scholarly journals Effects of Corm Dipping in Salicylic Acid or Potassium Nitrate on Growth, Flowering, and Quality of Saffron

2018 ◽  
Vol 26 (1) ◽  
pp. 13-21
Author(s):  
Mehdi Khayyat ◽  
Mani Jabbari ◽  
Hamid-Reza Fallahi ◽  
Alireza Samadzadeh
Keyword(s):  
Salicylic Acid ◽  
Field Condition ◽  
Stability Index ◽  
Dry Weight ◽  
Potassium Nitrate ◽  
Membrane Stability Index ◽  
Flower Number ◽  
Appearance Rate ◽  
Chlorophyll A Content

Abstract The present research was conducted to find influence of salicylic acid (SA) at 0.5, 1, and 2 mM and potassium nitrate (KNO3) at 250, 500, and 1 000 ppm on reproductive and vegetative parameters, and color characteristics of saffron under field condition. The results indicated the highest a, L, and chroma and the lowest b at 2 mM SA treatment. The highest flowering appearance rate and membrane stability index and the lowest electrolyte leakage were observed at 2 mM SA and to lesser extent at 1000 ppm KNO3. The highest flower number, corolla dry weight, and stigma dry weight was shown in plants treated with SA. Chlorophyll a content and Fv/Fm value increased with the application of 2 mM SA. The data indicated the effectiveness of SA on the growth of saffron.

scholarly journals Physiological quality of osmoprimed gherkin seeds

2013 ◽  
Vol 35 (3) ◽  
pp. 368-373 ◽  
Author(s):  
Rodrigo de Góes Esperon Reis ◽  
Humberto Pereira da Silva ◽  
José Maria Gomes Neves ◽  
Renato Mendes Guimarães
Keyword(s):  
Electrical Conductivity ◽  
Room Temperature ◽  
Dry Weight ◽  
Potassium Nitrate ◽  
Germination Percentage ◽  
Initial Profile ◽  
Randomized Design ◽  
Physiological Quality ◽  
Osmotic Potentials

It was aimed to verify the effect of different methodologies of osmopriming on physiological quality of gherkin seeds. Prior, it has been characterized the initial profile of the gherkin seeds. Then, the seeds were osmoprimed in gerboxes containing two blotter papers wetted with osmotic solutions in a volume equal to three times the paper dry weight and kept in BOD at 15 °C. After the priming, the seeds were dried at room temperature for 48 hours. Then, the following variables were evaluated: seeds moisture content, percentage of germination, percentage of emergence, emergence speed index and electrical conductivity. The analyses of variances were realized according to a randomized design in a factorial scheme 3 x 2 x 4: three solutes (polyetilene glycol 6000 - PEG, potassium nitrate - KNO3 and PEG + KNO3), two osmotic potentials (-0.55 and -1.10 MPa) and four times of priming (24, 48, 72 and 96 hours), followed by analyses of regression. It is concluded that the priming has no effect on germination and affects positively the vigor of the gherkin seeds lots; osmopriming with potassium nitrate is effective in improving the physiological quality of gherkin seeds lot.

scholarly journals Current Fertilizer Input for Pot Gerbera Production Can Be Reduced by More than 50%

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 775D-775
Author(s):  
Youbin Zheng* ◽  
Thomas Graham ◽  
Stefan Richard ◽  
Mike Dixon
Keyword(s):  
Nutrient Solution ◽  
Crop Production ◽  
Negative Impact ◽  
Dry Weight ◽  
Flower Number ◽  
Leaf Chlorophyll ◽  
Phytotoxic Effect ◽  
Total Dry Weight ◽  
Nutrient Solutions

Pot gerbera (Gerbera jamesonii Var. `Shogun') plants were subirrigated with one of four nutrient solutions (10, 25, 50, and 100% of full strength) in order to determine whether currently used commercial nutrient solution concentrations can be reduced without negative impact on crop production. Nutrient concentration levels did not affect leaf area, flower number and appearance, and plant total dry weight. There were no significant differences in leaf chlorophyll content between the plants that received the 50 and 100% strength nutrient solutions. It is concluded that nutrient solution concentrations typically used in commercial greenhouse, for pot gerbera production, can be safely reduced by at least 50% without adversely affecting crop production. Nutrients accumulated in the top section of the growth substrate under all treatment levels; however, no phytotoxic effect was observed. Fertilizer inputs were reduced in the 50%, 25%, and 10% treatments by 54%, 75%, and 90% respectively. After 4 weeks recirculating, the quality of the nutrient solutions was still within acceptable limits.

