Priming to protect maize from <i>Fusarium verticillioides</i> and its fumonisin accumulation

Aguado, Ana M.; Savoie, Jean‐Michel; Chéreau, Sylvain; Ducos, Christine; Aguilar, María de Lourdes Romo; Ferrer, Nathalie; Aguilar, Manuel Jiménez; Pinson‐Gadais, Laëtitia; Richard‐Forget, Florence

doi:10.1002/jsfa.9142

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…Priming is known to activate systemic defense responses only when the plant is challenged by a pathogen or is exposed to abiotic stress (Aranega-Bou et al, 2014). Since natural or synthetic chemicals and infection by pathogens can induce priming effects in plants (Aguado et al, 2019;Westman et al, 2019;De Vega et al, 2021), we hypothesize that the greater positive effect observed with the use of Sedaxane alone, and to a greater extent when in combination with Fludioxonil and Metalaxil-M and in the presence of R. solani could be ascribed to a plant response related to priming. While this hypothesis requires further investigation to clarify the possible involved mechanisms, Sedaxane in combination with Fludioxonil and Metalaxyl-M can be agronomically exploited in a dicot species such as oilseed rape to control Rhizoctonia.…”

Section: Leaf Areamentioning

confidence: 99%

Early morpho-physiological response of oilseed rape under seed applied Sedaxane fungicide and Rhizoctonia solani pressure

Panozzo

Barion²,

Moore³

et al. 2023

Front. Plant Sci.

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The SDHI fungicide Sedaxane has shown to efficiently control Rhizoctonia spp. growth and to possess biostimulant properties in cereal crops. As a first, the present study investigated its effectiveness as a seed treatment of the dicot species oilseed rape (Brassica napus var. oleifera). For this, seeds were treated with different fungicides: (i) the conventionally used active ingredient Thiram, (ii) Sedaxane, or (iii) Sedaxane in combination with Fludioxonil and Metalaxyl-M, and later sown in soil inoculated with Rhizoctonia solani. The resulting shoot and root growth from the treated seeds were recorded in early growth stages and the presence of Rhizoctonia DNA in the basal stem tissue was quantified. Here we demonstrate that all the fungicide treatments were effective in greatly reducing the presence of Rhizoctonia DNA, with Thiram confirming to have high fungicidal effects. Following seed treatment, shoot and root growth at the 2-leaf stage was reduced regardless of inoculation, indicating that the fungicides became phytotoxic, with particular respect to Thiram. In seedlings grown in inoculated soil, significant biostimulation of the roots was observed at the 4-leaf stage of treatments containing both Sedaxane alone and in a mixture. Leaf area was stimulated in control soil not inoculated with Rhizoctonia, likely due to improved PSII efficiency, stomatal conductance, and CO2 assimilation rate. Young oilseed rape seedlings are thus highly sensitive to seed treatments with these fungicides, and in particular to Thiram. The retardation in growth is quickly overcome by the 4-leaf stage however. We confirm that Sedaxane indeed possesses root biostimulant properties in oilseed rape, which are enhanced in combination with other fungicides. Such biostimulating properties impose its greatest effects under conditions of biotic stress.

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Section: Leaf Areamentioning

confidence: 99%

Early morpho-physiological response of oilseed rape under seed applied Sedaxane fungicide and Rhizoctonia solani pressure

Panozzo

Barion²,

Moore³

et al. 2023

Front. Plant Sci.

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“…A study in 2019 showed that, although the fungicides procymidone and iprodione triadimenol are effective in protecting seedlings, they also possess phytotoxic effects, leading to a delay in seed germination and a reduction in the developmental speed of Allium cepa seedlings [52]. In addition to using highquality seeds, the use of fungicides to achieve high yields is a widespread agricultural practice [53][54][55][56]. The chemical treatment of seeds is one of the most effective methods of controlling both fungi and insects [37].…”

Section: Seed Disinfectionmentioning

confidence: 99%

Germination of Triticum aestivum L.: Effects of Soil–Seed Interaction on the Growth of Seedlings

