The effect of the incidence of cassava anthracnose disease (CAD) on the performance and yield of cassava cultivars

Obilo, OP; Ikotun, B.; Ihejirika, G. O.; Ibeawuchi, II; Oben, T.T.

doi:10.1016/j.cropro.2009.11.009

Cited by 10 publications

(2 citation statements)

References 8 publications

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“…In contrast, some fungi are plant pathogens ( Boas et al, 2016 ; Braganca et al, 2016 ). For example, anthracnose, caused by Colletotrichum , is a devastating soil-borne disease of cassava that seriously affects the growth and yield of cassava ( Obilo et al, 2010 ). These findings indicate that changes in fungal community structure correlate with fertilization.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…The disease is characterized by shoot tip-die-backs, cankers on stems and branches and leaf spots [6]. The infected stems become weak and break easily during strong winds [7].…”

Section: Introductionmentioning

confidence: 99%

Overexpression of rice thaumatin-like protein ( Ostlp ) gene in transgenic cassava results in enhanced tolerance to Colletotrichum gloeosporioides f. sp. manihotis

Ojola

Nyaboga

Njiru

et al. 2018

Journal of Genetic Engineering and Biotechnology

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Cassava (Manihot esculenta Crantz) is the most important staple food for more than 300 million people in Africa, and anthracnose disease caused by Colletotrichum gloeosporioides f. sp. manihotis is the most destructive fungal disease affecting cassava production in sub-Saharan Africa. The main objective of this study was to improve anthracnose resistance in cassava through genetic engineering. Transgenic cassava plants harbouring rice thaumatin-like protein (Ostlp) gene, driven by the constitutive CaMV35S promoter, were generated using Agrobacterium-mediated transformation of friable embryogenic calli (FEC) of cultivar TMS 60444. Molecular analysis confirmed the presence, integration, copy number of the transgene all the independent transgenic events. Semi-quantitative RT-PCR confirmed high expression levels of Ostlp in six transgenic lines tested. The antifungal activity of the transgene against Colletotrichum gloeosporioides pathogen was evaluated using the leaves and stem cuttings bioassay. The results demonstrated significantly delayed disease development and reduced size of necrotic lesions in leaves and stem cuttings of all transgenic lines compared to the leaves and stem cuttingss of non-transgenic control plants. Therefore, constitutive overexpression of rice thaumatin-like protein in transgenic cassava confers enhanced tolerance to the fungal pathogen C. gloeosporioides f. sp. manihotis. These results can therefore serve as an initial step towards genetic engineering of farmer-preffered cassava cultivars for resistance to anthracnose disease.

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Impact of Concurrent Weed or Herbicide Stress with Other Biotic and Abiotic Stressors on Crop Production

Bagavathiannan

Singh

Govindasamy

et al. 2017

Plant Tolerance to Individual and Concurrent Stresses

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The effect of the incidence of cassava anthracnose disease (CAD) on the performance and yield of cassava cultivars

Cited by 10 publications

References 8 publications

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

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

Overexpression of rice thaumatin-like protein ( Ostlp ) gene in transgenic cassava results in enhanced tolerance to Colletotrichum gloeosporioides f. sp. manihotis

Impact of Concurrent Weed or Herbicide Stress with Other Biotic and Abiotic Stressors on Crop Production

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