Sclerotium rolfsii dynamics in soil as affected by crop sequences

Leoni, C.; Braak, Cajo J. F. ter; Gilsanz, J.C.; Dogliotti, Santiago; Rossing, W.A.H.; Bruggen, A.H.C. van

doi:10.1016/j.apsoil.2013.11.002

Cited by 10 publications

(7 citation statements)

References 33 publications

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“…S. rolfsii causes large economic losses by infecting several crop and ornamental plants, especially in tropical and subtropical regions. During infection, S. rolfsii produces oxalic acid as well as cellulolytic and pectinolytic enzymes (157,182). Although the genome of another necrotrophic basidiomycete, the white rot fungus H. irregulare, is already available, the genome of S. rolfsii or a related facultative pathogenic basidiomycete has yet to be sequenced to reveal the full genetic potential of phytopathogens for carbohydrate degradation.…”

Section: Hemicellulose-and Pectin-debranching Enzymesmentioning

confidence: 99%

“…Most of the characterized enzymes are from S. rolfsii, which has a dual life-style as a soil saprotroph and a necrotrophic crop pathogen with a wide host range including Ͼ500 plant species (157,182). S. rolfsii causes large economic losses by infecting several crop and ornamental plants, especially in tropical and subtropical regions.…”

Section: Hemicellulose-and Pectin-debranching Enzymesmentioning

confidence: 99%

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Plant-Polysaccharide-Degrading Enzymes from Basidiomycetes

Rytioja

Hildén

Yuzon

et al. 2014

Microbiol Mol Biol Rev

355

287

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SUMMARY Basidiomycete fungi subsist on various types of plant material in diverse environments, from living and dead trees and forest litter to crops and grasses and to decaying plant matter in soils. Due to the variation in their natural carbon sources, basidiomycetes have highly varied plant-polysaccharide-degrading capabilities. This topic is not as well studied for basidiomycetes as for ascomycete fungi, which are the main sources of knowledge on fungal plant polysaccharide degradation. Research on plant-biomass-decaying fungi has focused on isolating enzymes for current and future applications, such as for the production of fuels, the food industry, and waste treatment. More recently, genomic studies of basidiomycete fungi have provided a profound view of the plant-biomass-degrading potential of wood-rotting, litter-decomposing, plant-pathogenic, and ectomycorrhizal (ECM) basidiomycetes. This review summarizes the current knowledge on plant polysaccharide depolymerization by basidiomycete species from diverse habitats. In addition, these data are compared to those for the most broadly studied ascomycete genus, Aspergillus , to provide insight into specific features of basidiomycetes with respect to plant polysaccharide degradation.

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Section: Hemicellulose-and Pectin-debranching Enzymesmentioning

confidence: 99%

Section: Hemicellulose-and Pectin-debranching Enzymesmentioning

confidence: 99%

Plant-Polysaccharide-Degrading Enzymes from Basidiomycetes

Rytioja

Hildén

Yuzon

et al. 2014

Microbiol Mol Biol Rev

355

287

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show abstract

“…The above-mentioned technologies offer new opportunities to devise innovative tools for supporting the sustainable soil-borne disease management of leafy vegetables, increasing the farmers' monitoring capability to early identify outbreaks and apply a timely and spatially effective phytosanitary intervention, especially under continuous sequences in Mediterranean-type climate regions 30 . However, a basic computational study to filter the acquiring big data into more manageable synthetic hyperspectral indices is a decisive step to make the proposed digital tool exploitable in practical applications on crops with acceptable costs 31 .…”

Section: Introductionmentioning

confidence: 99%

Surveying soil-borne disease development on wild rocket salad crop by proximal sensing based on high-resolution hyperspectral features

