Oxidative Status and Antioxidative Response to Fusarium Attack and Different Nitrogen Levels in Winter Wheat Varieties

Matić, Magdalena; Vuković, Rosemary; Vrandečić, Karolina; Čamagajevac, Ivna Štolfa; Ćosić, Jasenka; Vuković, Ana; Sabljić, Kristina; Sabo, Nikolina; Dvojković, Krešimir; Novoselović, Dario

doi:10.3390/plants10040611

Cited by 12 publications

(9 citation statements)

References 45 publications

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“…Reasonable application reduces occurrence of FHB in wheat by influencing canopy characteristics and plant physiology (Hofer et al, 2016). In contrast, high nitrogen availability decreased the activity of antioxidative enzymes, and may thus increase the incidence and intensity of FHB (Matić et al, 2021). In our study, (NH 4 )SO 2 , as the sole nitrogen resource, enhanced mycelium growth and conidia germination Mycelial growth of F. avenaceum Charlie 779 on PDA plates incubated for 7 days in the absence (CK) or presence of different concentrations of propiconazole (A1: 100 µg/mL, A2: 50 µg/mL, A3: 10 µg/mL, A4: 5 µg/mL, A5: 1 µg/mL, A6: CK), myclobutanil (B1: 100 µg/mL, B2: 50 µg/mL, B3: 10 µg/mL, B4: 5 µg/mL, B5: 1 µg/mL, B6: CK), pyrimethanil (C1: 1000 µg/mL, C2: 500 µg/mL, C3: 250 µg/mL, C4: 125 µg/mL, C5: 62.5 µg/mL, C6: CK), thiram (D1: 500 µg/mL, D2: 300 µg/mL, D3: 150 µg/mL, D4: 30 µg/mL, D5: 15 µg/mL, D6: CK), mancozeb (E1: 300 µg/mL, E2: 100 µg/mL, E3: 50 µg/mL, E4: 25 µg/mL, E5: 12.5 µg/mL, E6: CK), carbendazim (F1: 6 µg/mL, F2: 3 µg/mL, F3: 1.5 µg/mL F4: 0.75 µg/mL, F5: 0.38 µg/mL, F6: CK), and hymexazol (G1: 200 µg/mL, G2: 100 µg/mL, G3: 50 µg/mL, G4: 25 µg/mL, G5: 12.5 µg/mL, G6: CK).…”

Section: Discussionmentioning

confidence: 99%

Biological characterization and in vitro fungicide screenings of a new causal agent of wheat Fusarium head blight in Tibet, China

et al. 2022

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Wheat (Triticum aestivum L.) is an important cereal crop, widely grown throughout the temperate zones, and also suitable for cultivation at higher elevations. Fusarium head blight (FHB) is a highly destructive disease of wheat throughout the globe. In July 2020, serious wheat FHB symptoms were observed in open fields located in Linzhi City, southeast of Tibet, China. The causal agent was identified as Fusarium avenaceum (Fr.) Sacc. by amplification and sequencing of the internal transcribed spacer (ITS) region, translation elongation factor 1-alpha (EF-1α) gene, and RNA polymerase II subunit (RPB-2) gene, as well as by morphological characterization. Koch’s postulates were confirmed by a pathogenicity test on healthy spikes, including re-isolation and identification. To our knowledge, this is the first report of F. avenaceum causing FHB on wheat in Tibet, China. Moreover, to determine pathogen characteristics that may be useful for future disease management, the utilization of different carbon and nitrogen resources, temperature, light, and ultraviolet (UV) irradiation on mycelium growth and conidia germination were studied. Soluble starch and peptone were the best carbon, and nitrogen source for the pathogen respectively. The optimal temperatures for the pathogen’s mycelium growth and conidia germination were 15–20°C, matching the average temperature during the growing season in Linzhi (Tibet). Meanwhile, alternating 8-h light and 16-h dark was shown to be conducive to mycelia growth, and complete darkness facilitated conidia germination. In addition, UV Irradiation of 48 MJ/cm2, approximately 100 times of the local condition, did not inhibit the germination of conidia. Furthermore, in vitro screening of effective fungicides was conducted. Among the seven tested pesticides, carbendazim showed the best inhibition rate, with an EC50 (concentration for 50% of maximal effect) value of 2.1 mg/L. Propiconazole also showed sufficient inhibitory effects against F. avenaceum, with an EC50 value of 2.6 mg/L. The study provides insights into the newly identified causal agent of wheat FHB in Tibet, China, as well as first pathogen characteristics and promising candidate substances for its management.

