scholarly journals Smoke-water, karrikinolide and gibberellic acid stimulate growth in bean and maize seedlings by efficient starch mobilization and suppression of oxidative stress

2016 ◽  
Vol 102 ◽  
pp. 4-11 ◽  
Author(s):  
T.O. Sunmonu ◽  
M.G. Kulkarni ◽  
J. Van Staden
Keyword(s):  
Oxidative Stress ◽  
Gibberellic Acid ◽  
Maize Seedlings ◽  
Starch Mobilization ◽  
Smoke Water

scholarly journals Effect of chilling and acclimation on the activity of glutamine synthetase isoforms in maize seedlings

2007 ◽  
Vol 59 (3) ◽  
pp. 177-185 ◽  
Author(s):  
Ana Simonovic ◽  
M.D. Anderson
Keyword(s):  
Oxidative Stress ◽  
Glutamine Synthetase ◽  
Synthetase Activity ◽  
Glutamine Synthetase Activity ◽  
Maize Seedlings ◽  
Oxidative Inactivation ◽  
Etiolated Plants

Effects of chilling and acclimation on the activity of cytosolic (GS1) and plastidic (GS2) isoforms of glutamine synthetase (E.C. 6.3.1.2) were studied in chilling-sensitive and acclimation-responsive maize inbred G50. Glutamine synthetase activity in mesocotyls and roots of chilled (7 d/4?C) and rewarmed (1 d/27?C) etiolated plants was "1/3 that of controls. In coleoptiles+leaves of light-grown plants, GS1 was reduced to 75%, and GS2 to 50%. Acclimation (3 d/14?C) increased GS activity and alleviated the effects of chilling. Exposure to H2O2 or menadione also reduced GS activity. Since chilling causes oxidative stress in maize, acclimation probably preserves GS activity by protecting GS from oxidative inactivation. .

Biochemical markers of oxidative stress in maize seedlings exposed to rose-grass aphids

2021 ◽  
Vol 53 (1) ◽  
pp. 23-34
Author(s):  
I. Łukasik ◽  
S. Goławska
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Superoxide Anion ◽  
Biochemical Markers ◽  
Carbonyl Groups ◽  
Maize Seedlings ◽  
Aphid Infestation ◽  
Markers Of Oxidative Stress ◽  
Aphid Feeding ◽  
Superoxide Anion Radicals

We studied the influence of rose-grass aphid (Metopolophium dirhodum L.) infestation on the biochemical markers of oxidative stress in seedlings of two maize (Zea mays L.) varieties (relatively resistant Ambrozja and resistant Plomyk). We compared the generation of superoxide anion radicals O2-, level of hydrogen peroxide (H2O2), lipid peroxidation products (MDA) as well as markers of protein damage (protein-bound carbonyl groups). The studied parameters were measured at 24, 48, 72 and 96 h post-initial aphid infestation compared to the non-infested control seedlings. Our studies indicated that the rose-grass aphid feeding evoked oxidative stress in the maize seedlings. Investigated Z. mays cultivars exhibited excessive generation of superoxide anion radicals in response to insect treatments. Rose-grass aphid feeding increased the H2O2 level in maize tissues with similar levels observed at most periods post-infestation with M. dirhodum, also increased lipid peroxidation products with the maximal levels at 48 and 72 h for Ambrozja and 48, 72 and 96 h post-infestation for Plomyk varieties. Further at 48 and 72 h post-initial aphid infestation, there was an increase in protein bound carbonyl groups content in the maize seedlings after infestation with aphids.

scholarly journals Physiochemical Studies of Sodium Chloride on Mungbean (Vigna radiataL. Wilczek) and Its Possible Recovery with Spermine and Gibberellic Acid

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Srijita Ghosh ◽  
Sanglap Mitra ◽  
Atreyee Paul
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Enzymes ◽  
Gibberellic Acid ◽  
Chlorophyll Content ◽  
Biomass Production ◽  
Oxidative Stress Marker ◽  
Antioxidant Enzyme Activities ◽  
Oxidative Stress Markers ◽  
Stress Markers ◽  
Low Concentrations

The physiological and biochemical responses to increasing NaCl concentrations, along with low concentrations of gibberellic acid or spermine, either alone or in their combination, were studied in mungbean seedlings. In the test seedlings, the root-shoot elongation, biomass production, and the chlorophyll content were significantly decreased with increasing NaCl concentrations. Salt toxicity severely affected activities of different antioxidant enzymes and oxidative stress markers. Activities of antioxidant enzymes, superoxide dismutase (SOD), and catalase (CAT) increased significantly over water control. Similarly, oxidative stress markers such as proline, malondialdehyde (MDA), and hydrogen peroxide (H2O2) contents also increased as a result of progressive increase in salt stress. Combined application of NaCl along with low concentrations of either gibberellic acid (5 µM) or spermine (50 µM) in the test seedlings showed significant alterations, that is, drastic increase in seedling elongation, increased biomass production, increased chlorophyll content, and significant lowering in all the antioxidant enzyme activities as well as oxidative stress marker contents in comparison to salt treated test seedlings, leading to better growth and metabolism. Our study shows that low concentrations of either gibberellic acid or spermine will be able to overcome the toxic effects of NaCl stress in mungbean seedlings.

