Striga hermonthica: A highly destructive pathogen in maize production

David, Oluchi Glory; Odhiambo, Jude J. O.; Babalola, Olubukola Oluranti

doi:10.1016/j.envc.2022.100590

Cited by 21 publications

(15 citation statements)

References 125 publications

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“…Reduce the occurrence of Striga infestation. (Babalola et al, 2007;Babalola and Odhiambo, 2008;Nzioki et al, 2016;Jamil et al, 2021;David et al, 2022) Pseudomonas During a screen house trial, four PGPR inhibited Striga infestation in sorghum, and the strain Bacillus subtilis GBO3 resulted in the death of 35%-59% of Striga tubercles emergence and a 23% decrease in Striga attachment (Samejima and Sugimoto, 2018). In another study, the significant decrease of Striga seed germinating activity of sorghum root exudates following treatment with Pseudomonas suspensions, may have resulted from SLs degradation (Jamil et al, 2021).…”

Section: Current Trends In Striga Managementmentioning

confidence: 99%

“…High amounts of the poisonous amino acids L-tyrosin and L-leucine, which are toxic to Striga but not to maize are produced by some F. oxysporum and this interferes with the strictly regulated homeostasis of free amino acids. Also, soil microbes convert methionine secreted by F. oxysporum strains into germination stimulant ethylene which results in Striga seeds germinating suicidally (Babalola et al, 2007;Jamil et al, 2021;David et al, 2022). Watson (2013) proposed that Striga treatment could be accomplished in the field by seed coating with F. oxysporum (FOXY2).…”

Section: Current Trends In Striga Managementmentioning

confidence: 99%

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Trenchant microbiological-based approach for the control of Striga: Current practices and future prospects

Olowe

Akanmu

Fadiji

et al. 2023

Front. Sustain. Food Syst.

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Striga species are obligate parasitic weeds most of which are members of the Orobanchaceae family. They are commonly associated with staple crops and constitute threats to food security, especially in Sub-Saharan Africa. They pose deleterious impacts on staple cereal crops like maize and pearl millet, resulting in 7–10 billion dollars yield losses or, in extreme infestations, entire crop losses. Farmers' limited knowledge about the weed (genetics, ecology, nature of the damage caused, complex life cycle, interactions with its host and associated microbes) and their attitude toward its control have negatively affected its management and sustainability. With the present Striga management such as mechanical, chemicals, cultural and biological measures, it is extremely difficult to achieve its active management due to nature of the association between host plants and parasites, which requires highly selective herbicides. The use of soil microbes has not been well explored in the management of Striga infection in African countries. However, many soil microorganisms have been considered viable biological control techniques for fighting parasitic weeds, due to their vast action and roles they play in the early stage of host-Striga interaction. Their application for pest control is well perceived to be cost-effective and eco-friendly. In this review, we gave a comprehensive overview of major knowledge gaps and challenges of smallholders in Striga management and highlighted major potentials of microbial-based approach with respect to the mechanisms of host-Striga-microbe interactions, and the metagenomics roles on Striga management that include understanding the microbe and microbial systems of Striga-infested soil.

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Section: Current Trends In Striga Managementmentioning

confidence: 99%

Section: Current Trends In Striga Managementmentioning

confidence: 99%

Trenchant microbiological-based approach for the control of Striga: Current practices and future prospects

Olowe

Akanmu

Fadiji

et al. 2023

Front. Sustain. Food Syst.

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“…This is especially true for some parasitic weeds, such as Striga hermonthica (witchweed), which substantially reduces crop yields in sub-Saharan Africa, seriously endangering food security in this region. 48,49 In this case, the need for better control of this highly destructive weed is great, but the ability to pay for an expensive weed control technology is relatively low in this region. A promising new mycoherbicide that is being commercialized for this situation is discussed below.…”

Section: Problems and Solutionsmentioning

confidence: 99%

Why are there no widely successful microbial bioherbicides for weed management in crops?

Duke

2023

Pest Management Science

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Microbial biopesticides to control plant pathogens and insects in crops have had significant success. However, there have been relatively few successes for microbial bioherbicides in crops, despite considerable numbers of publications and commercial product introductions in this area. Marketed microbial bioherbicide products for use in agriculture have been largely unsuccessful. This article covers the potential advantages of successful microbial bioherbicides, as well as the biological and technical issues that have limited their success. Technologies to overcome the problems that have limited the success of these products are discussed. The many advantages of using killed microbial products (e.g. cell‐free filtrates) over living microbial products as bioherbicides are detailed. A commercialized mycoherbicide that has been selected for in the laboratory for control of the parasitic weed Striga hermonthica is being used with some success in Africa, indicating that non‐transgenic modification of the genetics of bioherbicide microbes for improved efficacy is acceptable to some regulatory authorities. Genetic modifications to improve efficacy and host range, as well as improved application technology to greatly reduce the amount of product needed are two technologies that are likely to expand the use of microbial bioherbicides in the future. © 2023 Society of Chemical Industry.

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“…Parasitic plants pose a significant risk to food security globally, approximately affecting millions of hectares of croplands and targeting vital cereal crops and vegetables ( Lanini and Kogan, 2005 ; Ejeta, 2007 ). These parasitic weeds develop specialised organs, haustoria, to invade host vascular systems and hijack water and nutrients ( Yoshida et al, 2016 ), leading to substantial reductions in agricultural productivity and, in some cases, complete crop failure ( Lanini and Kogan, 2005 ; David et al, 2022 ). Based on the host tissue invaded, parasitic weeds can be classified as stem or root parasites ( Yoshida et al, 2016 ).…”

Section: Notorious Parasitic Weeds and Global Food Securitymentioning

confidence: 99%

CRISPR gene editing to improve crop resistance to parasitic plants

Jhu,

Ellison,

Sinha

2023

Front. Genome Ed.

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Parasitic plants pose a significant threat to global agriculture, causing substantial crop losses and hampering food security. In recent years, CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) gene-editing technology has emerged as a promising tool for developing resistance against various plant pathogens. Its application in combating parasitic plants, however, remains largely unexplored. This review aims to summarise current knowledge and research gaps in utilising CRISPR to develop resistance against parasitic plants. First, we outline recent improvements in CRISPR gene editing tools, and what has been used to combat various plant pathogens. To realise the immense potential of CRISPR, a greater understanding of the genetic basis underlying parasitic plant-host interactions is critical to identify suitable target genes for modification. Therefore, we discuss the intricate interactions between parasitic plants and their hosts, highlighting essential genes and molecular mechanisms involved in defence response and multilayer resistance. These include host resistance responses directly repressing parasitic plant germination or growth and indirectly influencing parasitic plant development via manipulating environmental factors. Finally, we evaluate CRISPR-mediated effectiveness and long-term implications for host resistance and crop improvement, including inducible resistance response and tissue-specific activity. In conclusion, this review highlights the challenges and opportunities CRISPR technology provides to combat parasitic plants and provides insights for future research directions to safeguard global agricultural productivity.

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Striga hermonthica: A highly destructive pathogen in maize production

Cited by 21 publications

References 125 publications

Trenchant microbiological-based approach for the control of Striga: Current practices and future prospects

Trenchant microbiological-based approach for the control of Striga: Current practices and future prospects

Why are there no widely successful microbial bioherbicides for weed management in crops?

CRISPR gene editing to improve crop resistance to parasitic plants

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