Showing 12 results for Salicylic Acid
H. Pirasteh-Anosheh , Y. Emam,
Volume 2, Issue 5 (12-2012)
Abstract
Plant growth regulators (PGRs), which are widely used in agriculture, have various effects on different morphological and physiological characteristics of wheat cultivars. To examine the effect of two PGRs [cycocel (CCC) and salicylic acid (SA)] on some morphological and physiological properties of bread (Roshan) and durum (Yavarous) wheat cultivars under different irrigation regimes [normal (as control), moderate drought and severe drought], a study was conducted at Research Farm and Greenhouse of College of Agriculture, Shiraz University during 2009-2010 growing season. Field and greenhouse studies were performed as a split plot based on randomized complete blocks design and completely randomized design, respectively. The results showed that drought stress decreased plant height, leaf area index (LAI) and peduncle length, while it increased canopy temperature (CT), SPAD unit, free proline and total soluble proteins. The highest and lowest effect of drought stress was observed in free proline (104% increase) and plant height (18% reduction), respectively. PGRs application increased LAI (9%), free proline (51%) and soluble proteins (57%) and decreased CT (14%) and SPAD unit (13%). SA increased plant height, while it was decreased under CCC application. Sensitivity of Roshan to drought stress and both PGRs was greater than Yavarous. Overall, the results indicated that although drought stress decreased plant growth in both wheat cultivars, but application of PGRs alleviated negative effects of drought stress on morpho-physiological characteristics.
M. J. Arvin, Kh. Moslemi, M. Sarchashmepur, B. Karamat, H. Olumi, F. Daneshmand,
Volume 4, Issue 11 (4-2014)
Abstract
Soil accumulation with toxic metals and their transmition into agricultural products as a world problem is ever expanding. Cadmium (Cd) content of soil has increased due to luxury consumption of phosphorous fertilizers application which enters human food chain. In present study which was conducted in college of agriculture, Kerman University in 2010, the effects of chemical treatments namely salicylic (SA) at 0.1mM, silicon (Si) at 5 mM and SA+Si (0.1 mM and 5 mM) was studied on growth and development and cadmium accumulation in potato tubers grown under cadmium stress (0 and 12 mg/kg soil) in a pot experiment, using a factorial experiment with three replications. Compared with control treatment (No Cd), Cd decreased relative water content (RWC), photosynthetic and plant growth parameters. It also increased leaf malondialdehyde (MDA) and Cd accumulation in tubers. All chemical treatments improved plant performance under Cd stress and non-stress conditions and the effect of SA+Si was more pronounced for most recorded parameters. However, under Cd stress, combination of SA+Si increased tuber number (81%) , tuber fresh weight (112%), chlorophylls (50%) and decreased MDA (50%) and Cd accumulation in tubers (85%), relative to corresponding control and therefore, this treatment (SA+Si) can be commercially used to improve plant performance and reduce tuber Cd contents under field conditions.
Z. Dashagha, M. Mazaheri Tirani2, M. Ghasemi Khorasghani,
Volume 4, Issue 11 (4-2014)
Abstract
In this study, the difference between the resistance of wheat plants (c3) and maize (c4) the salinity was investigated. Research on environmental stresses (Hakimi, 2008) show thatstresses are considered as Limiting factors in crop production.and some phenolic compounds such as salicylic acid are used to improve or alleviate the negative effects of stress. In this study, plants were grown in plastic pots and the plants treated with salicylic acid, after two weeks and seven days later salinity was exerted.The effect of salinity treatmenton both plants, for some morphological and biochemical characteristics were studied. In biochemical tests, lipid peroxidation under salinity and salicylic acid treatments has increased for weat which represents the effect of salinity on the plant and the activetion of the defense mechanism, Howweverthese factors have reduced formaize. Moreover, the increase in total chlorophyll and flavonoids in wheatchlorophyll in wheat and maize shows the role of these pigments in quenching hydrogen peroxide and other active Oxygen types. This increases has not been concideralle in maize. The effect of treatment on the weight of … and root of both plants differed under the investigated concentration.
