Interactions of Plant-Parasitic Nematodes and Plant-Pathogenic Bacteria

Siddiqui, Zaki A.; Nesha, Rukshima; Singh, Neelu; Alam, S. Mashhood

doi:10.1007/978-3-642-27515-9_14

Cited by 25 publications

(13 citation statements)

References 35 publications

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“…Species of Agrobacterium and Ralstonia , such as Agrobacterium tumefaciens , A. radiobacter var. tumefaciens , A. vitis and R. solanacearum , can interact with M. incognita or other RKNs in plant disease complexes . In addition, the genus Legionella , including L. pneumophila , was detected with low abundance in our samples.…”

Section: Discussionmentioning

confidence: 73%

Associated bacteria of different life stages of Meloidogyne incognita using pyrosequencing‐based analysis

Cao

Tian

et al. 2015

J. Basic Microbiol.

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The root knot nematode (RKN), Meloidogyne incognita, belongs to the most damaging plant pathogens worldwide, and is able to infect almost all cultivated plants, like tomato. Recent research supports the hypothesis that bacteria often associated with plant-parasitic nematodes, function as nematode parasites, symbionts, or commensal organisms etc. In this study, we explored the bacterial consortia associated with M. incognita at different developmental stages, including egg mass, adult female and second-stage juvenile using the pyrosequencing approach. The results showed that Proteobacteria, with a proportion of 71-84%, is the most abundant phylum associated with M. incognita in infected tomato roots, followed by Actinobacteria, Bacteroidetes, Firmicutes etc. Egg mass, female and second-stage juvenile of M. incognita harbored a core microbiome with minor difference in communities and diversities. Several bacteria genera identified in M. incognita are recognized cellulosic microorganisms, pathogenic bacteria, nitrogen-fixing bacteria and antagonists to M. incognita. Some genera previously identified in other plant-parasitic nematodes were also found in tomato RKNs. The potential biological control microorganisms, including the known bacterial pathogens and nematode antagonists, such as Actinomycetes and Pseudomonas, showed the largest diversity and proportion in egg mass, and dramatically decreased in second-stage juvenile and female of M. incognita. This is the first comprehensive report of bacterial flora associated with the RKN identified by pyrosequencing-based analysis. The results provide valuable information for understanding nematode-microbiota interactions and may be helpful in the development of novel nematode-control strategies.

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Section: Discussionmentioning

confidence: 73%

Associated bacteria of different life stages of Meloidogyne incognita using pyrosequencing‐based analysis

Cao

Tian

et al. 2015

J. Basic Microbiol.

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“…and pathogens such as Fusarium spp. are well documented, while there may still be many other interactions which are less well studied (Siddiqui et al, 2010;Mongae et al, 2013).…”

Section: Economic Impactmentioning

confidence: 99%

The threat of root‐knot nematodes (Meloidogyne spp.) in Africa: a review

et al. 2014

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Meloidogyne species pose a significant threat to crop production in Africa due to the losses they cause in a wide range of agricultural crops. The direct and indirect damage caused by various Meloidogyne species results in delayed maturity, toppling, reduced yields and quality of crop produce, high costs of production and therefore loss of income. In addition, emergence of resistance-breaking Meloidogyne species has partly rendered various pest management programmes already in place ineffective, therefore putting food security of the continent at risk. It is likely that more losses may be experienced in the future due to the on-going withdrawal of nematicides. To adequately address the threat of Meloidogyne species in Africa, an accurate assessment and understanding of the species present, genetic diversity, population structure, parasitism mechanisms and how each of these factors contribute to the overall threat posed by Meloidogyne species is important. Thus, the ability to accurately characterize and identify Meloidogyne species is crucial if the threat of Meloidogyne species to crop production in Africa is to be effectively tackled. This review discusses the use of traditional versus molecular-based identification methods of Meloidogyne species and how accurate identification using a polyphasic approach can negate the eminent threat of root knot nematodes in crop production. The potential threat to Africa posed by highly damaging and resistance-breaking populations of 'emerging' Meloidogyne species is also examined.

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“…From the host's perspective, a mass of genes will be activated in response to the intrusion of external pathogens. Entry of the pathogen could be prevented at different layers, such as cell wall, plasma membrane and various enzymes in cytoplasm (Braeken et al, 2008;Soto et al, 2011;Siddiqui et al, 2012). However, there are relatively few studies of the regulatory mechanism within wheat in response to powdery mildew, and, so far, only the functional mechanism of individual genes has been analyzed during powdery mildew infection, including MYB and NAC transcription factors (Zhou et al, 2018;Zheng et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Bulked Segregant RNA-Seq Reveals Distinct Expression Profiling in Chinese Wheat Cultivar Jimai 23 Responding to Powdery Mildew

Zhu

et al. 2020

Front. Genet.

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Wheat powdery mildew, caused by Blumeria graminis f. sp. tritici (Bgt), is one of the most destructive fungal diseases threatening global wheat production. Host resistance is well known to be the most efficient method to control this disease. However, the molecular mechanism of wheat powdery mildew resistance (Pm) is still unclear. To analyze the molecular mechanism of Pm, we used the resistant wheat cultivar Jimai 23 to investigate its potential resistance components and profiled its expression in response to powdery mildew infection using bulked segregant RNA-Seq (BSR-Seq). We showed that the Pm of Jimai 23 was provided by a single dominant gene, tentatively designated PmJM23, and assigned it to the documented Pm2 region of chromosome 5DS. 3,816 consistently different SNPs were called between resistant and susceptible parents and the bulked pools derived from the combinations between the resistant parent Jimai23 and the susceptible parent Tainong18. 58 of the SNPs were assigned to the candidate region of PmJM23. Subsequently, 3,803 differentially expressed genes (DEGs) between parents and bulks were analyzed by GO, COG and KEGG pathway enrichment. The temporal expression patterns of associated genes following Bgt inoculation were further determined by RT-qPCR. Expression of six disease-related genes was investigated during Bgt infection and might serve as valuable genetic resources for the improvement of durable resistance to Bgt.

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Interactions of Plant-Parasitic Nematodes and Plant-Pathogenic Bacteria

Cited by 25 publications

References 35 publications

Associated bacteria of different life stages of Meloidogyne incognita using pyrosequencing‐based analysis

Associated bacteria of different life stages of Meloidogyne incognita using pyrosequencing‐based analysis

The threat of root‐knot nematodes (Meloidogyne spp.) in Africa: a review

Bulked Segregant RNA-Seq Reveals Distinct Expression Profiling in Chinese Wheat Cultivar Jimai 23 Responding to Powdery Mildew

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