Special Issue "Ethylene Signaling and Crosstalk in Plant Responses to Abiotic Stress"
Deadline for manuscript submissions: 15 December 2021.
Interests: plant hormones; ethylene; cytokinins; cell type specificity of hormonal signaling and crosstalk; dehydrins; expression of stress-inducible proteins
Ethylene plays an important role in controlling the morphological and molecular processes observed in plants subjected to environmental stress. Besides being a major stress hormone, it modulates virtually every stage in plant development as a response to developmental cues. The characterization of a number of ethylene mutants has revealed the major players in the ethylene signaling cascade, providing tools to elucidate its molecular mechanism and sites of action. It should be marked that the undoubted progress made in understanding the function of ethylene signals under stress has also put in focus some new research questions. For example, there are still many gaps in knowledge regarding the role of ethylene-responsive transcription factors (AP2/ERF) as a source to target ethylene crosstalk with other hormones under unfavorable environment. A mechanistic understanding of how different hormones coordinate their action in order to help the plants to adapt to different environmental conditions could be useful in crop management and improvement. Another hot topic is the role of the ethylene precursor 1-Aminocyclopropane 1-Carboxylic Acid (ACC) under abiotic stress since an increasing number of studies have established that ACC acts as a signaling molecule beyond its function in ethylene biosynthesis.
Plant growth and development depend on signals perceived in distinct cell types where hormonal inputs are transformed into orchestrated responses. In this line of thought, the cell type-specific ethylene signal transduction and its role in various adaptive mechanisms remain relatively unexplored. A limited number of studies are dealing with the involvement of ethylene signals in epigenetic regulation of stress responses and epigenetic stress memory.
This Special Issue welcomes contributions from research teams working in the field of ethylene signaling and crosstalk under abiotic stress. Submission of articles featuring original studies addressing the aforementioned topics in different plant model species, economically important crops, ornamental and medicinal plants are encouraged.
Professor Irina Vaseva
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- abiotic stress
- ethylene signaling
- 1-Aminocyclopropane 1-Carboxylic Acid (ACC)
- ethylene-responsive transcription factors
- ethylene-regulated stress-inducible proteins
- hormonal crosstalk
- cell type specificity
- model and medicinal plants
- economically important crops
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Comparative study of several Fe deficiency responses in the Arabidopsis thaliana ethylene insensitive mutants ein2-1 and ein2-5
Authors: Macarena Angulo 2; Francisco Javier Romera 2; Esteban Alcántara 2; Carlos Lucena; Rafael Pérez-Vicente 1; María José García 1,*
Affiliation: 1Department of Botany, Ecology and Plant Physiology, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Campus de Rabanales, Edificio Celestino Mutis, 14071 Córdoba, Spain 2Department of Agronomy, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Campus de Rabanales, Edificio Celestino Mutis, 14071 Córdoba, Spain
Abstract: Iron (Fe) is an essential micronutrient for plants since it participates in essential processes such us photosynthesis, respiration and nitrogen assimilation. Fe is an abundant element in soils but its availability for plants is low. Fe deficiency causes Fe chlorosis which can affects the productivity of the affected crops. Plants favor Fe acquisition by developing morphological and physiological responses in their roots. Ethylene and nitric oxide (NO) have been involved in the up-regulation of Fe deficiency responses in dicot plants. In this work, it has been conducted a comparative study of the main morphological and physiological responses to Fe deficiency in the Arabidopsis thaliana ethylene insensitive mutants ein2-1 and ein2-5, affected in EIN2, a key protein of the ethylene transduction pathway. The differential behavior of both mutants under Fe deficiency conditions and in response to 1-aminocyclopropane-1-carboxylate (ACC) or S-nitrosoglutathione (GSNO) treatment will be discussed.
Title: The diverse salt stress response of Arabidopsis ctr1-1 and ein2-1 ethylene signaling mutants is linked to altered root auxin homeostasis
Authors: Irina I. Vaseva 1; Kiril Mishev 1; Thomas Depaepe 2; Valya Vassileva 1; Dominique Van Der Straeten 2
Affiliation: 1Department of Molecular Biology and Genetics, Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bldg. 21, 1113 Sofia, Bulgaria 2Laboratory of Functional Plant Biology, Department of Biology, Ghent University, K.L. Ledeganckststraat 35, B-9000 Ghent, Belgium
Abstract: We explored the interplay between ethylene signals and the auxin pool in roots exposed to high salinity using Arabidopsis wild type plants (Col-0), and the ethylene signaling mutants ctr1-1 and ein2-1. The negative effect of salt stress on the root elongation was less pronounced in ctr1-1 individuals. They also exhibited altered gravitropic response under both normal and salt stress conditions. These ctr1-1 responses were found to be concomitant with high root auxin levels evaluated by the introduced auxin reporter pDR5::GUS. The constitutive mutant (ctr1-1)showed augmented auxin signaling both in the control conditions and when exposed to 100 mM NaCl. In contrast, the ethylene insensitive ein2-1 plants appeared depleted in active auxins. The salt stress-induced auxin signaling in pDR5::GUS (Col-0) was demonstrated to be linked to auxin accumulation using the R2D2 auxin sensor line, which allowed mapping this active auxin increase to the root epidermal cells in the Cell Division Zone (CDZ). The involvement of ethylene/auxin crosstalk in the salt stress response was evaluated by introducing auxin reporters for local biosynthesis (pTAR2::GUS) and polar transport (pLAX3::GUS, pAUX1::AUX1-YFP, pPIN1::PIN1-GFP, pPIN2::GFP, and pPIN3::GUS) in the mutants via genetic crosses and subsequent monitoring of their expression in homozygous F3 plants. In contrast to the wild type and the ethylene insensitive ein2-1 plants, the ctr1-1 individuals had a strong pTAR2::GUS expression both in the shoot and in the primary root suggesting that the constantly operating ethylene signaling pathway in the mutant was linked to increased auxin biosynthesis. The strong expression of the auxin biosynthesis reporter in ctr1-1 background remained stable 48 h after stress exposure. The higher relative abundance of AUX1, LAX3, and PIN1 transcripts in the roots of ctr1-1 plants grown on media with high salt concentration was revealed by qRT-PCR analyses. This trend was also confirmed in the crosses of the mutants with the auxin transport reporters. These results imply that the better performance of ctr1-1 mutant at high salinity could be related to the altered ethylene/auxin regulatory loop manifested by a stabilized local auxin biosynthesis and transport.
Title: To fight or to grow: the balancing role of ethylene in plant abiotic stress responses
Authors: Hao Chen; Jose M. Alonso; Anna N. Stepanova
Affiliation: Department of Plant and Microbial Biology, Program in Genetics, North Carolina State University, Raleigh, NC 27695, USA
Abstract: Plants often live in adverse environmental conditions and are exposed to various stresses, such as heat, cold, heavy metals, salt, radiation, poor lighting, nutrient deficiency, drought or flooding. To adapt to unfavorable environments, plants have evolved specialized molecular mechanisms that serve to balance the trade-off between abiotic stress responses and growth. These mechanisms enable plants to continue to develop and reproduce even under adverse conditions. Ethylene, as a key growth regulator, is leveraged by plants to mitigate the negative effects of some of these stresses on plant development and growth. By cooperating with other hormones, such as jasmonic acid, abscisic acid, auxin, and brassinosteroids, ethylene triggers the antioxidative defense in response to stress and coordinates the recovery of plant growth and photosynthetic efficiency. This review describes the crosstalk between ethylene and other plant hormones in tipping the balance between plant growth and abiotic stress responses.