scholarly journals Growth, physiological, and biochemical responses of thyme (Thymus vulgaris L.) to the application of arbuscular mycorrhizal fungi under cadmium stress conditions

2021 ◽  
Vol 49 (3) ◽  
pp. 11924
Author(s):  
Seyed A. HOSSEINI ◽  
Roya ROSTAMI ◽  
Behrooz ESMAIELPOUR ◽  
Alireza ETMINAN ◽  
Ghobad SALIMI
Keyword(s):  
Mycorrhizal Fungi ◽  
Stability Index ◽  
Arbuscular Mycorrhizal ◽  
Dry Weight ◽  
Cadmium Stress ◽  
Thymus Vulgaris ◽  
Cd Stress ◽  
Membrane Stability Index ◽  
Number Of Leaves ◽  
Amf Inoculation

Thyme (Thymus vulgaris L.) is one of the most important medicinal plants used in various pharmaceutical, osmotic, health, and food industries. Arbuscular mycorrhizal fungi (AMF) symbiosis is viewed as one of the several methods to improve growth under heavy metals stress. To investigate the effects of cadmium (Cd) and AMF bio-fertilizers on the growth and morpho-physiological characteristics of thyme, a greenhouse experiment was performed in three replications. Experimental treatments included Cd at three levels 0, 75, and 150 mg/kg of soil and AMF at three levels without inoculation, inoculation with Funneliformis etunicatum, and Funneliformis mosseae. Cadmium stressed plant showed reduced plant height, number of leaves, stem fresh and dry weight, and root fresh and dry weight while AMF inoculation enhanced the increased means of these traits considerably. Inoculation with F. mosseae also ameliorated the Cd stress (150 mg/kg) induced reduction in plant height, number of leaves, and stem and root dry weight by 13.41%, 8.42%, 30.3%, and 22.2%, respectively. Cadmium stress reduced membrane stability index while AMF inoculation enhanced membrane stability index considerably. An increase in soluble carbohydrate and proline content was observed due to Cd stress and AMF inoculation caused a further increase in these two metabolite contents ensuring better growth under Cd stressed conditions. Results indicated that F. mosseae had a higher efficiency in increasing morphological traits and improving physiological characteristics than F. etunicatum. Overall, AMF inoculation, especially F. mosseae significant ameliorative potential for Cd toxicity in thyme plants.

scholarly journals The Effect of Halopriming and Salicylic Acid on the Germination of Fenugreek (Trigonella foenum-graecum) under Different Cadmium Concentrations

2015 ◽  
Vol 7 (3) ◽  
pp. 322-329 ◽  
Author(s):  
Arezoo ESPANANY ◽  
Seyfollah FALLAH ◽  
Ali TADAYYON
Keyword(s):  
Salicylic Acid ◽  
Potassium Chloride ◽  
Root Elongation ◽  
Dry Weight ◽  
Seed Priming ◽  
Shoot Elongation ◽  
Potassium Nitrate ◽  
Germination Percentage ◽  
Trigonella Foenum Graecum ◽  
Four Levels

The hereby study was based on a factorial experiment conducted in a completely randomized design with four replications, at Agriculture College, Shahrekord University, Iran, in 2014. The role of salicylic acid (SA), potassium nitrate (KNO3) and potassium chloride (KCl) was evaluated on seed germination of fenugreek (Trigonella foenum-graecum L.) under different cadmium concentrations. Treatments included four levels of seed priming (no priming, potassium chloride, potassium nitrate, salicylic acid) and four levels of cadmium concentration (0, 10, 20, 30 mg/L). Cadmium chloride caused a significant inhibition in germination percentage, root elongation, shoot elongation and seedling dry weight. The shoot length was more sensitive to cadmium concentrations than the root length. Primed seeds with SA (100 mg/L) proved protection against Cd stress and increased the germination percentage, root elongation, shoot elongation and dry weight of seedlings compared to the control treatment. Seeds treated with SA alleviated the Cd negative effect on germination parameters. In conclusion, using seed priming with salicylic acid can be recommended as a good technique for fenugreek crop on fields exposed to high cadmium toxicity.