M. R. Asghari, H. Ghaffari Bagtash, Y. Rasmiy, A. R. Farokhzad,
Volume 4, Issue 13 (1-2015)
Abstract
This study investigated the effect of salicylic acid (SA) and nitric oxide (NO) and combinations of these treatments at different concentrations on some physical and chemical attributes of apple fruit (cv. Red delicious). Fruits were treated with nitric oxide (at 0, 3, 5 and 7 µmol L-1) and salicylic acid (at 0, 1 and 2 mmol L-1) and stored at 0 to 1oC with 85-95% RH for 2 and 5 months. Fruit quality attributes including firmness, total phenolics, weight losses, decay index and marketability were evaluated. All treatments maintained fruit firmness compared to control. Combination treatment of 5 µmol L-1 NO with 2 mmol L-1 SA significantly prevented fruit softening. Fruits treated with combination of 3 µmol L-1 NO and 1 mmol L-1 SA had higher phenolics content. The lowest weight loss was recorded in the fruits treated with 3 µmol L-1 NO and 2 mmol L-1 SA. Post harvest treatment of fruits with 3 µmol L-1 NO and 2 mmol L-1 SA effectively controlled decaying organisms and retained fruit quality. All treatments significantly maintained fruit marketability. It was concluded that post harvest treatment of fruits with combination of NO and SA is a good alternative to chemicals in post harvest technology of apple fruit.
H. Samady, A. Hatamzade, M. Ghasemnezhad, H. Zakizade, S. S. Hosseini,
Volume 4, Issue 13 (1-2015)
Abstract
This experiment was conducted on rose cut flowers, Red Naomy cultivar, with the length of 35 cm, for 18 hours as a short-term treatment in a factorial based on completely randomized design with five treatments including sucrose + 8-Hydroxyquinoline sulfate, salicylic acid + sucrose + 8-Hydroxyquinoline sulfate, ascorbic acid + sucrose + 8-Hydroxyquinoline sulfate, Salicylic acid + ascorbic acid + sucrose + 8-Hydroxyquinoline sulfate and distilled water as control, and three replications in bottles. Morphological traits such as shelf life, changes in water uptake, fresh weight, flower diameter and physiological traits such as total protein and proline contents were measured. The results showed that combination of Salicylic acid + sucrose + 8-Hydroxyquinoline sulfate treatment significantly affected shelf life compared to control and other treatments. The results also revealed that the combination of Salicylic acid + ascorbic acid + sucrose + 8-Hydroxyquinoline sulfate delayed flowers senescence and increased the amount of water uptake, fresh weight and flower diameter. Moreover, the greatest protein and proline contents were obtained under ascorbic acid + sucrose + 8-Hydroxyquinoline sulfate treatment and sucrose + 8-Hydroxyquinoline sulfate, respectively.
S. L. Akbari, M. Sayyari, F. Ghanbari,
Volume 5, Issue 16 (9-2015)
Abstract
Plants with tropical origin including those of the Cucurbitaceae family are generally sensitive to chilling stress and harmed by low temperatures. In this study, we evaluated five plant growth regulators and compared the effectiveness of each substance in improving chilling stress tolerance of cucumber (Cucumis sativus L., cv. Super dominos) seedlings. The experiment was conducted as a randomized complete block design with seven treatments including: control, seed and foliar application of Catechin and oxalic acid and foliar application of Metyl jasmonate, Metyl salicylat and salicylic acid with. After treatments, the seedlings were subjected to chilling 5h/day at 3oC for 7 days. 72 hours after chilling, all plants were evaluated with some chilling resistance indices and growth parameters. Results showed that application of Catechin, Oxalic acid and salicylic acid improved growth parameters and increased tolerance to low temperature of the seedlings as indicated by electrolyte leakage, proline and malondialdehyde content. These substances ameliorated the by chilling stress-induced injury via enhancing chlorophyll and proline content and subsequently decreases in leaf electrolyte leakage and malondialdehyde content. Catechin and oxalic acid were more effective in increasing chilling tolerance of cucumber seedlings, when applied with seed soaking method than with foliar spray. In general, it may be concluded that Catechin, oxalic acid and salicylic acid could be used effectively to protect cucumber seedling from damaging effect of chilling stress at the early stages of growth.
