Indole-3-butyric acid priming reduced cadmium toxicity in barley root tip via NO generation and enhanced glutathione peroxidase activity

Demecsová, Loriana; Zelinová, Veronika; Liptáková, Ľubica; Valentovičová, Katarína; Tamás, Ladislav

doi:10.1007/s00425-020-03451-w

Cited by 16 publications

(7 citation statements)

References 74 publications

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“…It is known that exogenous auxin can act as a chelating agent [42] because auxin occurs in a deprotonated form in the cytoplasm, which has a high affinity to Cd. The second way is that exogenously applied auxin probably supplements the reduced internal levels of auxin, which can affect the level of signaling molecules, for example NO, [14,15] and can be also involved in the signaling pathways of the defense mechanisms [30], for example biosynthesis of metal-binding ligands, phytochelatins, and glutathione [42]. The theory about the auxin signaling pathway in the defense mechanisms is also supported by our results.…”

Section: Discussionsupporting

confidence: 76%

“…Therefore, this may indicate the regulatory role of IAA in the ascorbate-glutathione cycle that may contribute to Cd alleviation. On the other hand, Demecsová et al [14] found that IBA induces a high production of nitric oxide (NO) which effectively reduces high levels of superoxide via the formation of peroxynitrite (ONOO − ). One of the pathways of NO production during IBA treatment is due to the conversion of IBA to IAA.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Exogenous Application of Indole-3-Butyric Acid on Maize Plants Cultivated in the Presence or Absence of Cadmium

Šípošová

Labancová

Kučerová

et al. 2021

Plants

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Auxins are plant hormones that affect plant growth, development, and improve a plant’s tolerance to stress. In this study, we found that the application of indole-3-butyric acid (IBA) had diverse effects on the growth of maize (Zea mays L.) roots treated without/with Cd. IBA caused changes in the growth and morphology of the roots under non-stress conditions; hence, we were able to select two concentrations of IBA (10−11 M as stimulatory and 10−7 M as inhibitory). IBA in stimulatory concentration did not affect the concentration of H2O2 or the activity of antioxidant enzymes while IBA in inhibitory concentration increased only the concentration of H2O2 (40.6%). The application of IBA also affected the concentrations of mineral nutrients. IBA in stimulatory concentration increased the concentration of N, K, Ca, S, and Zn (5.8–14.8%) and in inhibitory concentration decreased concentration of P, K, Ca, S, Fe, Mn, Zn, and Cu (5.5–36.6%). Moreover, IBA in the concentration 10−9 M had the most positive effects on the plants cultivated with Cd. It decreased the concentration of H2O2 (34.3%), the activity of antioxidant enzymes (23.7–36.4%), and increased the concentration of all followed elements, except Mg (5.5–34.1%), when compared to the Cd.

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Section: Discussionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Effects of Exogenous Application of Indole-3-Butyric Acid on Maize Plants Cultivated in the Presence or Absence of Cadmium

Šípošová

Labancová

Kučerová

et al. 2021

Plants

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“…Furthermore, it has been described that Cd not only affects IAA content but also its distribution, metabolism, and transport (Chmielowska-Bak et al 2014), suggesting an eventual switch to an alternative morphogenic root program to counteract metal stress (Hu et al 2013;Fattorini et al 2017;Piacentini et al 2020). Numerous reports also indicate that the exogenous application of IAA, as well as the IAA precursor indole-3-butyric acid (IBA), reduced Cd toxicity in plants (Agami and Mohamed 2013;Li et al 2020b;Zhang et al 2020;Zhou et al 2020;Piacentini et al 2020;Demecsová et al 2020). However, further information is needed to know whether the endogenous IAA levels reached in maize root during Cd stress can induce a similar effect compared to that observed when IAA is exogenously added.…”

Section: Cadmium Altered Hormonal Root Homeostasismentioning

confidence: 99%

Biochemical and hormonal changes associated with root growth restriction under cadmium stress during maize (Zea mays L.) pre-emergence

