scholarly journals Effects of gibberellic acid on water uptake and germination of sweet sorghum seeds under salinity stress

2019 ◽  
Vol 79 (3) ◽  
pp. 415-424 ◽  
Author(s):  
Guanglong Zhu ◽  
Linlin An ◽  
Xiurong Jiao ◽  
Xubing Chen ◽  
Guisheng Zhou ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Water Uptake ◽  
Salinity Stress ◽  
Sweet Sorghum

Comparison of Spring Maize Root Water Uptake Models Under Water and Salinity Stress Validated with Field Experiment Data

2015 ◽  
Vol 64 (5) ◽  
pp. 669-682 ◽  
Author(s):  
Qingming Wang ◽  
Zailin Huo ◽  
Shaoyuan Feng ◽  
Chengfu Yuan ◽  
Jianhua Wang
Keyword(s):  
Field Experiment ◽  
Water Uptake ◽  
Salinity Stress ◽  
Root Water Uptake ◽  
Maize Root ◽  
Experiment Data ◽  
Spring Maize

scholarly journals Effect Of Priming Of Seeds Of Medicago Sativa ‘Bami’ With Gibberellic Acid On Germination, Seedlings Growth And Antioxidant Enzymes Activity Under Salinity Stress

2014 ◽  
Vol 22 (2) ◽  
pp. 167-174 ◽  
Author(s):  
Omid Younesi ◽  
Ali Moradi
Keyword(s):  
Antioxidant Enzymes ◽  
Gibberellic Acid ◽  
Salinity Stress ◽  
Reductase Activity ◽  
Membrane Damage ◽  
Dry Weight ◽  
Guaiacol Peroxidase ◽  
Enzymes Activity ◽  
Mda Content ◽  
Glutathione Reductase Activity

AbstractThe experiment was conducted in order to study effects of seeds priming with gibberellic acid (GA3) at 0, 3, 5 and 8 mM on germination, growth and antioxidant enzymes activity in alfalfa seedlings under salinity stress (200 mM NaCl). All control seeds germinated. The rate of germinated seeds was reduced to 48% in the presence of NaCl, and increased to 76% after seeds priming with 5 mM GA3. Priming with 5 mM GA3 was also correlated with an increase of dry weight of seedlings derived from both stressed and non-stressed seeds as well as with the reduction of electrolyte leakage (EL) and malondialdehyde (MDA) level in salt stressed seedlings. The activity of superoxide dismutase, catalase, guaiacol peroxidase and ascorbate peroxidase in primed and non-primed seeds increased in the presence of NaCl and after priming of seeds with 5 mM GA3, whereas only small effect on glutathione reductase activity in both primed and non-primed seeds was observed. The total ascorbate level was higher in both stressed and non-stressed seedlings from primed seeds. These results suggest that GA3 priming might increase the salt tolerance of alfalfa seedlings through enhancing the activities of antioxidant enzymes and reducing the membrane damage as estimated using biomarkers, EL index and MDA content.

scholarly journals Effects of gibberellic acid and storage temperature on the germination of hawthorn seeds

2017 ◽  
Vol 63 (No. 9) ◽  
pp. 417-424 ◽  
Author(s):  
Ahmadloo Fatemeh ◽  
Kouchaksaraei Masoud Tabari ◽  
Goodarzi Gholam Reza ◽  
Salehi Azadeh
Keyword(s):  
Electrical Conductivity ◽  
Gibberellic Acid ◽  
Water Uptake ◽  
Temperature Regime ◽  
Storage Temperature ◽  
Fresh Weight ◽  
Freeze Thaw ◽  
Refrigerator Temperature ◽  
And Storage ◽  
Storage Temperatures

This study investigated methods to overcome seed dormancy in Crataegus pseudoheterophylla Pojarkova seeds. Seeds with and without endocarps were treated with gibberellic acid (GA<sub>3</sub>) at different concentrations and four storage temperatures. Then they were stratified in an alternate temperature regime. The amount of absorbed water in seeds with endocarps was monitored by measuring the fresh weight of seeds for 0, 24, 48, 72, and 96 h of imbibition. The electrical conductivity (EC) and the percentage of water uptake by seeds stored for 12 months at laboratory temperature, in a refrigerator, in a freezer, and in freeze-thaw conditions were measured. The highest germination (59.7%) was recorded in seeds without endocarps treated with 3,000 mg·l<sup>–1</sup> GA<sub>3 </sub>and stored either in a laboratory or a refrigerator (32.7–35.3%). All treatments of seeds without endocarps where GA<sub>3</sub> was applied showed statistically higher percentages of germination than the control. Seeds with endocarps stored at refrigerator temperature imbibed water up to 44.3% with increasing imbibition periods, whereas the amount of seeds that absorbed water in freezer and freeze-thaw conditions was almost the same. The tests showed the highest EC during storage in the freezer, with the lowest water uptake and viability in seeds stored during the freeze-thaw process.

