Ethylene Improves Root System Development under Cadmium Stress by Modulating Superoxide Anion Concentration in Arabidopsis thaliana

Abozeid, Ann; Ying, Z. Irene; Lin, Yingchao; Liu, Jia; Zhang, Zhonghua; Tang, Zhonghua

doi:10.3389/fpls.2017.00253

Cited by 67 publications

(30 citation statements)

References 83 publications

(94 reference statements)

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“…The research by Libik-Konieczny et al [59] on rhizogenesis showed the importance of redox balance system for this process, which could be mediated by preventing the negative effects of possible oxidative stress. Isoforms of superoxide dismutase (SOD) and peroxidase (POD) can play a significant role in regulating the content of hydrogen peroxide in the formation of root primordia, as well as in the process of root growth and development [59,60]. The accumulation of ROS in meristematic cells of root tips subjected to stress serves as a signal for autophagy [61].…”

Section: Discussionmentioning

confidence: 99%

Some Mechanisms Modulating the Root Growth of Various Wheat Species under Osmotic-Stress Conditions

Terletskaya

Lee

Altayeva

et al. 2020

Plants

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The role of the root in water supply and plant viability is especially important if plants are subjected to stress at the juvenile stage. This article describes the study of morphophysiological and cytological responses, as well as elements of the anatomical structure of primary roots of three wheat species, Triticum monococcum L., Triticum dicoccum Shuebl., and Triticum aestivum L., to osmotic stress. It was shown that the degree of plasticity of root morphology in water deficit affected the growth and development of aboveground organs. It was found that in conditions of osmotic stress, the anatomical root modulations were species-specific. In control conditions the increase in absolute values of root diameter was reduced with the increase in the ploidy of wheat species. Species-specific cytological responses to water deficit of apical meristem cells were also shown. The development of plasmolysis, interpreted as a symptom of reduced viability apical meristem cells, was revealed. A significant increase in enzymatic activity of superoxide dismutase under osmotic stress was found to be one of the mechanisms that could facilitate root elongation in adverse conditions. The tetraploid species T. dicoccum Shuebl. were confirmed as a source of traits of drought tolerant primary root system for crosses with wheat cultivars.

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Section: Discussionmentioning

confidence: 99%

Some Mechanisms Modulating the Root Growth of Various Wheat Species under Osmotic-Stress Conditions

Terletskaya

Lee

Altayeva

et al. 2020

Plants

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“…Furthermore, Chmielowska‐Bąk and Deckert () documented a NO‐mediated upregulation of ACS , and consequent induction of ethylene biosynthesis, a key element in stress‐related PCD. In fact, ethylene biosynthesis is responsible for the maintenance of SOD activity, and consequent lowering of O 2 ·− content, preventing necrosis (Abozeid et al ). In this sense, NO content seems to also be indirectly responsible for the threshold between PCD and necrotic cell death.…”

Section: No‐mediated Regulation Of Metal‐induced Oxidative Stressmentioning

confidence: 99%

Nitric oxide‐mediated regulation of oxidative stress in plants under metal stress: a review on molecular and biochemical aspects

Sharma

Soares

Sousa

et al. 2019

Physiologia Plantarum

122

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Given their sessile nature, plants continuously face unfavorable conditions throughout their life cycle, including water scarcity, extreme temperatures and soil pollution. Among all, metal(loid)s are one of the main classes of contaminants worldwide, posing a serious threat to plant growth and development. When in excess, metals which include both essential and non‐essential elements, quickly become phytotoxic, inducing the occurrence of oxidative stress. In this way, in order to ensure food production and safety, attempts to enhance plant tolerance to metal(loid)s are urgently needed. Nitric oxide (NO) is recognized as a signaling molecule, highly involved in multiple physiological events, like the response of plants to abiotic stress. Thus, substantial efforts have been made to assess NO potential in alleviating metal‐induced oxidative stress in plants. In this review, an updated overview of NO‐mediated protection against metal toxicity is provided. After carefully reviewing NO biosynthetic pathways, focus was given to the interaction between NO and the redox homeostasis followed by photosynthetic performance of plants under metal excess.

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“…Plant hormones including auxin, ethylene, cytokinin, abscisic acid, and brassinosteroid (BR) are small molecule regulators that play critical roles during plant growth and development (Ding & Friml, ; Tian et al, ). Accumulating evidence indicates that phytohormones also play crucial regulatory roles in response to a broad variety of environmental cues such as Aluminium (Al) stress and heavy metal stress including Cd stress (Abozeid et al, ; Yang et al, ). Previous studies indicated that Cd stress disturbs auxin homeostasis (Yu et al, ), and Yuan and Huang () showed that the pin1 pin3 pin7 triple mutant was less sensitive to Cd stress.…”

Section: Introductionmentioning

confidence: 99%

Ethylene promotes cadmium‐induced root growth inhibition through EIN3 controlled XTH33 and LSU1 expression in Arabidopsis

Kong

Zhang

et al. 2018

Plant Cell & Environment

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Cadmium (Cd) stress is one of the most serious heavy metal stresses limiting plant growth and development. However, the molecular mechanisms underlying Cd-induced root growth inhibition remain unclear. Here, we found that ethylene signalling positively regulates Cd-induced root growth inhibition. Arabidopsis seedlings pretreated with the ethylene precursor 1-aminocyclopropane-1-carboxylic acid exhibited enhanced Cd-induced root growth inhibition, whereas the addition of the ethylene biosynthesis inhibitor aminoethoxyvinyl glycine decreased Cd-induced root growth inhibition. Consistently, ethylene-insensitive mutants, such as ein4-1, ein3-1 eil1-1 double mutant, and EBF1ox, displayed an increased tolerance to Cd. Furthermore, we also observed that Cd inhibited EIN3 protein degradation, a process that was regulated by ethylene signalling. Genetic and biochemical analyses showed that EIN3 enhanced root growth inhibition under Cd stress through direct binding to the promoters and regulating the expression of XTH33 and LSU1, which encode key regulators of cell wall extension and sulfur metabolic process, respectively. Collectively, our study demonstrates that ethylene plays a positive role in Cd-regulated root growth inhibition through EIN3-mediated transcriptional regulation of XTH33 and LSU1 and provides a molecular framework for the integration of environmental signals and intrinsic regulators in modulating plant root growth.

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Ethylene Improves Root System Development under Cadmium Stress by Modulating Superoxide Anion Concentration in Arabidopsis thaliana

Cited by 67 publications

References 83 publications

Some Mechanisms Modulating the Root Growth of Various Wheat Species under Osmotic-Stress Conditions

Some Mechanisms Modulating the Root Growth of Various Wheat Species under Osmotic-Stress Conditions

Nitric oxide‐mediated regulation of oxidative stress in plants under metal stress: a review on molecular and biochemical aspects

Ethylene promotes cadmium‐induced root growth inhibition through EIN3 controlled XTH33 and LSU1 expression in Arabidopsis

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