First report of cassava leaf blight caused by Rhizoctonia solani AG-1 IA

Siviero, Amauri; Macedo, P. E. F. de; Moreira, Giovanna T. S.; Nechet, K. de L.; Coelho, Regina Melo Sartori; Halfeld-Vieira, Bernardo A.

doi:10.1007/s13314-019-0356-3

Cited by 4 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…solani symptoms can be observed mainly on roots and stems but also on leaves [ 24 ]. This fungus penetrates the leaf intercellular spaces through natural openings, such as stomata, and can infect crops, such as rice [ 25 , 26 ], turnip green [ 27 ], oil palm [ 28 ], and cassava [ 29 ]. In pepper, the main symptoms caused by R .…”

Section: Introductionmentioning

confidence: 99%

Systemic biochemical changes in pepper (Capsicum annuum L.) against Rhizoctonia solani by kale (Brassica oleracea var. acephala L.) green manure application

Rodríguez,

Velasco,

Cartea

et al. 2023

BMC Plant Biol

View full text Add to dashboard Cite

Background In the search for new alternatives to avoid the problems associated with the use of synthetic chemical fungicides in agriculture, the use of green manure (GrM) could help combat fungal diseases of crops, such as those produced by the necrotrophic pathogen Rhizoctonia solani. In the case of the use of Brassica tissues as GrM, it could have an elicitor capacity for systemic plant resistance. Results We used kale leaves as a GrM and applied it to pepper plants infected with R. solani. The application of freeze-dried kale tissues to the roots of pepper plants produced a systemic activation of foliar defences via the salicylic acid (SA) and ethylene (ET) pathways, significantly reducing pathogen damage. In addition, this systemic response led to the accumulation of secondary defence metabolites, such as pipecolic acid, hydroxycoumarin and gluconic acid, in leaves. Remarkably, pepper plants treated with lyophilised kale GrM accumulated glucosinolates when infected with R. solani. We also confirmed that autoclaving removed part of the glucobrassicin (85%) and sinigrin (19%) content of the kale tissues. Conclusions GrM kale tissues can activate systemic defences in bell pepper against foliar pathogens through SA/ET hormonal pathways, accumulating secondary defence metabolites.

show abstract

Section: Introductionmentioning

confidence: 99%

Systemic biochemical changes in pepper (Capsicum annuum L.) against Rhizoctonia solani by kale (Brassica oleracea var. acephala L.) green manure application

Rodríguez,

Velasco,

Cartea

et al. 2023

BMC Plant Biol

View full text Add to dashboard Cite

show abstract

“…In adult plants, R. solani symptoms can be observed mainly on roots and stem, but also on leaves [24]. The fungus penetrates the leaf intercellular spaces through natural openings, such as stomata, and can infect the tissues of crops such as rice [25,26], turnip green [27], oil palm [28], or cassava [29]. In pepper, the main symptoms caused by R. solani are seedling damping-off, root and stem rot, and hypocotyl with necrotic spots [30,31].…”

Section: Introductionmentioning

confidence: 99%

Systemic biochemical changes in pepper (Capsicum annuum L.) against Rhizoctonia solani by kale (Brassica oleracea var. acephala L.) green manure application

Rodríguez

Velasco

Cartea

et al. 2023

Preprint

View full text Add to dashboard Cite

Background In the search for new alternatives to avoid the problems associated with the use of chemical fungicides in agriculture, the use of green manure (GrM) could help to combat fungal diseases of crops, such as those produced by the necrotrophic pathogen Rhizoctonia solani. In the case of the use of brassica-tissues as GrM, could have an elicitor capacity of systemic plant resistance. Results We used kale-leaves as GrM and applied to pepper plants infected with R. solani. Application of freeze-dried kale-tissues to roots of pepper plants produced a systemic activation of foliar defenses via the salicylic acid (SA) and ethylene (ET) pathways, significantly reducing pathogen damage. In addition, this systemic response led to the accumulation of secondary defense metabolites in leaves, such as pipecolic acid, hydroxycoumarin or gluconic acid, among others. Remarkably, pepper plants treated with lyophilized kale-GrM accumulate glucosinolates when infected with R. solani. We also confirm that autoclaving removed part of the glucobrassicin (GBS) (85%) and sinigrin (19%) content of the kale-tissues. Conclusions GrM kale-tissues are able to activate systemic defenses in bell pepper against foliar pathogens through SA/ET hormonal pathways, accumulating secondary defense metabolites.

show abstract

“…Tester isolates were obtained from the Culture Collection of Microorganisms of Environmental and Agricultural Importance (CMAA) at Embrapa Meio Ambiente, Jaguariúna, São Paulo, Brazil, and grown on PDA in the dark at 25 °C for 48 h (Siviero et al 2019). After this period, a disc of mycelia from an AG tester was transferred to the extremity of a sterilised microscope slide containing a thin layer of 2% agar-water.…”

mentioning

confidence: 99%

First report of Rhizoctonia solani AG1- IA infecting yard-long bean

Quadros

Boari²,

Kauffmann

et al. 2021

Australasian Plant Dis. Notes

Self Cite

View full text Add to dashboard Cite

During March 2016, leaf blight, followed by death, was observed on yard-long bean plants (Vigna unguiculata subsp. sesquipedalis) in Brazil. Based on morphological characteristics and phylogenetic analysis, the pathogen was identified as Rhizoctonia solani AG-1 IA. Koch's postulates were fulfilled. All accessions studied were classified as susceptible. This is the first report of Rhizoctonia solani AG1-IA infecting yard-long bean.

show abstract

First report of cassava leaf blight caused by Rhizoctonia solani AG-1 IA

Cited by 4 publications

References 7 publications

Systemic biochemical changes in pepper (Capsicum annuum L.) against Rhizoctonia solani by kale (Brassica oleracea var. acephala L.) green manure application

Systemic biochemical changes in pepper (Capsicum annuum L.) against Rhizoctonia solani by kale (Brassica oleracea var. acephala L.) green manure application

Systemic biochemical changes in pepper (Capsicum annuum L.) against Rhizoctonia solani by kale (Brassica oleracea var. acephala L.) green manure application

First report of Rhizoctonia solani AG1- IA infecting yard-long bean

Contact Info

Product

Resources

About