Different cover promote sandy soil suppressiveness to root rot disease of cassava caused by Fusarium solani

Barros, Jamilly Alves de; Medeiros, Érika Valente de; Notaro, Krystal A.; Moraes, W.; Silva, JÃ©ssica M.; Nascimento, Talita Camila Evaristo da Silva; Moreira, Keila Aparecida

doi:10.5897/ajmr2014.6607

Cited by 24 publications

(6 citation statements)

References 24 publications

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“…The maize crop showed a higher rate of disease and colonization by pathogens on the cuttings, it is worth mentioning that maize cultivation is frequent in monoculture, generating an increase in the incidence of pathogen populations, and in the present study this situation was confirmed, corroborating the results found by Awoyemi et al, (2016) in which the intercropping of maize with cassava does not have management potential in the development of root rot. However, it differs from what was found by Barros et al, (2014) andDe Medeiros et al, (2019) who presented it as one of the possible plant covers that can influence soil suppression when intercropped with beans and cassava; however, the planting of this plant was for a long period, unlike what happened in the present study.…”

Section: Discussioncontrasting

confidence: 99%

“…Alternatively, the induction of suppressiveness is a promising strategy, given the positive results obtained in recent literature (Barros et al, 2014;Silva et al, 2017;De Medeiros et al, 2019). This suppressiveness of the soil consists of limiting the disease, because despite adequate conditions such as a susceptible plant, virulent pathogen and an environment that favors the development of the disease, the disease may not occur, but if it does, it would be less severe (Bettiol and Ghini 2005;Kinkel et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Effect of cover crops on the suppressiveness of root rot and on the agronomic characteristics of cassava

Sousa,

Diamantino,

Hohenfeld

et al. 2023

Preprint

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Cassava (Manihot esculenta Crantz) is a major staple food in many developing countries, including Brazil. However, it faces significant challenges from diseases like dry root rot (DRR) and black root rot (BRR) caused by soil-borne fungi. This study explores the use of cover crops to suppress these diseases and improve cassava's agronomic traits. Over four cultivation cycles, various cover crops were alternated with cassava varieties 'BRS Kiriris' (resistant) and 'BRS Formosa' (susceptible) in soil infested with DRR and BRR pathogens. In the 2nd cycle, only germination showed significant differences, but by the 4th cycle, various agronomic parameters, including fresh weight (FW.AP), dry weight (DW.AP) of the aerial part, fresh weight (FW.Root), dry weight (DW.Root) of the roots, and plant vigor, exhibited significant improvements. Cowpeas were identified as the most effective cover crop in disease reduction (ID%) and promoting healthier and taller cassava plants. Jack beans and peanuts also had positive effects on vigor, FW.AP, DW.AP, FW.root, and DW.root. In contrast, cover crops like maize, black oats, Crotalaria ochroleuca, cassava, and fallow soil had minimal impacts. Throughout the cycles, these selected cover crops consistently contributed to disease reduction and improved cassava's agronomic characteristics. This research highlights their potential in holistic disease management strategies.

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Section: Discussioncontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of cover crops on the suppressiveness of root rot and on the agronomic characteristics of cassava

Sousa,

Diamantino,

Hohenfeld

et al. 2023

Preprint

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“…solani is a harmful fungus that causes plant diseases and then affects plant growth and production. The cassava root rot has been responsible for major losses in cassava production, which is mainly caused by the fungi F. solani ( Barros et al, 2014 ; Boas et al, 2016 ). In contrast, the proportions of Chaetomium and Penicillium were gradually increased after CF application, which are beneficial fungi with biocontrol effect on many plant pathogens ( De Cal et al, 2008 ; Shanthiyaa et al, 2013 ).…”