2021

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Cadmium (Cd) pollution of agricultural soils is a growing global concern. Plant growth restriction is the main visible symptom of Cd toxicity, and this metal may be particularly harmful to the preformed, seminal root during the pre-emergence stage. In the present study, we focused on Cd phytotoxicity in seminal root growth, nutrient composition, redox status, and hormone homeostasis during the pre-emergence stage of maize (Zea mays L) plants, distinguishing between the root apex and the remaining root tissue. After 72 h of metal exposure (50 and 100 µM CdCl 2 ), root length and biomass, as well as Ca, Fe, Mg, and Mn contents, were diminished. A redox imbalance was evidenced by changes in peroxidase activities and the ascorbate-dehydroascorbate ratio decreased in both root parts. There were fewer carbonylated proteins in both root fractions after exposure to 50 µM Cd, compared to 100 µM Cd, which was related to increased 20S proteasome activities. Cd incremented ABA, IAA, and SA contents, but drastically reduced the biologically active gibberellin GA4 and the conjugate jasmonoyl-isoleucine (JA-Ile). We demonstrated that the whole root tissue is involved in the maize response to Cd stress, which entails redox and hormonal rearrangements, probably directed to widen the plant defense lines at the expense of root growth.

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“…Exogenous SL-alleviated Cd toxicity might be due to increasing the contents of competitive micronutrients (Fe, Zn, and Mn) and reducing Cd uptake . In barley, addition of strigolactone GR24 or IAA effectively improves Cd tolerance via regulating Cd uptake and antioxidant defense systems and enhancing NO signaling to mitigate ROS toxicity. , SA-induced NO generation increases pectin and lignin synthesis to reduce Cd accumulation in roots and shoots …”

Section: Introductionmentioning

confidence: 99%

“…106 In barley, addition of strigolactone GR24 or IAA effectively improves Cd tolerance via regulating Cd uptake and antioxidant defense systems and enhancing NO signaling to mitigate ROS toxicity. 107,108 SAinduced NO generation increases pectin and lignin synthesis to reduce Cd accumulation in roots and shoots. 94 Microorganism-Assisted Remediation.…”

Section: ■ Introductionmentioning

confidence: 99%

Cadmium in Cereal Crops: Uptake and Transport Mechanisms and Minimizing Strategies

Chen

et al. 2022

J. Agric. Food Chem.

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Cadmium (Cd) contamination in soils and accumulation in cereal grains have posed food security risks and serious health concerns worldwide. Understanding the Cd transport process and its management for minimizing Cd accumulation in cereals may help to improve crop growth and grain quality. In this review, we summarize Cd uptake, translocation, and accumulation mechanisms in cereal crops and discuss efficient measures to reduce Cd uptake as well as potential remediation strategies, including the applications of plant growth regulators, microbes, nanoparticles, and cropping systems and developing low-Cd grain cultivars by CRISPR/Cas9. In addition, miRNAs modulate Cd translocation, and accumulation in crops through the regulation of their target genes was revealed. Combined use of multiple remediation methods may successfully decrease Cd concentrations in cereals. The findings in this review provide some insights into innovative and applicable approaches for reducing Cd accumulation in cereal grains and sustainable management of Cd-contaminated paddy fields.

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Indole-3-butyric acid priming reduced cadmium toxicity in barley root tip via NO generation and enhanced glutathione peroxidase activity

Cited by 16 publications

References 74 publications

Effects of Exogenous Application of Indole-3-Butyric Acid on Maize Plants Cultivated in the Presence or Absence of Cadmium

Effects of Exogenous Application of Indole-3-Butyric Acid on Maize Plants Cultivated in the Presence or Absence of Cadmium

Biochemical and hormonal changes associated with root growth restriction under cadmium stress during maize (Zea mays L.) pre-emergence

Cadmium in Cereal Crops: Uptake and Transport Mechanisms and Minimizing Strategies

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