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Section: Discussionmentioning

confidence: 99%

Biological characterization and in vitro fungicide screenings of a new causal agent of wheat Fusarium head blight in Tibet, China

et al. 2022

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“…Local and regional environment factors also contribute to the dynamic of Fusarium infections [3]. The impact of FHB as well as defense strategies can vary significantly between different wheat varieties and due to specific growth conditions and/or agricultural practices [42,43]. Therefore, the severity and impact of the disease may differ for particular wheat variety if it is exposed to different environmental conditions.…”

Section: Discussionmentioning

confidence: 99%

“…The aim of this study was to provide a better understanding of the response of the photosynthetic apparatus of different winter wheat varieties to Fusarium infection and to explore the possible role of FHB-induced changes in photosynthetic efficiency in overall disease outcome. Since the impact of FHB as well as defense strategies can vary significantly between different wheat varieties and due to specific growth conditions and/or agricultural practices [42,43], the evaluation of dynamic of FHB-induced changes in photosynthetic efficiency was performed at two different locations.…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic Efficiency in Flag Leaves and Ears of Winter Wheat during Fusarium Head Blight Infection

et al. 2021

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Fusarium head blight (FHB) is one of the most serious fungal diseases of wheat (Triticum aestivum L.). It causes major reduction of grain yield and quality, while the safety of wheat products is at risk due to mycotoxin contaminations. To contribute to a better understanding of mechanisms governing more efficient defense strategies against FHB, an evaluation of photosynthetic efficiency was performed during different phases of infection, i.e., before visual symptoms occur, at the onset and after the development of disease symptoms. Six different winter wheat varieties were artificially inoculated with the most significant causal agents of FHB (Fusarium graminearum and F. culmorum) at two different locations. Photosynthetic efficiency was assessed in flag leaves and ears of inoculated and untreated (control) plants based on measurements of chlorophyll a fluorescence rise kinetics and the calculation of JIP-test parameters. Obtained results indicate that the response of wheat to Fusarium infection includes changes in photosynthetic efficiency which can encompass alternating reductions and increases in photosynthetic performance during the course of the infection in both flag leaves and ears. FHB-induced photosynthetic adjustments were shown to be somewhat variety-specific, but location was shown to be a more significant factor in modulating the response of wheat to Fusarium infection. Changes in chlorophyll a fluorescence rise kinetics could be detected prior to visible symptoms of the disease. Therefore, this method could be applied for the early detection of Fusarium infection, particularly the analysis of L-band appearance, which showed a similar response in all inoculated plants, regardless of variety or location.

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“…These were different from the LT-N treatment. These differences may result from the fact that the enhanced nitrogen level in the soils caused by increased N supply and the enzymatic defense mechanisms in plants were earlier induced when the wheat plants were subject to stress [41], which helped the plants cope with low-temperature constraints.…”

Section: Changes In Nitrogen Uptake and Utilization With Remedial Fer...mentioning

confidence: 99%

Morphology and Nitrogen Uptake and Distribution of Wheat Plants as Influenced by Applying Remedial Urea Prior to or Post Low-Temperature Stress at Seedling Stage

Liu

Dai

et al. 2022

Agronomy

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Wheat production is dramatically influenced by temperature. Low-temperature stress that frequently occurs seriously hampers the growth and development of wheat seedlings. In order to alleviate the damage of low temperature to wheat plant growth, remedial nitrogen was applied prior to or post low-temperature stress at seedling stage using controlled-temperature incubators to explore the difference in wheat morphology and nitrogen absorption and utilization efficiency. Nitrogen amendment significantly increased the leaf area, seedling height, tiller number and dry matter weight of wheat plants as compared with the treatment without nitrogen amendment under temperature stress. Remedial nitrogen applied prior to low-temperature stress (N-LT) was more conducive to increase the above parameters than that applied post low-temperature stress (LT-N). In addition, N-LT enhanced the ability of roots to absorb remedial 15N urea, promoted the growth and development of wheat plants under low-temperature stress, resulting in higher leaf SPAD readings, more new tillers, as well as increased dry weight of roots and above-ground organs. This study suggested that remedial nitrogen should be applied prior to low-temperature stress because it is more effective in restoring the growth of wheat plants under low-temperature stress.

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Oxidative Status and Antioxidative Response to Fusarium Attack and Different Nitrogen Levels in Winter Wheat Varieties

Cited by 12 publications

References 45 publications

Biological characterization and in vitro fungicide screenings of a new causal agent of wheat Fusarium head blight in Tibet, China

Biological characterization and in vitro fungicide screenings of a new causal agent of wheat Fusarium head blight in Tibet, China

Photosynthetic Efficiency in Flag Leaves and Ears of Winter Wheat during Fusarium Head Blight Infection

Morphology and Nitrogen Uptake and Distribution of Wheat Plants as Influenced by Applying Remedial Urea Prior to or Post Low-Temperature Stress at Seedling Stage

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