Effect of salicylic acid and sodium nitroprusside on growth parameters, photosynthetic pigments and secondary metabolites of safflower under drought stress

2020 ◽  
Vol 259 ◽  
pp. 108823 ◽  
Author(s):  
Maryam Chavoushi ◽  
Farzaneh Najafi ◽  
Azam Salimi ◽  
Seyed Abdolhamid Angaji
Keyword(s):  
Salicylic Acid ◽  
Drought Stress ◽  
Secondary Metabolites ◽  
Sodium Nitroprusside ◽  
Photosynthetic Pigments ◽  
Growth Parameters

scholarly journals Morpho-Physiological Responses of Abelmoschus esculentus (L.) Moench to Arbuscular Mycorrhizal Fungi Inoculation under Drought Stress

2019 ◽  
pp. 1-8
Author(s):  
Okon, Okon Godwin ◽  
Uyon, Peter Paul ◽  
Nyahette, Enobong Monday
Keyword(s):  
Drought Stress ◽  
Arbuscular Mycorrhizal Fungi ◽  
Photosynthetic Pigments ◽  
Mycorrhizal Fungi ◽  
Biomass Yield ◽  
Plant Biomass ◽  
Growth Parameters ◽  
Arbuscular Mycorrhizal ◽  
Experimental Plant ◽  
Experimental Soil

Aims: To assess the potential impacts of arbuscular mycorrhizal fungi (AMF) (G. geosporum) inoculation on the survival of A. esculentus under drought stress. Study Design: This experiment was set up in a completely randomized design (CRD) with all treatments replicated thrice. This gave a total of 7 treatments, 21 replicates. Place and Duration of Study: The experimental soil used for this study was collected from the Botanical Garden of the Department of Biological Sciences, Ritman University (Latitude 5º11’44ºN and Longitude 7º42’12ºE), Akwa Ibom State, Nigeria. All analysis was carried out in Soil Science Laboratory and Botany Laboratory, Akwa Ibom State University, between January and march 2019. Methodology: Soil samples were analyzed following the standard procedures outlined for wet acid digestions. Growth parameters were determined using standard methods. At Leaf chlorophyll meter was employed in the assessment of the photosynthetic pigments of the experimental plant. Biomass yield were calculated using standard formulas. Results: The physicochemical analysis of the experimental soil used in this study revealed the physical and chemical properties of the soil; pH (6.12), EC (0.06dS/m), organic matter (2.90%), Av. P (44.62 mg/kg) and textural class of the soil was described as loamy sandy soil. Shoot length, petiole length, internode length, number of leaves and leaf area as well as the total photosynthetic pigments (TPP) contents of A. esculentus were significantly (P =.05) reduced (from 38.77±3.01 mg/kg to 29.83±1.89 mg/kg) by drought stress. There was also significantly (P = .05) reduction in N, P, K, Ca and Mg composition of A. esculentus as well as its biomass yield. However, the inoculation of A. esculentus roots with AMF (G. geosporum) in this study through several morphological and physiological processes exhibited remarkable improvement in growth morphology, total photosynthetic pigments, macronutrients composition as well as biomass yield. Conclusion: The results of this work have shown that AMF can enhance the ability of A. esculentus to resist drought stress possibly through some morphological and physiological changes which improves water and nutrients uptake.

scholarly journals Interactive Effects of Brassinosteroids and Timber Waste Biochar Enhances the Drought Tolerance Capacity of Wheat Plant

2021 ◽  
Author(s):  
Irfana Lalarukh ◽  
Zunaira Naeem ◽  
Nida Mansoora ◽  
Syeda Amjad Amjad ◽  
Shams Abdel-Hafez ◽  
...  
Keyword(s):  
Drought Stress ◽  
Photosynthetic Pigments ◽  
Foliar Application ◽  
Growth Parameters ◽  
Wheat Plant ◽  
Interactive Effects ◽  
Control Treatment ◽  
Enzymatic Antioxidants ◽  
Stress Indicators ◽  
Randomized Design

