scholarly journals Effect of Seed Priming with Nanosilicon on Morpho-Physiological Characterestics, Quercetin Content and Antioxidant Capacity in Calendula officinalis L. under Drought Stress Conditions

2020 ◽  
Vol 4 (72) ◽  
pp. 186-203
Author(s):  
Saeedeh Rahimi ◽  
Mehrnaz Hatami ◽  
Mansour Ghorbanpour ◽  
◽  
◽  
...  
Keyword(s):  
Drought Stress ◽  
Antioxidant Capacity ◽  
Seed Priming ◽  
Stress Conditions ◽  
Calendula Officinalis ◽  
Calendula Officinalis L

scholarly journals Seed priming with selenium improves growth, water relation and antioxidant activity of pot marigold (Calendula officinalis L.) under drought conditions

2021 ◽  
Vol 20 (1) ◽  
pp. 27-36
Author(s):  
Hassan Bayat ◽  
Mohammad Hossein Aminifard
Keyword(s):  
Antioxidant Activity ◽  
Water Stress ◽  
Drought Stress ◽  
Adverse Effects ◽  
Seed Priming ◽  
Calendula Officinalis ◽  
Drought Conditions ◽  
Effects Of Drought ◽  
Pot Marigold ◽  
Calendula Officinalis L

Selenium (Se) seed priming is an effective method for enhancing seed performance and improving tolerance of crops to abiotic stresses particularly drought. A pot experiment was conducted to determine the effect of seed priming of pot marigold (Calendula officinalis L.) with Se on growth, physiology and antioxidant activity grown under both control and drought stress conditions. Treatments included 6 levels of seed priming with Se (0 (control), 0.5, 1, 1.5, 2 and 4 mg. L–1) and 2 levels of water stress (well-watered and drought conditions). The results showed that supplemental Se at lower concentrations improved growth parameters like total leaf area, root length and total biomass of control and drought-stressed plants. In addition, relative water content and chlorophyll content of the drought-stressed plants increased with the application of Se at lower concentrations. Treatment with Se mitigated adverse effects of drought stress through enhancement of photosynthetic pigments, improvement of water relations, accumulation of soluble sugars and increased antioxidant activity. Seed priming with Se also increased total phenols, flavonoids and free radical scavenging activity of pot marigold plants both under well-watered and water stress conditions. It was found that seed priming with Se at lower concentrations (especially 1.5 mg. L–1) can mitigate the adverse effects of drought stress and improved antioxidant system of pot marigold plants.

scholarly journals Stress tolerance of Xerocomus badius and its promotion effect on seed germination and seedling growth of annual ryegrass under salt and drought stresses

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Binghua Liu ◽  
Xinghong Liu ◽  
Fangchun Liu ◽  
Hailin Ma ◽  
Bingyao Ma ◽  
...  
Keyword(s):  
Salt Stress ◽  
Drought Stress ◽  
Seed Germination ◽  
Seedling Growth ◽  
Mycelial Growth ◽  
Seed Priming ◽  
Stress Conditions ◽  
Mild Stress ◽  
Annual Ryegrass ◽  
Salt And Drought Stresses

AbstractComparative evaluations were conducted to assess the effects of different pH levels, NaCl-induced salt stress, and PEG-induced drought stress on the mycelial growth of Xerocomus badius. The results showed that X. badius mycelium grew well at a wide pH range of 5.00 ~ 9.00. Although the mycelium remained viable, mycelial growth of X. badius was significantly inhibited with increasing salt and drought stresses. Furthermore, a soilless experiment in Petri dishes was performed to investigate the potential of X. badius to induce beneficial effects on seed germination and seedling growth of annual ryegrass (Lolium multiflorum Lam.) under salt and drought stresses. Seed priming with X. badius enhanced the seedling growth of L. multiflorum Lam. under NaCl-induced salt stress and PEG-induced drought stress. However, X. badius did not significantly improve the seed germination under non-stress and mild stress conditions. It suggested that X. badius inoculation with seeds was not essential for seed germination under non-stress and mild stress conditions, but contributed highly to seedling growth under severe stress conditions. Therefore, seed priming with X. badius on ryegrass could be an effective approach to enhance plant tolerance against drought and salt stresses. X. badius could be a good candidate for the inoculation of ectomycorrhizal plants cultivation programs in mild saline and semiarid areas.

scholarly journals The Effect of Priming on Germination Characteristics of Barley Seeds under Drought Stress Conditions

2020 ◽  
Vol 53 (1) ◽  
pp. 1-18
Author(s):  
S A TABATABAEI ◽  
O ANSARI
Keyword(s):  
Drought Stress ◽  
Seed Priming ◽  
Germination Percentage ◽  
Stress Conditions ◽  
Combined Treatments ◽  
Vigor Index ◽  
Germination Characteristics ◽  
Subsequent Exposure ◽  
Coefficient Of Velocity ◽  
C 50

Seed priming methods have been used to increase germination and seedling establishment under different abiotic stress conditions. Seed priming was used in barley to increase seed germination and tolerance on stress exposure. Barley seeds were treated with various priming agents for different time and temperatures. The effect of priming was assessed on germination characteristics on subsequent exposure to drought (PEG-12 bar) stress for 7 days. Seed priming treatments significantly (p≤ 0.01) affected germination percentage (GP), normality seedling percentage (NSP), germination Index (GI), germination uniformity (GU), means time to germination (MTG), coefficient of velocity of germination (CVG), seedling vigor index (SVI) and coefficient of allometry (AC). Seed priming with gibberelic acid (GA), salicylic acid (SA), ascorbic acid (ASc), hydropriming (HP), osmopriming (OP) and combined treatments (CT) significantly (p≤ 0.01) increased germination characteristics, compared to the unprimed. Seed priming with concentrations 25, 50 ppm of GA for 15 h at 10°C, 25 ppm of SA for 12 h at 10°C, 50 ppm of ASc for 12 h at 15°C, treatment 16 h hydropriming at 10°C and -15 bar PEG for 24 h for osmopriming may be considered as optimal treatment for priming of barley seeds in drought stress conditions. In some cases, combined treatments are better than the separate treatments. Seed priming with PEG (potential -l5 bar PEG for 24 h at 10°C) was more effective in drought stress than the other treatments.

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