scholarly journals Physiological quality of Urochloa brizantha seeds submitted to priming with calcium salts

2019 ◽  
Vol 49 ◽  
Author(s):  
Elizena Cristina Gomes Ribeiro ◽  
Rodrigo de Góes Esperon Reis ◽  
Cesar Crispim Vilar ◽  
Flavia Carolina Moreira Vilar
Keyword(s):  
Calcium Sulfate ◽  
Seedling Emergence ◽  
Nitrate Solution ◽  
Calcium Nitrate ◽  
Dry Weight ◽  
Potassium Nitrate ◽  
Calcium Salts ◽  
Physiological Quality ◽  
Urochloa Brizantha

ABSTRACT Seed priming provides a variety of benefits, including seed invigoration and reduced dormancy. Urochloa brizantha seeds are typically primed with difficult-to-acquire potassium nitrate (KNO3). In this sense, calcium salts stand out as an alternative, but it is important to determine whether they provide the same benefits as potassium nitrate. This study aimed to evaluate the physiological quality of U. brizantha seeds after priming with calcium salts, and compare the results to those obtained with potassium nitrate. Seeds were submitted to priming with calcium nitrate [Ca(NO3)2] and calcium sulphate (CaSO4) at -0.55 MPa and -1.10 MPa, for 12 h and 24 h, and potassium nitrate (KNO3) at -1.10 MPa for 12 h, as well as to no priming (control). A completely randomized design, with ten treatments and four repetitions, was used. Priming promoted a higher germination percentage and lower seed dormancy, with a greater seedling emergence in a shorter time period. CaSO4 did not differ from KNO3 in shoot dry weight of seedlings, but reduced the electrical conductivity of seeds. Calcium nitrate and calcium sulfate show a promising potential for use in the osmotic priming of Urochloa brizantha (BRS Piatã cultivar) seeds, since they are as efficient as potassium nitrate, as well as less costly and easier to purchase. Calcium sulfate priming at -0.55 MPa for 12 h, at 25 ºC, is recommended to replace the potassium nitrate solution.

Effect of planting date and density on calendula and peppermint herbs

2014 ◽  
Vol 1 (1) ◽  
pp. 25-29
Author(s):  
Rahim Mohammadian ◽  
Behnam Tahmasebpour ◽  
Peyvand Samimifar
Keyword(s):  
Mutual Effect ◽  
Dry Weight ◽  
Planting Date ◽  
Mass Reduction ◽  
Flower Number ◽  
Planting Dates ◽  
Randomized Design ◽  
Significant Difference ◽  
Completely Randomized Design ◽  
Total Maximum

A factorial experiment was conducted with a completely randomized design to evaluate the effects of planting date and density on calendula herbs and peppermint. It had 3 replicates and was done in Khosroshahr research farm, Tabriz in 2006. Under studied factors were: 3 planting dates (10 May, 25 May and 10 June) in 4 densities (25, 35, 45, 55) of the plant in square meters. The results of variance a nalysis showed that there was 1% probability significant difference between the effects of planting date and bush density on the leave number, bush height and the bush dry weight. But the mutual effect of the plant date in mentioned traits density was insignificant. Regarding the traits mean comparison, the total maximum dry weight was about the 55 bush density in mm. Also, the bush high density in mm causes the bush growth and its mass reduction. When there is the density grain, the flower number will increase due to bush grain in surface unit. Overall, we can conclude that 10 June planting and 45 bush density in mm is the most suitable items and results in favored production with high essence for these crops.

scholarly journals Efficacy of KNO3, SiO2 and SA priming for improving emergence, seedling growth and antioxidant enzymes of rice (Oryza sativa), under drought

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lawan Gana Ali ◽  
Rosimah Nulit ◽  
Mohd Hafiz Ibrahim ◽  
Christina Yong Seok Yien
Keyword(s):  
Salicylic Acid ◽  
Seedling Growth ◽  
Antioxidant Activities ◽  
Soluble Sugar ◽  
Seed Priming ◽  
Potassium Nitrate ◽  
Total Soluble Protein ◽  
Rice Seedlings ◽  
Chlorophyll Contents ◽  
Randomized Design