Y. Moradmand, M. Mobli, A. A. Ramin,
Volume 5, Issue 16 (9-2015)
Abstract
Among the chemicals that their effects on reducing chilling injury has recently been studied are salicylates and jasmonates. Therefore, in this study the effects of salicylic acid and methyl jasmonate on increasing the cold tolerance of bell pepper cv. Emily was examined. Experiment was done as a 7×2 factorial in the completely randomized design (CRD) with four replications. The first factor contained salicylic acid in three concentrations of 0.1, 0.5 and 1 mM and methyl jasmonate at the rates of 0.001, 0.01 and 0.1 mM plus control (distilled water) and the second factor involved application of hormone, spraying whole plant and soil drenching. Treatments were applied at 7-9 leaves stage. After application of hormones, plants moved to 0º C for 3 days and then returned back to greenhouse temperature. Three days later different attributes were measured. Results showed that except for soluble sugars and leaf proline, there was no significant differences between two methods of hormone application. For all traits, application of hormone showed significant effects but due to significant interactions between hormone and application method, the effect of hormone treatment depended on the method of application. Drenching 0.5 mM salicylic acid reduced chilling injury (necrotic lesions) and increased quantum efficiency of PSII (Fv/Fm), chlorophyll content, soluble sugars and leaf proline, compared to untreated plants, thus improved cold tolerance. Methyl jasmonate in the rate of 0.01 mM reduced chilling injury and increased Fv/Fm in comparison with control, but only when it was used as drench it increased concentrations of chlorophyll a and b and soluble sugars and cold tolerance compared to other two concentrations.
A. Isapareh, A. Hatamzadeh, M. Ghasemnezhad ,
Volume 5, Issue 18 (2-2016)
Abstract
Premature leaf yellowing of Alstroemeria cut flowers prior to petal fall is the most important limiting factor of the flower postharvest life. In this study, cut flower Alstroemeria cv. Bridal were treated for 24 hours with different solutions including gibberllic acid, benzyl adenine, natural essential oil carvacrol with two concentrations of 50 and 100 mg L-1, 5-sulfo salicylic acid in two concentrations of 1 and 1.5 mM, sucrose in two concentrations of 5 and 10%. Ethanol and distilled water were used as controls. After treatment, flowers were placed in distilled water. The traits including vase life of flower and leaf, relative fresh weight, water uptake, chlorophyll and carotenoids contents were measured. The results showed that both concentrations of gibberellic acid (50 and 100 mgL-1) had the highest effect in delaying of flower aging for 3.33 and 3 days, respectively, compared to the control. Relative fresh weight and water uptake also were higher in mentioned treatments, than the other treatments. The gibberellic acid (50 and 100 mg L-1), benzyladenine (100 mg L-1) and 5-Sulfo salicylic acid (1.5 mM) treatments led to the postponement of leaf yellowing relative to the remaining treatments. Also, in the mentioned treatments chlorophyll content was found to be greater than the other treatments, but carotenoids level was lower, compared to control treatments. Overall, the increase in quality and shelf life of Alstroemeria cut flowers cv 'Bridal' due to both gibberellic acid treatments (50 and 100 mg L-1) was found to be greater than the increase due to the other examined solutions.
M. E. Sedaghat, Y. Emam,
Volume 6, Issue 21 (12-2016)
Abstract
Plant growth regulators (PGRs) are used to prevent reduction in wheat grain yield under limited moisture conditions. The effect of 3 PGRs including cycocel, salicylic acid and brassinoestroeid on yield and yield components of four wheat cultivars (Chamran, Shiroudi, Pishtaz and Sirvan) under well watered and water stress (withheld irrigation after flowering) was examined. The experiment was carried out as a factorial split plot in a completely randomized block design with three replicates at research farm of Sarvestan, Fars province in 2014-15 growing season. The results showed that drought stress reduced ear weight, grains per ear, grain weight per ear, thousand grain weight, harvest index, biological yield and grain yield, significantly. Albeit, the extent of the decrease varied, i.e. the smallest and greatest decreases were found in thousand grain weight (7%) and number of grains per ear (13%), respectively. Furthermore, application of PGRs especially cycocel, could increase ear weight, grains per spike, harvest index, thousand grain weight and consequently, grain yield. Among cultivars, Sirvan had the highest and Shiroudi had the lowest yield under both moisture regimes. According to our results although drought stress suppresses wheat yield and yield components, PGRs could be harnessed to compensate some parts of drought stress. Therefore, use of PGRs could be recommended to alleviate the drought stress effect on bread wheat.
