 mutants in Arabidopsis thaliana

Plant Physiology and Biochemistry ◽

10.1016/j.plaphy.2019.11.035 ◽

2020 ◽

Vol 146 ◽

pp. 329-336 ◽

Cited By ~ 1

Author(s):

Michelle C. Chirinos-Arias ◽

Claudia P. Spampinato

Keyword(s):

Arabidopsis Thaliana ◽

Growth And Development

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Influence of Sublethal Concentrations of Herbicides and Growth Regulators on Mouseearcress (Arabidopsis thaliana) Progeny

Weed Science ◽

10.1017/s004317450008259x ◽

1985 ◽

Vol 33 (4) ◽

pp. 430-434 ◽

Cited By ~ 6

Author(s):

Ron Henzell ◽

John Phillips ◽

Peter Diggle

Keyword(s):

Arabidopsis Thaliana ◽

Electron Transport ◽

Plant Growth ◽

Growth Regulators ◽

Growth And Development ◽

Auxin Transport ◽

Photosynthetic Electron Transport ◽

Persistent Effect ◽

Transport Inhibitors ◽

Sublethal Concentrations

The influence of sublethal levels of a number of herbicides and plant growth regulators on the germinability of the seeds and the growth and development of seedlings of mouseearcress [Arabidopsis thaliana(L.) Heynh. ♯ ARBTH] was determined. Only 7 of the 22 chemicals tested had a persistent effect on progeny. Amitrole (3-amino-s-triazole) was one of the most effective compounds. It caused a characteristic bleaching only in shoot tips and pods in parent plants and appeared to act directly on the progeny by accumulation in the seed. Two auxin transport inhibitors, TIBA (2,3,5-triiodobenzoic acid) and CPII (5-O-carboxyphenyl-3-phenylisoxazole), and four of the six photosynthetic electron transport inhibitors included in the study also affected progeny. They appeared to act indirectly by interfering with seed development.

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