&lt;b&gt;Lipid peroxidation and antioxidant enzymes of &lt;i&gt;Jatropha curcas&lt;/i&gt; L. seeds stored at different maturity stages

Silva, Laércio Junio da; Dias, Denise Cunha Fernandes dos Santos; Sekita, Marcelo Coelho; Finger, Fernando Luíz

doi:10.4025/actasciagron.v40i1.34978

Cited by 27 publications

(22 citation statements)

References 35 publications

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“…However, in the majority of seeds, doubled H 2 O 2 levels did not overlap with significantly increased TBARS levels, allowing us to hypothesize that lipid peroxidation is not the result of accumulated H 2 O 2 but more likely lipid auto-oxidation is the origin of increased membrane permeability. Particularly, auto-oxidation is intensified in seeds dried below 6% MC [63].…”

Section: Oxidation Processes In Stored Seedsmentioning

confidence: 98%

Oxidation processes related to seed storage and seedling growth of Malus sylvestris, Prunus avium and Prunus padus

et al. 2020

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Seeds stored in controlled conditions in gene banks, faster or slower lose their viability. The effects of seed moisture content levels (ca. 5, 8, 11%) combined with storage temperatures (-3˚,-18˚,-196˚C) were investigated in terms of the description of seeds defined as orthodox under oxidative stress after seed storage, during germination, and initial seedling growth. Hydrogen peroxide (H 2 O 2), thiobarbituric acid reactive substances (TBARS) and ascorbate (Asc) were analyzed in relation to seed germinability and seedlings emergence in three species: Malus sylvestris L., Prunus avium L. and Prunus padus L. The effect of seed storage conditions on H 2 O 2 levels appeared in germinated seeds after the third year of storage in each species. The H 2 O 2 levels were negatively correlated with the germination and seedling emergence of P. avium seeds after three years of storage under all examined combinations. The emergence of P. padus seedlings was not linked to any of the stress markers tested. The P. padus seed biochemical traits were least altered by storage conditions, and the seeds produced tolerant seedlings of relatively high levels of H 2 O 2 and TBARS. To cope with different H 2 O 2 levels, TBARS levels, and Asc levels in seeds of three species varying storage conditions different molecular responses, i.e. repairing mechanisms, were applied during stratification to compensate for the storage conditions and, as a result, seeds remained viable and seedlings were successfully established.

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Section: Oxidation Processes In Stored Seedsmentioning

confidence: 98%

Oxidation processes related to seed storage and seedling growth of Malus sylvestris, Prunus avium and Prunus padus

et al. 2020

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“…A gradual increase was observed for both hybrids when the seeds were exposed to PEG 6000 at -0.3 MPa. The high SOD activity proportionally increased the hydrogen peroxide content (H2O2) by dismutation of the superoxide radical, leading to greater activity of the antioxidant enzymes, such as catalase and ascorbate peroxidase (Silva, Dias, Sekita, & Finger, 2018). In this case, the result suggested the presence of the SOD activity but no difference between the hybrids with respect to the physiological quality of the seeds.…”

Section: Resultsmentioning

confidence: 85%

Osmolyte accumulation and antioxidant metabolism during germination of vigorous maize seeds subjected to water deficit

Prazeres¹,

Coelho²

2020

Acta Sci. Agron.

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The objective of this work was to evaluate the alterations of antioxidant enzyme reserves and antioxidant enzymes during germination under water deficit in maize hybrids and to associate with seed vigor, determining the mechanisms related to tolerance for this stress. Two three-way maize hybrids were characterized by their vigor at different levels of water deficit induced by polyethylene glycol 6000. Next, the seeds were hydrated at different osmotic potentials (0.0, -0.3, and -0.9 MPa) and removed at different times to assess the levels of the total soluble protein, total soluble sugars, proline, starch, and antioxidant enzymes, such as superoxide dismutase, catalase and ascorbate peroxidase. The analysis of variance, Tukey test at 5% and principal component analysis (PCA) were used. The vigorous hybrid (HT1) was more efficient than the low vigor hybrid seeds (HT2) in mobilizing the total soluble protein during the initial stages of germination and the total soluble sugars before and after root protrusion under water deficit in addition to increasing the catalase activity at the different osmotic potentials that were assessed.

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“…The "oxidative stress" model for seed deterioration suggests that deterioration is a result of the continued production of reactive oxygen species (ROS) such as superoxide (O 2 − ), hydrogen peroxide (H 2 O 2 ) and the hydroxyl radical (OH) [13,14]. These ROS damage many biomolecules and, in particular.…”

Section: Introductionmentioning

confidence: 99%

“…These ROS damage many biomolecules and, in particular. cause cellular dysfunction through lipid peroxidation [13,14]. Furthermore, when the moisture content of seeds rises above approximately (c.) 14%, for example during early stages of imbibition, lipid peroxidation also occurs through the activities of the enzyme lipoxygenase [15].…”

Section: Introductionmentioning

confidence: 99%

Influence of Cathodic Water Invigoration on the Emergence and Subsequent Growth of Controlled Deteriorated Pea and Pumpkin Seeds

Fatokun

Beckett

Varghese

et al. 2020

Plants

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The quality of seeds in gene banks gradually deteriorates during long-term storage, which is probably, at least in part, a result of the progressive development of oxidative stress. Here, we report a greenhouse study that was carried out to test whether a novel approach of seed invigoration using priming with cathodic water (cathodic portion of an electrolysed calcium magnesium solution) could improve seedling emergence and growth in two deteriorated crop seeds. Fresh seeds of Pisum sativum and Cucurbita pepo were subjected to controlled deterioration to 50% viability at 14% seed moisture content (fresh weight basis), 40 °C and 100% relative humidity. The deteriorated seeds were thereafter primed with cathodic water, calcium magnesium solution and deionized water. In addition, to study the mechanism of the impacts of invigoration, the effects of such priming on the lipid peroxidation products malondialdehyde (MDA) and 4-hydroxynonenal (4-HNE) and on the reactive oxygen species (ROS) scavenging enzymes superoxide dismutase and catalase were also determined in the fresh and deteriorated seeds. All priming treatments improved seed emergence parameters, subsequent seedling photosynthesis and growth relative to the unprimed seeds. In general, cathodic water was most effective at invigorating deteriorated seeds. Analysis of the lipid peroxidation products and antioxidant enzyme activities in invigorated seeds provided support for the hypothesis that the effectiveness of cathodic water in invigoration of debilitated orthodox seeds in general and of pea and pumpkin seeds in particular derive from its ability to act as an antioxidant.

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<b>Lipid peroxidation and antioxidant enzymes of <i>Jatropha curcas</i> L. seeds stored at different maturity stages

Cited by 27 publications

References 35 publications

Oxidation processes related to seed storage and seedling growth of Malus sylvestris, Prunus avium and Prunus padus

Oxidation processes related to seed storage and seedling growth of Malus sylvestris, Prunus avium and Prunus padus

Osmolyte accumulation and antioxidant metabolism during germination of vigorous maize seeds subjected to water deficit

Influence of Cathodic Water Invigoration on the Emergence and Subsequent Growth of Controlled Deteriorated Pea and Pumpkin Seeds

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