Physiological and antioxidant changes in sunflower seeds under water restriction

Morais, Thaís de Castro; Pinheiro, Daniel Teixeira; Martínez, Paola Andrea Hormaza; Finger, Fernando Luíz; Dias, Denise Cunha Fernandes dos Santos

doi:10.1590/2317-1545v42225777

Cited by 2 publications

(2 citation statements)

References 40 publications

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“…In oilseed rape (Brassica napus), artificial aging of seeds caused a reduction of vigor, associated with low DNA synthesis and significant change in the activity of antioxidant enzymes such as SOD and APX (BONIECKA et al, 2019). As observed here, sunflower seeds from the same lots used in this study, but underwater restriction, showed an increase in the activity of POX and APX enzymes over the germination time (MORAIS et al, 2020).…”

Section: Resultssupporting

confidence: 64%

Physiological Quality and Antioxidant Enzymatic Action in Sunflower Seeds Exposed to Deterioration1

et al. 2021

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This work aimed to evaluate the physiological and biochemical changes resulting from controlled deterioration in different lots of sunflower seeds. Two sunflower seed lots of the cultivar Hélio 253 were subjected to simulated deterioration, using the accelerated aging test methodology (41 °C and 100% RH) for 0, 48, 72, and 96 h. Then, the seeds were subjected to the tests of germination, first germination count, seedling length and dry matter, emergence, accelerated aging, electrical conductivity, and total seedling length. The antioxidant activity was evaluated through the enzymes superoxide dismutase (SOD), ascorbate peroxidase (APX), and peroxidase (POX) at 0, 2, 4, and 6 days after sowing. Deterioration caused a reduction in the germination and vigor of the seeds, mainly in the lot with lower initial vigor and for the longest exposure times (72 and 96 h). For both lots, reductions in SOD activity and increases in POX and APX were observed during seed germination, mainly after 48 h of exposure to aging deterioration. Peroxidase enzymes are activated in deteriorated and non-deteriorated sunflower seeds, mainly after two days of germination.

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Section: Resultssupporting

confidence: 64%

Physiological Quality and Antioxidant Enzymatic Action in Sunflower Seeds Exposed to Deterioration1

et al. 2021

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“…The neutralization of excess ROS at the cellular level occurs mainly through the action of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), peroxidase (POX), and others (Kapoor et al, 2019). The performance of these and other antioxidant enzymes in seeds exposed to water deficit is essential for mitigating oxidative stress in species such as rice (Liu et al, 2019), cotton (Bai et al, 2020), sunflower (Morais et al, 2020) and others.…”

Section: Introductionmentioning

confidence: 99%

Nitric oxide in physiological potential and biochemical mechanisms of pea seeds under water deficit

et al. 2022

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Nitric oxide (NO) has been standing out as a seed germination process stimulator, mainly under stress conditions. This work aimed to evaluate the physiological and biochemical effects of NO on germination and vigor of pea seeds submitted to water deficit. Seeds of cv. Itapuã 600 were sown in moistened substrate with water (control), PEG 6000 solution (-0.15 MPa) and PEG 6000 solution with sodium nitroprusside (SNP) (-0.15 MPa + 50 μM), an NO donor. The germination, vigor (germination speed and seedling development), activity of antioxidant enzymes, reactive oxygen species, lipid peroxidation, and amylase activity were evaluated. Germination and vigor of pea seeds were reduced under water deficit, but the application of SNP was able to improve the physiological and biochemical performance of the seeds under this condition. Water deficit promotes an increase in oxidative stress, but the application of NO promotes greater activity of antioxidative apparatus enzymes and amylases, softening the damage caused by water deficit during seed germination and growth of pea seedlings.

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Physiological and antioxidant changes in sunflower seeds under water restriction

Cited by 2 publications

References 40 publications

Physiological Quality and Antioxidant Enzymatic Action in Sunflower Seeds Exposed to Deterioration1

Physiological Quality and Antioxidant Enzymatic Action in Sunflower Seeds Exposed to Deterioration1

Nitric oxide in physiological potential and biochemical mechanisms of pea seeds under water deficit

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