Effect of potassium sulfate on the physiological characteristics of canola cultivars in late season drought stress conditions

Farahani, Soheila; Shahsavari, Nasser; Arasteh, Morteza Mohammadi

doi:10.1080/01904167.2020.1727507

Cited by 9 publications

(3 citation statements)

References 22 publications

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“…In addition, S facilitates the transport of the photosynthetic products in garlic plants to the belowground components and promotes the synthesis of proteins (Chandra and Pandey, 2013;Cheng et al, 2015). Previous studies reported the application of K 2 SO 4 fertilizer not only increased yields, but also improved the vegetable quality in contrast to KCl fertilizer (Farahani et al, 2020;Kumar and Kumar, 2008). In this study, when compared with KCl fertilizer, the economic benefits of the application of K 2 SO 4 fertilizer increased by 12.8% to 21.5% at the Pingcheng site, and increased by 2.1% to 2.3% at the Peicundian site when comparing the same K fertilization regime (Table 3).…”

Section: Discussionmentioning

confidence: 96%

Responses of Garlic Quality and Yields to Various Types and Rates of Potassium Fertilizer Applications

Wang

Chu

et al. 2022

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Potassium (K) is a critical plant nutrient that determines quality in a myriad of crops and increases production yields. However, excessive application of various types of K fertilizers can decrease both the food quality and yields, which translates as economic losses and food safety issues. The objectives of this study were to 1) elucidate the impacts of different application rates of various K fertilizers on garlic, with the aim to identify the optimal and most economical K fertilizer dosage and 2) compare the effects of applying two common K fertilizers (KCl and K2SO4) on garlic, to determine the optimal combination. From 2018 to 2020, we utilized two distinct K-fertilized fields to conduct our experiments. The results revealed optimal KCl fertilization increased the biomass and vegetation index in garlic, and promoted the transfer of nitrogen, phosphorus, and potassium nutrients from the stem and leaf to bulb, thereby increasing bulb production. The application of KCl fertilizer increased the number of cloves, the diameters of the cloves and bulbs, and reduced variations in bulb size. In addition, the application of KCl fertilizer improved the nutritional quality (Vitamin C, soluble sugar, soluble protein, and allicin) of the garlic and reduced the accumulation of nitrate. However, excessive KCl fertilizer cause decreased yields, appearance traits, and nutritional quality. Applying the same rate of K fertilizer in the form of K2SO4 in isolation increased the garlic yield by only 0.1% to 22.5% when compared with KCl fertilizer. However, the results were not always significant. In this study, the highest yields, appearance traits, and nutritional quality were achieved with the ratio of K2SO4: KCl = 3:1. Consequently, to ensure the highest economic value (considering the market prices of K fertilizer, garlic sprouts, and bulbs), the authors recommend a K fertilizer rate of 252.5 kg·ha−1 K2O, with K2SO4 accounting for 61.6% for garlic production in field.

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Section: Discussionmentioning

confidence: 96%

Responses of Garlic Quality and Yields to Various Types and Rates of Potassium Fertilizer Applications

Wang

Chu

et al. 2022

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“…Contrarily, K application significantly increased the accumulation of SS and FAA ( Figures 2A, C ) in well-watered plants as compared with K0 probably due to increased partitioning of stored carbon reserves ( Wang et al., 2012 ) and increased SP degradation ( Hu et al., 2016b ) and, consequently, resulted in lower SP content under K1 and K2 treatments ( Figure 2D ). The SP, FAA, and Pro exhibited a significant positive correlation with the RWC, chlorophyll a , and chlorophyll b ( Figure 6 ), which suggested that increased osmolyte accumulation was favorable for reducing oxidative stress, thus enhancing RWC and delaying senescence ( Farahani et al., 2020 ; Matłok et al., 2022 ). Researchers claimed that SS and Pro are the primary osmotic adjustment substances exposed to moderate drought stress, but the ability of osmoregulation was suppressed as drought stress was prolonged ( Hessini et al., 2009 ).…”

Section: Discussionmentioning

confidence: 98%

“…Drought-stressed plants showed wilting symptoms with the stems turning thinner and weaker and the leaves becoming soft and prolapsed, which were alleviated by K application ( Figure 1A ). Plant water relations are primarily determined by several physiological traits including leaf relative water content, which is an efficient factor to evaluate the continuous growth of crops under drought stress status ( Farahani et al., 2020 ). In our studies, the RWC in DS plants was decreased by 11.1% as compared with WW plants, while K application alleviated this reduction ( Figure 1B ), with the lowest reduction (7.2%) observed under K2, which was consistent with the results of Aksu and Altay (2020) who showed that prolonged drought significantly reduced the RWC in the leaves and the application of potassium decreased the magnitude of decline.…”

Section: Discussionmentioning

confidence: 99%

Potassium application enhances drought tolerance in sesame by mitigating oxidative damage and regulating osmotic adjustment

et al. 2022

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Potassium (K) is known for alleviating the negative effects of abiotic stresses on plants. To explore the functions of K in controlling reactive oxygen species (ROS), antioxidant activities, and osmoregulation in sesame under drought stress, a pot experiment was conducted with three K levels (0, 60, and 120 kg ha–1, recorded as K0, K1, and K2, respectively) and exposed to well-watered (WW, 75% ± 5% soil relative water content) and drought-stressed (DS, 50% ± 5% soil relative water content) conditions. The results showed that DS stimulated the production of ROS such as increased hydrogen peroxide (H2O2), leading to lipid peroxidation as characterized by higher malondialdehyde (MDA) and, consequently, resulting in the decline in relative water content (RWC) and photosynthetic pigments as compared with WW plants. These adverse effects were exacerbated when drought stress was prolonged. Concurrently, K application alleviated the magnitude of decline in the RWC, chlorophyll a, and chlorophyll b, and plants applied with K exhibited superior growth, with the optimal mitigation observed under K2 treatment. Additionally, DS plants treated with K exhibited lower lipid peroxidation, higher antioxidant activities, and increased osmotic solute accumulation in comparison with plants under K deficiency, which suggested that exogenous K application mitigated the oxidative damages and this was more prominent under K2 treatment. Noteworthily, proline and soluble protein, respectively, dominated in the osmotic regulation at 3 and 6 days of drought stress according to the analysis of the quantitative comparison among different osmotically active solutes. Based on the correlation of the aforementioned traits and the analysis of variance on the interaction effects of drought stress and potassium, we propose that superoxide dismutase (SOD), glutathione reductase (GR), and MDA could be critical indicators in balancing ROS detoxification and reproduction. In summary, our studies suggest that optimized K application keeps a balance between the production of antioxidants and ROS and simultaneously affects osmoregulation to alleviate the damage from drought stress.

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Effect of Late-Season Drought Stress and Foliar Application of ZnSO4 and MnSO4 on the Yield and Some Oil Characteristics of Rapeseed Cultivars

Khodabin

Tahmasebi‐Sarvestani

Rad

et al. 2021

J Soil Sci Plant Nutr

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Effect of potassium sulfate on the physiological characteristics of canola cultivars in late season drought stress conditions

Cited by 9 publications

References 22 publications

Responses of Garlic Quality and Yields to Various Types and Rates of Potassium Fertilizer Applications

Responses of Garlic Quality and Yields to Various Types and Rates of Potassium Fertilizer Applications

Potassium application enhances drought tolerance in sesame by mitigating oxidative damage and regulating osmotic adjustment

Effect of Late-Season Drought Stress and Foliar Application of ZnSO4 and MnSO4 on the Yield and Some Oil Characteristics of Rapeseed Cultivars

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