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.

Effects of drought stress on the water relations in Brassica species

1993 ◽  
Vol 73 (2) ◽  
pp. 525-529 ◽  
Author(s):  
Allen G. Good ◽  
James L. Maclagan
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Osmotic Potential ◽  
Relative Water Content ◽  
Physiological Responses ◽  
Brassica Species ◽  
Leaf Osmotic Potential ◽  
Drought Conditions ◽  
Relative Water ◽  
Effects Of Drought

The physiological responses of different species of Brassica to induced drought stress were studied by analysing the relationships between relative water content, leaf water potential and leaf osmotic potential during the onset of drought stress. These data indicate that while there was a decrease in leaf osmotic potential with the onset of drought stress, this did not result from a net increase in solutes. Therefore, these genotypes of Brassica do not appear able to osmoregulate under these drought conditions. Key words: Brassica, drought, osmoregulation, water stress

scholarly journals Selenium Alleviates the Adverse Effect of Drought in Oilseed Crops Camelina (Camelina sativa L.) and Canola (Brassica napus L.)

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1699
Author(s):  
Zahoor Ahmad ◽  
Shazia Anjum ◽  
Milan Skalicky ◽  
Ejaz Ahmad Waraich ◽  
Rana Muhammad Sabir Tariq ◽  
...  
Keyword(s):  
Drought Stress ◽  
Adverse Effects ◽  
Yield Components ◽  
Foliar Application ◽  
Foliar Spray ◽  
Seed Priming ◽  
Brassica Napus L ◽  
Yield Attributes ◽  
Oilseed Crops ◽  
Effects Of Drought

Drought poses a serious threat to oilseed crops by lowering yield and crop failures under prolonged spells. A multi-year field investigation was conducted to enhance the drought tolerance in four genotypes of Camelina and canola by selenium (Se) application. The principal aim of the research was to optimize the crop yield by eliciting the physio-biochemical attributes by alleviating the adverse effects of drought stress. Both crops were cultivated under control (normal irrigation) and drought stress (skipping irrigation at stages i.e., vegetative and reproductive) conditions. Four different treatments of Se viz., seed priming with Se (75 μM), foliar application of Se (7.06 μM), foliar application of Se + Seed priming with Se (7.06 μM and 75 μM, respectively) and control (without Se), were implemented at the vegetative and reproductive stages of both crops. Sodium selenite (Na2SeO3), an inorganic compound was used as Se sources for both seed priming and foliar application. Data regarding physiochemical, antioxidants, and yield components were recorded as response variables at crop maturity. Results indicated that WP, OP, TP, proline, TSS, TFAA, TPr, TS, total chlorophyll contents, osmoprotectant (GB, anthocyanin, TPC, and flavonoids), antioxidants (APX, SOD, POD, and CAT), and yield components (number of branches per plant, thousand seed weight, seed, and biological yields were significantly improved by foliar Se + priming Se in both crops under drought stress. Moreover, this treatment was also helpful in boosting yield attributes under irrigated (non-stress) conditions. Camelina genotypes responded better to Se application as seed priming and foliar spray than canola for both years. It has concluded that Se application (either foliar or priming) can potentially alleviate adverse effects of drought stress in camelina and canola by eliciting various physio-biochemicals attributes under drought stress. Furthermore, Se application was also helpful for crop health under irrigated condition.

scholarly journals β-Aminobutyric Acid Raises Salt Tolerance and Reorganises Some Physiological Characters in Calendula officinalis L. Plant

2019 ◽  
pp. 1-16 ◽  
Author(s):  
E. F. Ali ◽  
F. A. S. Hassan
Keyword(s):  
Salt Stress ◽  
Stomatal Conductance ◽  
Seed Priming ◽  
Aminobutyric Acid ◽  
Total Phenolic ◽  
Calendula Officinalis ◽  
Stress Treatment ◽  
Pot Marigold ◽  
Calendula Officinalis L ◽  
Growth Characters

Salt stress is one of the main factors limiting plant growth and yield globally. Seed priming technique with different chemicals including β-aminobutyric acid (BABA) is found to be effective in enhancing plant growth and development under biotic and abiotic stresses. Scarce reports have been found about BABA seed priming in medicinal plants under stress conditions; however, several studies have been conducted on other crops but have not made an in-depth study to investigate biochemical and physiological changes. In current study the shoot growth, relative water content (RWC), chlorophyll content, stomatal conductance, nutrient content (N, P, K, Na and Cl), proline, malondialdehyde (MDA), hydrogen peroxide (H2O2) content, antioxidants enzymes (CAT, SOD and POD), membrane stability index (MSI), total phenolic and flavonoids contents lipid peroxidation and membrane permeability were investigated in Calendula officinalis L. leaves due to BABA seed priming and/or salt stress treatment. Salt stress treatment significantly reduced the growth characters, inflorescence number as well as its fresh and dry weights, N, P and K contents in leaves, RWC, chlorophyll content, stomatal conductance, MSI and total phenolic and flavonoids contents of pot marigold. However, proline content, MDA accumulation, H2O2 content and antioxidant enzyme activity (CAT, SOD and POD) were increased due to salt stress. On the other hand, seed priming with BABA significantly improved the growth characters, inflorescence attributes and the previously mentioned physiological and biochemical parameters investigated relative to the control. Applying seed priming under salt stress conditions significantly mitigated the negative effects of salinity and enhanced the growth and productivity of pot marigold and therefore was suggested to be an effective technique prior to cultivation.

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