Abstract Drought stress is among the major constraints that threat agricultural productivity within the arid and semi-arid regions, worldwide. In this study, wheat (a strategic crop) was selected to test its growth under drought stress and the mechanisms beyond this adaptation while considering two factors, i.e., (1) deficit irrigation at 35% of the water holding capacity (WHC) versus 75% of WHC (Factor A) and (2) the following safe treatments: the control treatment (C), amending soil with biochar (BC) at a rate of 2%, foliar application of 24-epibrassinolide at two different levels (1 (BR1) or 3 (BR2) μmol) and the combination between BC and BR treatments. The obtained results were statistically analyzed, and the heat-map conceits between measured variables were also calculated by using the Python software. This investigation took place under the greenhouse conditions for 35 days following a complete randomized design and all treatments were replicated trice. Results obtained herein revealed that drought stress decreased all studied vegetative growth parameters (root and shoot biomasses) and photosynthetic pigments (chlorophyll a, b and total contents while increased oxidative stress indicators. All additives, specifically the combined ones BR1+BC and BR2+BC, were effective in increasing growth attributes, photosynthetic pigments and ion assimilation by wheat plants. They also upraised the levels of enzymatic and non-enzymatic antioxidants while decreased stress indicators. Furthermore, they increased Ca, P and K content within plants. It can therefore be deduced that the integral application of BR and BC is essential to mitigate drought stress in plants.

Effect of Nitric Oxide on the Secondary Metabolites of Taxus chinensis var. mairei under UV-B Exposure

2014 ◽  
Vol 1073-1076 ◽  
pp. 114-117 ◽  
Author(s):  
De Wen Li ◽  
Mei Lan Li ◽  
Ying Liu ◽  
Yuan Gang Zu
Keyword(s):  
Nitric Oxide ◽  
Secondary Metabolites ◽  
Sodium Nitroprusside ◽  
Photosynthetic Pigments ◽  
Condensed Tannins ◽  
Potassium Salt ◽  
Total Phenolics ◽  
Taxus Chinensis ◽  
Total Chlorophyll ◽  
No Donor

In this paper, the effect of nitric oxide (NO) on the secondary metabolites of Taxus chinensis var. mairei under elevated UV-B radiation was studied. The 5-year-old seedlings were used as test materials. The sodium nitroprusside (SNP) was as the NO donor and Carboxy-PTIO potassium salt (cPTIO) as the NO scavenger. The results showed that the SNP, UV, UV-B+SNP treatments significantly increased the contents of photosynthetic pigments (p<0.05). The contents of chlorophyll a, chlorophyll b, carotenoid and total chlorophyll exhibited CK < cPTIO < UV-B+cPTIO < UV-B < SNP < UV-B+SNP. SNP, cPTIO, UV-B, UV-B+SNP and UV-B+cPTIO significantly increased the concentrations of flavonoids, condensed tannins, total phenolics and taxol (p<0.05). Spraying SNP and cPTIO had significant effect on the taxol concentration (p<0.05). The concentrations of flavonoids, condensed tannins, total phenolics and taxol reached the maximum under the UV-B+cPTIO treatment. Spraying different concentrations of SNP or cPTIO might affect the NO content in plants, and then impact on the secondary metabolism, which mechanism needs further investigation.

THE PERFORMANCE OF DELPHINIUM (Delphinium ajacis (L.) Schur.) PLANTS UNDER DROUGHT STRESS, HYDROGEN PEROXIDE AND SALICYLIC ACID TREATMENTS

2019 ◽  
pp. 73-91
Keyword(s):  
Hydrogen Peroxide ◽  
Salicylic Acid ◽  
Drought Stress ◽  
Chemical Composition ◽  
Vegetative Growth ◽  
Growth Parameters ◽  
Stress Conditions ◽  
The Other ◽  
Total Phenols ◽  
Greenhouse Experiments