Galieni¹,

Nicastro

Pentangelo

et al. 2022

Sci Rep

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Wild rocket (Diplotaxis tenuifolia, Brassicaceae) is a baby-leaf vegetable crop of high economic interest, used in ready-to-eat minimally processed salads, with an appreciated taste and nutraceutical features. Disease management is key to achieving the sustainability of the entire production chain in intensive systems, where synthetic fungicides are limited or not permitted. In this context, soil-borne pathologies, much feared by growers, are becoming a real emergency. Digital screening of green beds can be implemented in order to optimize the use of sustainable means. The current study used a high-resolution hyperspectral array (spectroscopy at 350–2500 nm) to attempt to follow the progression of symptoms of Rhizoctonia, Sclerotinia, and Sclerotium disease across four different severity levels. A Random Forest machine learning model reduced dimensions of the training big dataset allowing to compute de novo vegetation indices specifically informative about canopy decay caused by all basal pathogenic attacks. Their transferability was also tested on the canopy dataset, which was useful for assessing the health status of wild rocket plants. Indeed, the progression of symptoms associated with soil-borne pathogens is closely related to the reduction of leaf absorbance of the canopy in certain ranges of visible and shortwave infrared spectral regions sensitive to reduction of chlorophyll and other pigments as well as to modifications of water content and turgor.

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“…These sclerotia tolerate biological and chemical degradation due to their melanized cuticle, the disease is favored by moist soil with temperatures between 25 and 30 °C [4]. In addition, its prolific growth and ability to produce large numbers of sclerotia and its wide host range of about 500 plant species in over 100 plant families [5] make the control of this pathogen difficult. Control of this fungus, therefore, remains difficult and must be based on strategies that can reduce the primary inoculum in the soil or prevent infection of host plants.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Antagonistic Potential of Bacterial Strains Isolated from Moroccan Soils for the Biological Control of Sclerotium rolfsii Sacc.

Chtaina¹,

Ezzahiri²,

Guilli³

2021

IJFSA

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Sclerotium rolfsii Sacc. is a polyphagous fungus responsible for root rots of many cultivated crops. In Morocco, the fungus is responsible of important damages on sugar beet crop mainly in the Doukkala region. The aim of our study was to evaluate the antagonistic potential in vitro and in vivo of 191 bacterial isolates isolated from Moroccan soils and a bacterial strain from the laboratory collection Bacillus amyloliquefaciens referenced as I3, in the control of Sclerotium rolfsii. 14 of bacterial isolates showed antifungal activity against Sclerotium rolfsii. Isolates referenced as O4, E10 and E7 were the most efficient in vitro tests with an inhibition rate of the mycelial growth of Sclerotium rolfsii of 98.16%, 96.22% and 87.81%, respectively. The inhibition of sclerotia germination in soil by the bacterial suspensions varied from 85% to 95% for the aforementioned 3 isolates. The antifungal activity of the bacterial culture filtrates at proportions [1/2]; [1/3]; [1/4]; [1/10] ([Filtrate Volume /PDA Volume]) showed the ability of these bacteria to produce secondary metabolites capable of inhibiting Sclerotium rolfsii mycelial growth and sclerotia germination with inhibition percentages ranging from 30. 62% to 98.93% for mycelial inhibition and from 44.69% to 98.75% for sclerotia inhibition for isolate O4. The in vivo tests were performed by bacterization of seeds and the evaluation was done on 15 days old chickpea seedlings, statistical analysis revealed a very highly significant difference (p<0.05) between the isolates. Disease incidence was 7.5% with the T-O4 bacterized seeds and disease severity 30 days after inoculation was 20% for the most effective T-O4 treatment while the T control treatment had a severity of 89%. The isolates, isolated from Moroccan soils have shown their ability to inhibit Sclerotium rolfsii especially isolates O4 and E10.

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Sclerotium rolfsii dynamics in soil as affected by crop sequences

Cited by 10 publications

References 33 publications

Plant-Polysaccharide-Degrading Enzymes from Basidiomycetes

Plant-Polysaccharide-Degrading Enzymes from Basidiomycetes

Surveying soil-borne disease development on wild rocket salad crop by proximal sensing based on high-resolution hyperspectral features

Evaluation of the Antagonistic Potential of Bacterial Strains Isolated from Moroccan Soils for the Biological Control of Sclerotium rolfsii Sacc.

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