M. H. Shirzadi, A. Bideshki,
Volume 8, Issue 2 (8-2018)
Abstract
Drought stress is the most important factor which negatively effects the plant growth and crop productivity in arid and semi-arid areas. Therefore, in a field experiment, the effect of Salicylic acid (0, 0.5 and 1mM) and Methyl jasmonate (0, 5 and 10µM) was studied on growth parameters and bulb yield of a Primavera cultivar onion under water stress conditions in 2015. The results showed that drought stress significantly reduced and SA and MJ increased all measured traits. Interactive effects of MJ × drought stress and SA × drought stress was significant on plant fresh weight, chlorophyll a, b and total, and carotenoids concentrations, relative water content, bulb length and diameter and plant height. Interaction of drought stress × methyl jasmonate × salicylic acid on the leaf number, plant dry weight, ionic leakage and the final bulb yield was significant and the highest bulb yield was obtained in non-stress condition treatment and combined 0.5 mM salicylic acid and 10µM methyl jasmonate. The highest bulb yield in drought stress conditions was obtained when plants were exposed to 1mM salicylic acid and 10µM methyl jasmonate treatment.
A. Hatami, A. H. Abutalebi Jahromi,
Volume 10, Issue 4 (1-2021)
Abstract
In order to evaluate the effect of harvesting time, storage temperature and non-toxic treatments of Putrescine (Pu), salicylic acid (SA) and thyme and cloves essential oils (TEO and CEO) on qualitative and quantitative characteristics of Mexican lime fruit, a factorial completely randomized design experiment was performed. This experiment was conducted with three storage temperature levels including ambient temperature (22±3°C), 4±1 and 8±1°C, and the treatments including Pu (1, 2 and 3 mmol), SA (200, 400 and 600 mg/l), TEO and CEO (150, 300 and 450 mg/l) and distilled water as control treatment. The fruits were harvested in two stages including the maturity stage (early color change) and the ripening stage (yellow color) in four replications and 10 fruits in each replication. Effects of harvesting time, storage temperature and treatment type on fruit quality attributes were significant (p<0.01). It was found that the green harvesting stage is the best time for harvesting. It was further found that storing at temperatures above 4°C is the most effective temperature in increasing the postharvest life of Mexican lime fruits. It was also found that the 2 and 3 mmol Pu applications can be used to preserve and maintain the Mexican lime fruits.
A. Abbasian, Dr H. Aminpanah,
Volume 11, Issue 1 (4-2021)
Abstract
Drought is one of the most important factors limiting crop yield and foliar application of phytoprotectants is an important management strategy for increasing crop resistance to drought stress. This research was conducted at Rice Research Station of Tonekabon, Iran, in 2018 by using a split-plot based on a Randomized Complete Block Design (RCBD) with three replicates. Main plots were irrigation regimes [common irrigation (control), and irrigation withold from tillering stage (45 days after transplanting)] and subplots were foliar application of phytoprotectants (control, selenium, silicon, ascorbic acid, salicylic acid). The results showed that irrigation withold from tillering stage caused a 29.3% reduction in grain yield in the absence of foliar application. Drought stress decreased plant height, tiller number and 1000-grain weight by 15.5, 14.95 and 3.34%, respectively. Drought stress increased proline content by 115%. Also, in the irrigation withold from tillering stage, foliar application with selenium, silicon, ascorbic acid, and salicylic acid led to increase in floret fertility percentage and 1000-grain weight, thereby increasing the grain yield up to 32.6, 31.9, 35.3 and 33.3%, respectively, compared to no foliar application (control). In general, the results of this study showed that foliar application of phytoprotectants can reduce the adverse effects of drought stress and improve the grain yield of rice under drought stress conditions.