Physiological and transcriptional evaluation of sweet sorghum seedlings in response to single and combined drought and salinity stress

2022 ◽  
Vol 146 ◽  
pp. 459-471
Author(s):  
Zhiheng Wang ◽  
Yuqing Wei ◽  
Yanrong Zhao ◽  
Yuejuan Wang ◽  
Fang Zou ◽  
...  
Keyword(s):  
Salinity Stress ◽  
Sweet Sorghum

scholarly journals Effect of gibberellic acid, stratification and salinity on seed germination of Echinacea purpurea cv. Magnus

2015 ◽  
Vol 61 (3) ◽  
pp. 13-22 ◽  
Author(s):  
Shamila Yadolahi Zadeh ◽  
Ali Akbar Ramin ◽  
Bahram Baninasab
Keyword(s):  
Seed Germination ◽  
Gibberellic Acid ◽  
Salinity Stress ◽  
Echinacea Purpurea ◽  
Purple Coneflower ◽  
Randomized Design ◽  
Salinity Levels ◽  
The Mean ◽  
Completely Randomized Design ◽  
Mean Time

SummaryThis study was conducted in order to determine the appropriate treatment for breaking dormancy and the effect of salinity on seed germination of purple coneflower (Echinacea purpureacv. Magnus), in two separate experiments. In the first experiment, five levels of gibberellic acid (GA3) (0, 250, 500, 1000, and 1500 mg×L−1) with four levels of cold moist stratification period of seeds at 5°C (0, 5, 10 and 15 days) were launched. A factorial experiment was conducted in a completely randomized design with four replications. The statistical analysis showed that concentration of 250 mg×L−1GA3with 10 days of cold moist chilling significantly increased the percentage of germination of normal seedlings and reduced the mean time of germination. In the second experiment, the seeds were chilled for 10 days at 5°C and half of them treated with 250 mg×L−1GA3for 24 hours. The seeds treated with GA3, and those non-treated were subjected to NaCl for salinity stress. The experiment was conducted using five salinity levels (0, 20, 40, 60 and 80 mM NaCl) in four replications in a completely randomized design. The results showed that purple coneflower is highly sensitive to salinity in the germination stage. The results also showed that by increasing salinity levels, the percentage of germination and normal seedlings significantly decreased and the mean time to germination increased, compared to the control treatment. But the seeds treated with GA3showed higher viability and better performance under salinity stress condition.

scholarly journals Behavior of some Hungarian wheat varieties to seed soaking in gibberellic acid under salt stress

2017 ◽  
pp. 7-17 ◽  
Author(s):  
W. A. E. Abido ◽  
László Zsombik
Keyword(s):  
Seed Germination ◽  
Chemical Analysis ◽  
Gibberellic Acid ◽  
Salinity Stress ◽  
Block Design ◽  
Wheat Varieties ◽  
Seed Soaking ◽  
Germination Characteristics ◽  
Randomized Complete Block Design ◽  
Four Levels

Various abiotic stresses including high salinity strongly affect seed germination. Three Hungarian wheat landraces Gamási, Fóti and Kartali have been tested for seed germination, seedling growth and chemicals parameters when seeds were soaked in gibberellic acid (GA3) at the concentrations of 0, 75 and 150 ppm and at four levels of salinity stress 0, 5, 10 and 15 dSm-1. A laboratory experiment took place at Research Institute of Nyíregyháza. Factorial Experiment based on Randomized Complete Block Design (RCBD) in four replications has been conducted. Seed soaking in GA3 before sowing significantly affected germination characteristics, seedling properties and the results of chemical analysis. The highest germination as well as K+ content of seeds were observed at seed soaking into 150 ppm GA3. However, Na+ and proline contents in seedling were decreased. The behavior of the tested Hungarian wheat varieties was genotype-dependent. Increasing salinity stress up to 15 dSm-1 significantly affected germination characteristics, seedlings parameters and chemical analysis. Fóti variety turned out to be the best at 150 ppm GA3 compared to the other two varieties. Moreover, it had the lowest Na+ and proline contents and highest K+ content.

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