Section: Discussionmentioning

confidence: 99%

Different Fertilizers Applied Alter Fungal Community Structure in Rhizospheric Soil of Cassava (Manihot esculenta Crantz) and Increase Crop Yield

et al. 2021

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Soil microbes play an important role in the ecosystem and have a relationship with plant growth, development, and production. There are only a few reports on the effects of planting patterns of cassava on the microbial community structure in the rhizospheric soil. Here, we investigated the effects of different fertilization on the microbial community structure in the cassava rhizospheric soil. SC205 cultivar was used in this study as the experimental material. Compound fertilizer (CF) and reduced fertilizer (RF) were applied to the soil prior to planting. Soil samples were collected before harvest, and fungi were analyzed using IonS5TMXL sequencing platform. Results showed that CF and RF treatments significantly increased cassava yield. Amplicon sequencing result indicated that the fungi richness in rhizospheric soil of cassava was increased after CF was applied, and the diversity was decreased. However, the fungal diversity and richness were decreased in rhizospheric soil after RF was applied. The most dominant fungal phylum was Ascomycota, which increased after fertilization. In addition, the abundance of beneficial fungi such as Chaetomium increased after fertilization, while that of pathogenic fungi such as Fusarium solani was decreased. The composition of the fungal community in rhizospheric soil with CF and RF applied was similar, but the richness and diversity of fungi were different. Canonical correspondence analysis (CCA) indicates there was a positive correlation between soil nutrition and fungal community structure. Overall, our results indicate that fertilization alters the fungal community structure of cassava rhizospheric soil, such that the abundance of potentially beneficial fungi increased, while that of potentially pathogenic fungi decreased, thereby significantly promoting plant growth and yield of cassava. Thus, during actual production, attention should be paid to maintain the stability of cassava rhizospheric soil micro-ecology.

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“…Diseases incited by soil-borne pathogens are a serious problem for agriculture due to the complexity of their interaction with the environment, difficult management and control 8 . Different management strategies have been reported for CRRD such as crop rotation, chemical control, soil disinfestation by water vapor, soil solarization, alternative controls by plant extracts and oils, and use of biological control agents 7 , 9 – 12 . However, the use of genetic resistance is considered the less expensive and most environmentally friendly method for cassava root rot disease management in the long term 13 – 16 .…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of infected cassava root transcriptomics reveals candidate genes for root rot disease resistance

Hohenfeld,

de Oliveira,

Ferreira

et al. 2024

Sci Rep

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Cassava root-rot incited by soil-borne pathogens is one of the major diseases that reduces root yield. Although the use of resistant cultivars is the most effective method of management, the genetic basis for root-rot resistance remains poorly understood. Therefore, our work analyzed the transcriptome of two contrasting genotypes (BRS Kiriris/resistant and BGM-1345/susceptible) using RNA-Seq to understand the molecular response and identify candidate genes for resistance. Cassava seedlings (resistant and susceptible to root-rot) were both planted in infested and sterilized soil and samples from Initial-time and Final-time periods, pooled. Two controls were used: (i) seedlings collected before planting in infested soil (absolute control) and, (ii) plants grown in sterilized soil (mock treatments). For the differentially expressed genes (DEGs) analysis 23.912 were expressed in the resistant genotype, where 10.307 were differentially expressed in the control treatment, 15 DEGs in the Initial Time-period and 366 DEGs in the Final Time-period. Eighteen candidate genes from the resistant genotype were related to plant defense, such as the MLP-like protein 31 and the peroxidase A2-like gene. This is the first model of resistance at the transcriptional level proposed for the cassava × root-rot pathosystem. Gene validation will contribute to screening for resistance of germplasm, segregating populations and/or use in gene editing in the pursuit to develop most promising cassava clones with resistance to root-rot.

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Different cover promote sandy soil suppressiveness to root rot disease of cassava caused by Fusarium solani

Cited by 24 publications

References 24 publications

Effect of cover crops on the suppressiveness of root rot and on the agronomic characteristics of cassava

Effect of cover crops on the suppressiveness of root rot and on the agronomic characteristics of cassava

Different Fertilizers Applied Alter Fungal Community Structure in Rhizospheric Soil of Cassava (Manihot esculenta Crantz) and Increase Crop Yield

Comparative analysis of infected cassava root transcriptomics reveals candidate genes for root rot disease resistance

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