AbstractRice is an important staple crop produced and consumed worldwide. However, poor seed emergence is one of the main impediments to obtaining higher yield of rice especially in hot and dry ecosystems of the world that are ravaged by drought. Therefore, this study was carried out to evaluate the effects of potassium nitrate (KNO3), salicylic acid (SA) and silicon dioxide (SiO2) priming in improving emergence, seedling growth, biochemical attributes and antioxidant activities of FARO44 rice under drought conditions. Rice seedlings primed with 2.5% and 5% KNO3, 3% and 3.5% SiO2, and 1 mM and 2.5 mM SA were subjected to three drought levels of low, moderate and severe under the greenhouse. Seed emergence, seedling growth, biochemical attributes and antioxidant activities were thereafter evaluated. Seed priming experiments were laid in a completely randomized design with five replicates per treatment. The results found that rice seedlings responded differently to different priming treatments. However, all primed rice seedlings had significantly (P ≤ 0.05) improved emergence percentage (72–92%), seedling growth, seedling vigor, seedling fresh and dry biomass and shorter emergence time compared with controls. Likewise, total soluble protein content, activities of catalase, ascorbate peroxidase and superoxide dismutase, carbohydrate, soluble sugar and total chlorophyll contents of rice seedlings were increased by more than two-folds by seed priming compared with control. Salicylic acid showed less effect in increasing emergence, seedling growth, antioxidant activities and biochemical attributes of rice. Thus, this study established that seed priming with KNO3 (2.5% and 5%) and SiO2 (3% and 3.5%) were more effective in improving emergence, seedling growth, biochemical attributes and antioxidant activities of FARO44. Thus, priming of FARO44 rice with this chemical is recommended for fast emergence, seedling growth and drought resistance in dry ecosystems.

Foliar application and seed priming of salicylic acid affect growth, fruit yield, and quality of grape tomato under drought stress

2021 ◽  
Vol 280 ◽  
pp. 109904
Author(s):  
Remi Chakma ◽  
Arindam Biswas ◽  
Pantamit Saekong ◽  
Hayat Ullah ◽  
Avishek Datta
Keyword(s):  
Salicylic Acid ◽  
Drought Stress ◽  
Foliar Application ◽  
Seed Priming ◽  
Fruit Yield ◽  
Yield And Quality

scholarly journals Salinization/sodification of soil and physiological dynamics of sunflower irrigated with saline–sodic water amending by potassium and farm yard manure

2016 ◽  
Vol 7 (4) ◽  
pp. 476-487 ◽  
Author(s):  
M. Ashraf ◽  
S. Muhammad Shahzad ◽  
N. Akhtar ◽  
M. Imtiaz ◽  
A. Ali
Keyword(s):  
Photosynthetic Rate ◽  
Stability Index ◽  
Soil Salinization ◽  
Sodium Adsorption Ratio ◽  
Membrane Stability Index ◽  
Farm Yard Manure ◽  
Canal Water ◽  
Subsequent Increase ◽  
Sodic Water ◽  
Relative Water

Sunflower (Helianthus annuus L.) plants were grown with saline–sodic water (SSW) by treating with potassium (K @ 100 and 200 mg K2O kg−1 soil) and farm yard manure (FYM @ 5 and 10% of soil, w/w). Irrigation with untreated SSW caused soil salinization/sodification, leading to an increase in electrical conductivity (EC) of 165% and sodium adsorption ratio (SAR) 100% with the subsequent increase of 736% in shoot Na+, a decrease of 52% in shoot K+ and 94% in shoot K+:Na+ratio compared to canal water. SSW also decreased physiological activities: 31% relative water content (RWC), 34% membrane stability index (MSI), 51% protein, 33% chlorophyll and 58% photosynthetic rate compared to canal water. Integrated application of K and FYM, at higher level, decreased soil EC by 54% and SAR 43%, and shoot Na+ 57% with a corresponding improvement in soil organic matter 166%, shoot K+ 360%, shoot K+:Na+ratio 987%, RWC 34%, MSI 37%, protein 60%, photosynthetic rate 102%, superoxide dismutase 92%, peroxidase 78% and catalase 52% compared to SSW without K and/or FYM. In conclusion, exogenous application of K and FYM could be a promising approach to use brackish water in agriculture on a sustainable basis.

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