Chaichi¹,

Nemati²,

Dadrasi

et al. 2022

Soil Systems

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Seed size, sowing depth, and seed disinfection can affect seed germination and seedling establishment, which, in turn, can directly affect crop growth and yield. The current study was comprised of two experiments, the first of which was conducted in the laboratory, and a second which was performed under glasshouse conditions. The objective of these experiments was to investigate the effects of seed size, sowing depth, and seed disinfection on seed germination and initial seedling growth of selected wheat (Triticum aestivum L.) cultivars. The treatments in laboratory experiment were arranged in a completely randomized design, which included: (Ι) four wheat cultivars (Pishgam, Haydari, Soissons, and Mihan), (ΙΙ) two seed size classes (x < 2.25 mm, and x > 2.25 mm), and two disinfection treatments (no-disinfection and disinfection), (ΙΙΙ) with five replicates. In addition to the aforementioned treatments, the effect of planting depth (4, 6, and 8 cm) was also investigated in the subsequent glasshouse experiment. The best results were obtained at a sowing depth of 4 cm, in the non-disinfected treatment, using large seeds. In contrast, the lowest percentage and speed of seed germination and vigor index were observed in seeds sown at 8 cm depth, in the disinfected seed treatment, using small seeds. Large seeds contain larger nutrient stores which may improve seed germination indices, which would therefore result in improved percentage and speed of seed germination, followed by faster coleoptile and seedling growth, higher seedling dry weight and seed vigor. These data also illustrated that seed disinfection in the Pishgam and Haydari cultivars had inhibitory effects upon coleoptile growth and seedling length, which could be related to the fungicide’s chemical composition. Unlike other cultivars, disinfection did not show a significant effect on the Soissons cultivar. Based on our data, in order to improve both the speed of wheat seed germination and subsequent plant growth and development; it is necessary to select high-quality, large seeds, planted at a specific planting depth, which have been treated with an effective disinfectant; all of which will be specific for the wheat cultivar in question. Overall, the current study has provided useful information on the effect size seed, sowing depth, and disinfection have upon germination characteristics and seedling growth of wheat cultivars, which can form the basis for future field scale trails.

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“…Seed treatments with pesticides can neutralize potentially harmful infections (Ergin et al 2021). On the other hand, effective and sustainable alternative treatments need to be developed since the use of most chemical fungicides has been banned by the EU (Aguado et al 2019). Pre-sowing seed treatment is an important alternative method that promotes rapid and uniform germination but prevents radicle protrusion from the seed coat (Sher et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Boron seed treatments induce germination and seedling growth by reducing seed-borne pathogens in safflower ( Carthamus tinctorius L.)

2023

Journal of Plant Protection Research

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The objective of this study was to determine the effects of seed treatments with boron on germination, seedling growth, and disinfection of seed-borne pathogens in safflower. Safflower seeds of the Balcı cultivar were treated with solutions of 0, 5, 10, and 20 ppm boron for 6 hours or surface treated with powdery sodium borate (Na 2 B 8 O 13 .4H 2 O). The experiment was a completely randomized design with eight replications and 25 seeds per replicate. Treated or untreated seeds were germinated between papers and germination characteristics, emergence, seedling growth, and infected seed rate were investigated. The results showed that the peak germination percentage (96.5%) was achieved in seeds primed with 5 ppm B. The mean germination time was significantly reduced, and the germination index reached the maximum value (23.5) in seeds primed with 5 ppm boron. Emergence percentage improved from 76.5% in the control to 87.5% in the seed dressing. The root and shoot length of the primed seeds increased fourfold. Seedling fresh weight was positively affected by the boron treatments, and seeds primed with 20 ppm boron produced the heaviest fresh seedlings. All boron treatments significantly reduced the infection rate by about 73%, but the lowest infection rate (11.5%) was observed in seeds primed with 5 ppm boron. It was concluded that safflower seeds should be primed with 5-10 ppm boron or at least undergo seed dressing with boron to reduce the negative effects of seed-borne pathogens and promote germination and seedling growth.

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Priming to protect maize from Fusarium verticillioides and its fumonisin accumulation

Cited by 7 publications

References 35 publications

Early morpho-physiological response of oilseed rape under seed applied Sedaxane fungicide and Rhizoctonia solani pressure

Early morpho-physiological response of oilseed rape under seed applied Sedaxane fungicide and Rhizoctonia solani pressure

Germination of Triticum aestivum L.: Effects of Soil–Seed Interaction on the Growth of Seedlings

Boron seed treatments induce germination and seedling growth by reducing seed-borne pathogens in safflower ( Carthamus tinctorius L.)

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