The reinforcement of potato cell wall as part of the phosphite-induced tolerance to UV-B radiation

Machinandiarena, Milagros Florencia; Oyarburo, Natalia Soledad; Daleo, Gustavo Raúl; Andreu, Adriana Balbina; Olivieri, F. P.

doi:10.1007/s10535-018-0780-9

Cited by 7 publications

(4 citation statements)

References 48 publications

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“…The application of NaHS increased the biosynthesis of abscisic acid and promoted stomatal closure in wheat plants (Ma et al, 2016). KPhi also acted in the potentiation of the sunflower antioxidant system in the WD condition via increasing POX activity, which corroborates observations in potato plants (Oyarburo et al, 2015;Machinandiarena et al, 2018).…”

Section: Resultssupporting

confidence: 76%

“…Therefore, the ETR/A results corroborate the A/C i , parameter, indicate a disturbance in the assimilation of CO 2 that was not only due to the stomatic restriction. Notably, KPhi, H 2 S, and ZS were reported to alleviate the harmful effects of stress on photosynthetic machinery (Oyarburo et al, 2015;Ma et al, 2017), and act as inducers of the antioxidant defense system (Machinandiarena et al, 2018;Corpas, 2019), but no stress-alleviating effects of these substances were observed in the photosynthetic process of sunflower plants.…”

Section: Resultsmentioning

confidence: 99%

“…Potassium phosphite (KPhi) was initially proposed as a protective fungicide, but studies described its potential as a plant biostimulant, and it induced tolerance to abiotic stresses (Gómez-Merino;Trejo-Téllez, 2015). This effect was verified via the stimulation of antioxidant enzymes, such as superoxide dismutase (SOD), ascorbate peroxidase (APX) and guaiacol peroxidase (POX) (Oyarburo et al, 2015;Machinandiarena et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen sulfide, potassium phosphite and zinc sulfate as alleviators of drought stress in sunflower plants

et al. 2020

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Drought is the most harmful environmental factor crop productivity. Some chemicals are used in agriculture to mitigate the damage from this stress on plants. Therefore, we examined whether the spraying of zinc sulfate (ZS), potassium phosphite (KPhi) and the hydrogen sulfide (H2S) donor sodium hydrosulfide (NaHS) would mitigate the deleterious effects of water deficit on sunflower plants by analyzing physiological and biometric characteristics. The experiment was carried out in a greenhouse using a randomized block design with five replications. The treatments were arranged in a 4 x 2 factorial scheme: [Factor A (Alleviators)] - spraying of KPhi (0.5 L ha-1), ZS (3.2 kg ha-1), NaHS (1.2 g ha-1), and water; [Factor B (substrate humidity, SH)] - 100% (well irrigated) and 30% (water deficit, WD) of field capacity. Under WD conditions, alleviators led to the maintenance of higher values of water potential (ΨW), a lower content of leaf malonaldehyde (MDA), and increased activity of the antioxidant enzyme peroxidase (POX), except for ZS. However, leaf osmotic potential, proline concentration, variables related to gas exchange and chlorophyll a fluorescence, and biometric characteristics differed only according to the SH factor. The results of ΨW and MDA for sunflower plants under WD are indicative of the mitigating capacity of ZS, KPhi, and H2S. Thus, the spraying of these compounds on sunflower plants mitigates the effects of WD, acting specifically in physiological processes related to antioxidant responses and in the maintenance of water in leaf tissues.

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrogen sulfide, potassium phosphite and zinc sulfate as alleviators of drought stress in sunflower plants

et al. 2020

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“…Leaf cell walls in fas1 and fas2 mutants increase their thickness after UV‐B exposure, these changes in cell wall properties may also raise their UV‐B absorption properties, and as a consequence, absorbance by cell wall components may protect the cells against DNA damage. Some plant cell wall components, such as phenolic compounds, have been previously demonstrated to act as UV‐screening molecules, increasing tolerance against UV‐B (Machinandiarena, Oyarburo, Daleo, Andreu, & Olivieri, ; Pontin et al, ; Ruiz et al, ). Moreover, our results show that CAF‐1 mutants accumulate higher levels of soluble UV‐B absorbing compounds, similarly as what is was previously shown in det1 mutants, which have altered chromatin architecture and accumulate higher UV sunscreen compounds (Castells et al, ).…”

Section: Discussionmentioning

confidence: 99%

AtCAF‐1 mutants show different DNA damage responses after ultraviolet‐B than those activated by other genotoxic agents in leaves

Maulión

Gómez

Bustamante

2019

Plant Cell & Environment

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Chromatin assembly factor-1 (CAF-1) is a histone H3/H4 chaperone that participates in DNA and chromatin interaction processes. In this manuscript, we show that organs from CAF-1 deficient plants respond differently to ultraviolet-B (UV-B) radiation than to other genotoxic stresses. For example, CAF-1 deficient leaves tolerate better UV-B radiation, showing lower cyclobutane pyrimidine dimer (CPD) accumulation, lower inhibition of cell proliferation, increased cell wall thickness, UV-B absorbing compounds, and ploidy levels, whereas previous data from different groups have shown that CAF-1 mutants show shortening of telomeres, loss of 45S rDNA, and increased homologous recombination, phenotypes associated to DNA breaks. Interestingly, CAF-1 deficient roots show increased inhibition of primary root elongation, with decreased meristem size due to a higher inhibition of cell proliferation after UV-B exposure. The decrease in root meristem size in CAF-1 mutants is a consequence of defects in programmed cell death after UV-B exposure. Together, we provide evidence demonstrating that root and shoot meristematic cells may have distinct protection mechanisms against CPD accumulation by UV-B, which may be linked with different functions of the CAF-1 complex in these different organs.

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Antioxidant Defense System and Reactive Oxygen Species (ROS) Interplay in Plants Under Drought Condition

Nawaz

Anjum

Ashraf

et al. 2021

Handbook of Climate Change Management

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The reinforcement of potato cell wall as part of the phosphite-induced tolerance to UV-B radiation

Cited by 7 publications

References 48 publications

Hydrogen sulfide, potassium phosphite and zinc sulfate as alleviators of drought stress in sunflower plants

Hydrogen sulfide, potassium phosphite and zinc sulfate as alleviators of drought stress in sunflower plants

AtCAF‐1 mutants show different DNA damage responses after ultraviolet‐B than those activated by other genotoxic agents in leaves

Antioxidant Defense System and Reactive Oxygen Species (ROS) Interplay in Plants Under Drought Condition

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