Ethylene Biosynthesis and Signaling Networks

Wang, Kevin L.-C.; Li, Hai; Ecker, Joseph R.

doi:10.1105/tpc.001768

Cited by 1,574 publications

(1,315 citation statements)

References 150 publications

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“…The S‐ADENOSYLMETHIONINE SYNTHETASE orthologs appear to have undergone specific adaptive evolution, independently during both D. fuchsii and D. incarnata histories. S‐adenosylmethionine acts as a universal methyl group donor in transmethylation reactions, but also serves as a precursor to the phytohormone ethylene, implicated in the control of numerous developmental processes, and regulating resistance to bacterial and fungal pathogens, nematodes and lepidopteran herbivores (Wang, Li, & Ecker, 2002). …”

Section: Discussionmentioning

confidence: 99%

Adaptive sequence evolution is driven by biotic stress in a pair of orchid species (Dactylorhiza) with distinct ecological optima

et al. 2017

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The orchid family is the largest in the angiosperms, but little is known about the molecular basis of the significant variation they exhibit. We investigate here the transcriptomic divergence between two European terrestrial orchids, Dactylorhiza incarnata and Dactylorhiza fuchsii, and integrate these results in the context of their distinct ecologies that we also document. Clear signals of lineage‐specific adaptive evolution of protein‐coding sequences are identified, notably targeting elements of biotic defence, including both physical and chemical adaptations in the context of divergent pools of pathogens and herbivores. In turn, a substantial regulatory divergence between the two species appears linked to adaptation/acclimation to abiotic conditions. Several of the pathways affected by differential expression are also targeted by deviating post‐transcriptional regulation via sRNAs. Finally, D. incarnata appears to suffer from insufficient sRNA control over the activity of RNA‐dependent DNA polymerase, resulting in increased activity of class I transposable elements and, over time, in larger genome size than that of D. fuchsii. The extensive molecular divergence between the two species suggests significant genomic and transcriptomic shock in their hybrids and offers insights into the difficulty of coexistence at the homoploid level. Altogether, biological response to selection, accumulated during the history of these orchids, appears governed by their microenvironmental context, in which biotic and abiotic pressures act synergistically to shape transcriptome structure, expression and regulation.

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Section: Discussionmentioning

confidence: 99%

Adaptive sequence evolution is driven by biotic stress in a pair of orchid species (Dactylorhiza) with distinct ecological optima

et al. 2017

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“…Transcripts similar to aldehyde oxidase 1 (AAO1) and ethylene forming enzyme-like (EFE-like) dioxygenase were down-regulated in RB compared to SB at both 24 and 48 hai. AAO1 is involved in the final steps of the auxin and ABA biosynthesis pathway [54] and EFE-like catalyzes ACC oxidase in the final step of ET biosynthesis [55]. Also, transcripts encoding ethylene response element binding protein 1 (EREBP1) and OsWRKY45, an ABA inducible gene with a disease resistance component [56] were altered in response greenbug feeding.…”

Section: Phytohormone Signaling and Transcriptional Regulationmentioning

confidence: 99%

Transcriptomics of induced defense responses to greenbug aphid feeding in near isogenic wheat lines

et al. 2013

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“…EREBPs are transcription factors induced by ethylene and involved in ethylene responses [20]. A number of transcripts for ROSgenerating enzymes were switched on at the second time point: a respiratory burst oxidase AtRbohC, germin oxalate oxidase, and several peroxidases and oxidoreductases with the ability to generate ROS, suggesting a biphasic oxidative burst involvement in the cell death process [22,23].…”

Section: Distinct Stages Of the Cell Death Processmentioning

confidence: 99%

“…The effect is distinct from the light-dependent leaf cell death, as initially seeds germinate but the newly emerged seedlings do not grow and eventually die 2 weeks after germination (data not shown). ROS can increase ethylene production through activation of 1-aminocyclopropane-1-carboxylic acid synthase (ACC synthase) and transcription upregulation of 1-aminocyclopropane-1-carboxylic acid oxidase (ACC oxidase), two enzymes involved in ethylene biosynthesis [20]. In turn, ethylene can greatly potentiate the oxidative burst [29].…”

Section: Distinct Stages Of the Cell Death Processmentioning

confidence: 99%

“…An oxidative burst and production of ethylene are two early events triggered by the AAL toxin and both have important roles in regulating PCD The most upregulated genes at the first time point were EREBP-3-like and a GST, genes known to respond to eth- ylene and H 2 O 2 , respectively [20,21]. EREBPs are transcription factors induced by ethylene and involved in ethylene responses [20].…”

Section: Distinct Stages Of the Cell Death Processmentioning

confidence: 99%

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An extensive microarray analysis of AAL-toxin-induced cell death in Arabidopsis thaliana brings new insights into the complexity of programmed cell death in plants

Gechev

Gadjev

Hille

2004

Cellular and Molecular Life Sciences (CMLS)

129

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An extensive microarray analysis of AAL-toxin-induced cell death in Arabidopsis thaliana brings new insights into the complexity of programmed cell death in plants Gechev, T.S.; Gadjev, I.Z.; Hille, J. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract. A T-DNA knockout of the Arabidopsis homologue of the tomato disease resistance gene Asc was obtained. The asc gene renders plants sensitive to programmed cell death (PCD) triggered by the fungal AAL toxin. To obtain more insights into the nature of AALtoxin-induced cell death and to identify genes of potential importance for PCD, we carried out transcription profiling of AAL-toxin-induced cell death in this knockout with an oligonucleotide array representing 21,500 Arabidopsis genes. Genes responsive to reactive oxygen species (ROS) and ethylene were among the earliest to be upregulated, suggesting that an oxidative burst and production of ethylene played a role in the activation of the cell death. This notion was corroborated by induction of several genes encoding ROS-generating proteins, including a respiratory burst oxidase and germin oxalate oxi- CMLS, Cell. Mol. Life Sci. 61 (2004) 1185 -1197 1420-682X/04/101185-13 DOI 10.1007/s00018-004-4067-2 © Birkhäuser Verlag, Basel, 2004 CMLS Cellular and Molecular Life Sciences dase. Cytochemical studies confirmed the oxidative burst and, in addition, showed synthesis of callose, a feature of the hypersensitive response. A diverse group of transcription factors was also induced. These events were followed by repression of most of the auxin-regulated genes known to be involved in growth and developmental responses. All photosynthesis-related genes were repressed. Blocking the synthesis of ethylene or NO significantly compromised cell death. In addition, we identified a heterogeneous group of early-induced genes, some of them never before associated with PCD. The group of earlyinduced genes included a number of proteases that were previously implicated in developmentally regulated types of PCD, suggesting a more principal role for these proteases in the PCD process. These findings provide new insights into the molecular mechanisms of plant PCD.

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Ethylene Biosynthesis and Signaling Networks

Abstract: Article, publication date, and citation information can be found at www.plantcell.org/cgi/

Cited by 1,574 publications

References 150 publications

Adaptive sequence evolution is driven by biotic stress in a pair of orchid species (Dactylorhiza) with distinct ecological optima

Adaptive sequence evolution is driven by biotic stress in a pair of orchid species (Dactylorhiza) with distinct ecological optima

Transcriptomics of induced defense responses to greenbug aphid feeding in near isogenic wheat lines

An extensive microarray analysis of AAL-toxin-induced cell death in Arabidopsis thaliana brings new insights into the complexity of programmed cell death in plants

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