Greenhouse experiments were conducted during the two successive winter seasons of (2016 – 2017) and (2017- 2018) in order to enhance the performance of Delphinium plants under drought stress conditions and the possibility of enhancing vegetative growth, flowering growth, and chemical composition. Experiments were designed as a split-plot based on randomized complete block with three replications in a private commercial nursery in Damanhour City, El-Beheira Governorate, Egypt. The experiments were conducted by applying foliar applications of hydrogen peroxide (H2O2) at 0, 1250 and 2500 ppm and salicylic acid (SA) at 0, 100 and 200 ppm. The vegetative, root and flowering growth and chemical composition of Delphinium plants grown under drought stress were examined. The obtained results of the two seasons revealed that either SA or H2O2 treatments caused significant increase in growth parameters and chemical composition of Delphinium plants compare to control plants. Salicylic acid at a concentration of 100 ppm was more effective in increasing vegetative, root and flowering growth, and photosynthesis parameters, followed by H2O2 at a concentration of 1250 ppm compared to the other treatments. On the other hand, H2O2 at a concentration of 2500 ppm was more effective in increasing total phenols and H2O2 content in leaves.

scholarly journals Exogenous salicylic acid and hydrogen peroxide attenuate drought stress in rice

2020 ◽  
Vol 66 (No. 1) ◽  
pp. 7-13 ◽  
Author(s):  
Abdullah Al Mamun Sohag ◽  
Md. Tahjib-Ul-Arif ◽  
Marian Brestic ◽  
Sonya Afrin ◽  
Md. Arif Sakil ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Salicylic Acid ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Oxidative Damage ◽  
Photosynthetic Pigments ◽  
Oryza Sativa L ◽  
Water Status ◽  
Protective Effects ◽  
Rice Seedlings

Hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and salicylic acid (SA) exhibit protective effects against a wide array of stresses. In this study, we investigated the relative efficacy of exogenous H<sub>2</sub>O<sub>2</sub> and SA in conferring drought tolerance in rice (Oryza sativa L.). The experiment was repeated two times, firstly in a hydroponic system and secondly in soil. The results revealed that drought hampered germination indices, seedling growth, photosynthetic pigments, and water content, whereas increased proline content. It also triggered higher H<sub>2</sub>O<sub>2</sub> production and consequently elevated lipid peroxidation, which is a particular indication of oxidative damage. However, exogenous H<sub>2</sub>O<sub>2</sub> or SA treatment effectively alleviated oxidative damage in rice seedlings both in hydroponic and soil systems via upregulating antioxidant enzymes. Nevertheless, regulation of proline level and augmentation of plant-water status were crucial to confer drought tolerance. Exogenous H<sub>2</sub>O<sub>2</sub> or SA also protected photosynthetic pigments from oxidative damage that might help to maintain normal photosynthesis under drought. Besides, 5 mmol/L H<sub>2</sub>O<sub>2</sub> and 0.5 or 1 mmol/L SA showed similar effectiveness on mitigating drought stress. Finally, our findings suggest that exogenous H<sub>2</sub>O<sub>2</sub> or SA could evenly be effectual in the amending growth of rice seedlings under drought conditions.

scholarly journals Effect of elicitors on growth, biochemical and antioxidant activity in two varieties of wheat (Triticum aestivum L.) under drought

2019 ◽  
Author(s):  
Amrita Thakur ◽  
Nilima Kumari ◽  
Vinay Sharma
Keyword(s):  
Antioxidant Activity ◽  
Triticum Aestivum ◽  
Salicylic Acid ◽  
Drought Stress ◽  
Silver Nitrate ◽  
Sodium Nitroprusside ◽  
Triticum Aestivum L ◽  
Antioxidant Parameters

The study investigated the effect of different elicitors on two varieties of Triticum aestivum (10 days old seedlings) under drought stress. The growth of plants along with various biochemical and antioxidant parameters was determined on 5th, 10th and 15th day of drought stress. Six varieties of wheat viz. RAJ-4120, RAJ-4079, RAJ-3077, RAJ-4238, RAJ-4037 and RAJ-3765 were treated with different elicitors i.e. sodium nitroprusside (0.5mM), salicylic acid (10mM) and silver nitrate (10mM) for six hours before sowing and exposed to drought stress. Chemically primed seeds were sown in pots containing soil along with hydro primed seeds which were not pretreated with any chemical and were used as control. The results indicated that in all the control plants, growth of the seedlings increased with time. In drought stressed seedlings the growth was less than the control plants. Seedlings pretreated with sodium nitroprusside showed the highest growth, biochemical and antioxidant activity. Under drought stress also these parameters were higher in sodium nitroprusside pretreated plants when compared to stressed plants having no pretreatment.

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