EIN2 and EIN3 in Ethylene Signalling

Cho, Young Hee; Lee, Sangho; Yoo, Sang Dong

doi:10.1002/9781118223086.ch7

Cited by 4 publications

(2 citation statements)

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“…3.4C). The integral membrane domain of EIN2 shows similarity with the disease-related NRAMP (NATURAL RESISTANCE-ASSOCIATED MACROPHAGE PROTEIN) family of metal-ion transporters such as AtNRAMP1 (Cho et al, 2012), which represents the outgroup in our phylogenetic analysis. The differences in ScEIN2A transcript levels in leaf, culm and root are statistically significant (Fig.…”

Section: The Ethylene Signaling Members In Sugarcanementioning

confidence: 99%

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Transcriptional regulation of ethylene biosynthesis and signaling genes in sugarcane

Alessio¹

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Ethylene is a gaseous plant hormone involved in many phases of development and in responses to biotic and abiotic stresses. In sugarcane fields, the application of ethylene precursors accelerates the ripening process and inhibits flowering. In plant cells, the ACS (ACC synthase) and ACO (ACC oxidase) enzymes catalyze the ethylene production, which is perceived by a group of receptors triggering a signaling cascade and resulting in the activation and repression of transcription factors. The sugarcane genes encoding ethylene biosynthesis and signaling proteins and their transcriptional regulation are barely known. The major aim of this work was to characterize the transcriptional regulators of the ScACS2 gene, encoding an ACS from sugarcane. Three bHLH (Basic Helix-loop-Helix) transcription factors from the FBH (FLOWERING BHLH) subfamily were isolated by their ability to bind in the promoter of ScACS2 gene. These factors are more expressed in maturing internodes where they activate ScACS2 expression as homo-and heterodimers. Functional studies in Arabidopsis demonstrated that FBHs control ethylene biosynthesis regulating ACS transcription, suggesting that this mechanism is conserved across plant species. We also aimed to identify the key genes involved in ethylene biosynthesis and evaluate their regulation in sugarcane. We identified several other members of ethylene biosynthesis and signaling pathways, homologs of Arabidopsis ACS, ACO, ETR, CTR1, EIN2 and EIN3. We found that they are differentially regulated in different plant organs and in response to drought.

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Section: The Ethylene Signaling Members In Sugarcanementioning

confidence: 99%

“…EIN2 protein accumulation correlates with EIN3 accumulation in the Arabidopsis nucleus, triggering primary transcription through EIN3-binding sites (EBS) in the promoters of target genes such as ERF1 (ETHYLENE RESPONSIVE FACTOR 1) (Cho et al, 2012).…”

Section: The Ethylene Signaling Members In Sugarcanementioning

confidence: 99%

Transcriptional regulation of ethylene biosynthesis and signaling genes in sugarcane

Alessio¹

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Ethylene signaling: simple ligand, complex regulation

Merchante

Alonso

Stepanova

2013

Current Opinion in Plant Biology

251

174

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Submergence deactivates wound-induced plant defence against herbivores

et al. 2020

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Flooding is a common and critical disaster in agriculture, because it causes defects in plant growth and even crop loss. An increase in herbivore populations is often observed after floods, which leads to additional damage to the plants. Although molecular mechanisms underlying the plant responses to flooding have been identified, how plant defence systems are affected by flooding remains poorly understood. Herein, we show that submergence deactivates wound-induced defence against herbivore attack in Arabidopsis thaliana. Submergence rapidly suppressed the wound-induced expression of jasmonic acid (JA) biosynthesis genes, resulting in reduced JA accumulation. While plants exposed to hypoxia in argon gas exhibited similar reduced wound responses, the inhibitory effects were initiated after short-term submergence without signs for lack of oxygen. Instead, expression of ethylene-responsive genes was increased after short-term submergence. Blocking ethylene signalling by ein2-1 mutation partially restored suppressed expression of several wound-responsive genes by submergence. In addition, submergence rapidly removed active markers of histone modifications at a gene locus involved in JA biosynthesis. Our findings suggest that submergence inactivates defence systems of plants, which would explain the proliferation of herbivores after flooding.

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EIN2 and EIN3 in Ethylene Signalling

Cited by 4 publications

References 58 publications

Transcriptional regulation of ethylene biosynthesis and signaling genes in sugarcane

Transcriptional regulation of ethylene biosynthesis and signaling genes in sugarcane

Ethylene signaling: simple ligand, complex regulation

Submergence deactivates wound-induced plant defence against herbivores

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