Oxidative stress induced by gibberellic acid in bone of suckling rats

2011 ◽  
Vol 74 (4) ◽  
pp. 643-649 ◽  
Author(s):  
Afef Troudi ◽  
Ibtissem Ben Amara ◽  
Nejla Soudani ◽  
Hanen Bouaziz ◽  
Tahia Boudawara ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Gibberellic Acid ◽  
Suckling Rats

scholarly journals GIBBERELLIC ACID PRIMING ENHANCES MAIZE SEED GERMINATION UNDER LOW WATER POTENTIAL

2021 ◽  
Vol 22 (1) ◽  
pp. 17
Author(s):  
Amit Gnawali ◽  
Roshan Subedi
Keyword(s):  
Gibberellic Acid ◽  
Water Potential ◽  
Low Cost ◽  
Shoot Length ◽  
Maize Seedlings ◽  
Germination Time ◽  
Stressful Environment ◽  
Mean Germination Time ◽  
Low Water Potential ◽  
Germination Parameters

<p class="abstrakinggris"><span lang="EN-US">Germination is a portentous yield determining factor that is a challenge in the low water potential environment due to disrupted imbibition. Hormonal seed priming can markedly increase the germination on maize even in such a stressful environment. Therefore, research was aimed to analyze the application of gibberellic acid (GA<sub>3</sub>) priming to maize seeds to minimize the deleterious effects of reduced water potential. GA<sub>3</sub> priming was done at 0, 50, 100, 150, and 200 ppm for 12 hours and subjected to drought levels of 0, 0.15, 0.50, 1.05, and 1.75 MPa by using NaCl solution. Different germination parameters, i.e., germination percentage, mean germination time, germination index, relative water content, seedling vigor index, root length, and shoot length, were determined on the final day of the experiment. The results showed that all germination parameters were adversely influenced by low water potential. Every level of GA<sub>3</sub> priming has hastened all parameters. GA<sub>3</sub> priming at 100 ppm decreased the mean germination time by 35 hours under 1.75 MPa compared to non-primed seeds. GA<sub>3</sub> priming increased the shoot length of maize seedlings with a shoot length of 2.9 cm in non-primed seedlings compared to 6.4 cm in 200 ppm GA<sub>3</sub> priming under 1.05 MPa. GA<sub>3</sub> priming is the best method for the early establishment of maize seedlings in low water potential conditions. As a result, it may be utilized as a low-cost and straightforward approach for establishing maize crops under saline and drought conditions.</span></p>

scholarly journals Different salicylic and jasmonic acids imbalances are involved in the oxidative stress-mediated cell death, induced by fumonisin B1 in maize seedlings with contrasting resistance to Fusarium verticillioides ear rot in the field

2019 ◽  
Author(s):  
Santiago N. Otaiza-González ◽  
Verónica S. Mary ◽  
Silvina L. Arias ◽  
Lidwina Bertrand ◽  
Pilar A. Velez ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Cell Death ◽  
Fusarium Verticillioides ◽  
Plant Secondary Metabolites ◽  
Fumonisin B1 ◽  
Ear Rot ◽  
Maize Seedlings ◽  
Oxidative Stress Biomarkers ◽  
Aerial Parts ◽  
Biomarker Response

ABSTRACTBackground and aimFungal and plant secondary metabolites modulate the plant-pathogen interactions. However, the participation of fumonisins in the Fusarium verticillioides-maize pathosystem is unclear. In this work was studied the cell death, and the reactive oxygen species (ROS) - phytohormone imbalance interplay underlying the phytotoxicity of fumonisin B1 (FB1) in maize germplasms with contrasting resistance to Fusarium ear rot in the field.MethodsResistant (RH) and susceptible hybrid (SH) maize seedlings, grown from uninoculated seeds irrigated with FB1 (1 and 20 ppm), were harvested at 7, 14 and 21 days after planting, and were examined for electrolyte leakage (aerial parts); and for oxidative stress biomarkers (aerial parts and roots). The phytohormone (salicylic and jasmonic acids) imbalance interplay underlying the FB1-induced cell death were further explored in seedlings exposed 24 h to the mycotoxin (1 ppm) in hydroponics.ResultsCell death increased in RH and SH watered with 1 and 20 ppm of mycotoxin, respectively. Both toxin concentrations were pro-oxidant, and the major perturbations were found in roots. An Integrated Biomarker Response index was calculated suggesting that phytotoxicity occurs in a redox context more efficiently controlled by RH.ConclusionThe pre-treatment with the antioxidant ascorbic acid led to the conclusion that cell death in RH was related to a salicylic acid increase mediated by ROS. Nevertheless, FB1 induced two different phytohormonal regulatory mechanisms mediated by oxidative stress in both maize hybrids.

Changes based on oxidative stress in metolachlor and atrazine treated maize seedlings

2018 ◽  
Vol 51 (2) ◽  
Author(s):  
Songul Canakci-Gulengul ◽  
Oguz Ayhan Kirecci ◽  
Fadime Karabulut
Keyword(s):  
Oxidative Stress ◽  
Maize Seedlings
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