Epidermal cell response to rust hyphae and the resistance mode of tropical maize to southern corn rust (Puccinia polysora underwood)

Ji, Hee Chung

doi:10.1007/bf03178817

Cited by 4 publications

(5 citation statements)

References 18 publications

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“…Lines 227, 229, 231 and 233 were considerably more resistant to P. polysora than the corresponding non‐transgenic sib lines. The area under the disease progress curve (AUDPC) value has been used as an indicator of the slow‐rusting characteristic of plants (Bailey et al ., ; Hurni et al ., ; Ji, ). In this study, disease severity was quantitatively assessed based on percentage of plants exhibiting symptoms daily between 8 and 14 days after inoculation.…”

Section: Resultsmentioning

confidence: 99%

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Comparative proteomics combined with analyses of transgenic plants reveal ZmREM1.3 mediates maize resistance to southern corn rust

Wang

Chen

Tian

et al. 2019

Plant Biotechnology Journal

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Summary Southern corn rust (SCR), which is a destructive disease caused by Puccinia polysora Underw. (P. polysora), commonly occurs in warm‐temperate and tropical regions. To identify candidate proteins related to SCR resistance and characterize the molecular mechanisms underlying the maize–P. polysora interaction, a comparative proteomic analysis of susceptible and resistant maize lines was performed. Statistical analyses revealed 1489 differentially abundant proteins in the resistant line, as well as 1035 differentially abundant proteins in the susceptible line. After the P. polysora infection, the abundance of one remorin protein (ZmREM1.3) increased in the resistant genotype, but decreased in the susceptible genotype. Plant‐specific remorins are important for responses to microbial infections as well as plant signalling processes. In this study, transgenic maize plants overexpressing ZmREM1.3 exhibited enhanced resistance to the biotrophic P. polysora. In contrast, homozygous ZmREM1.3 UniformMu mutant plants were significantly more susceptible to P. polysora than wild‐type plants. Additionally, the ZmREM1.3‐overexpressing plants accumulated more salicylic acid (SA) and jasmonic acid (JA). Moreover, the expression levels of defence‐related genes were higher in ZmREM1.3‐overexpressing maize plants than in non‐transgenic control plants in response to the P. polysora infection. Overall, our results provide evidence that ZmREM1.3 positively regulates maize defences against P. polysora likely via SA/JA‐mediated defence signalling pathways. This study represents the first large‐scale proteomic analysis of the molecular mechanisms underlying the maize–P. polysora interaction. This is also the first report confirming the remorin protein family affects plant resistance to SCR.

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Section: Resultsmentioning

confidence: 99%

“…Time (day) interval between two ratings, n , number of ratings (Campbell and Madden, ; Ji, ; Wilcoxson et al ., ). Leaves from five fresh plants were collected at 14 days after inoculation.…”

Section: Methodsmentioning

confidence: 99%

Comparative proteomics combined with analyses of transgenic plants reveal ZmREM1.3 mediates maize resistance to southern corn rust

Wang

Chen

Tian

et al. 2019

Plant Biotechnology Journal

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“…The present microscopic observation revealed a variation in trichome density, with more trichomes per unit area in MR than HS lines (Table 1; Figure 2). Ji (2006) found that the woolly cuticular leaf surfaces in the maize susceptible to G24 favoured the disease spread, whereas the trichomes and smooth leaves in resistant Hi38‐71 could enhance resistance to Puccinia polysora . Another prominent response observed by Nonomura et al (2009) which exudates of trichomes in wild tomato ( Lycopersicon pennellii ) showed antifungal activity against Oidium neolycopersici and suppressed conidial germination, which prevented the formation of appressoria.…”

Section: Discussionmentioning

confidence: 99%

Section: Stomatal Tropism and Interception Of Papillae And Trichomesmentioning

confidence: 98%

Histopathological patterns and differential behavioural of Rhizoctonia solani causing sheath blight in rice (Oryza sativa L.)

Thesiya

Lore

Bhatia

et al. 2023

Journal of Phytopathology

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Sheath blight of rice caused by Rhizoctonia solani Kuhn [teleomorph: Thanatephorus cucumeris (Frank) Donk] is a significant threat to rice cultivation, accounting for up to 50% yield losses. The present investigation demonstrates the early pathogenesis events and R. solani pre‐ and post‐penetration activities on moderately resistant (MR) and highly susceptible (HS) lines under field conditions. A pure culture of R. solani isolate (R1965) was inoculated inside the sheath at the maximum tillering stage for different time intervals (24, 48, 72 and 96 hpi). R. solani exhibited more profuse, dense, closely contact around surface grooves, lobate appressoria‐like structures and greater microsclerotia development on the HS line compared to the MR one. Using fluorescent, optical, and scanning electron microscopy, it was noticed for the first time that R. solani could intercept sheath papillae and employ them for attachment or penetration in two ways: (a) direct penetration by lobate or runner hyphae, appressorium and infection cushion and (b) indirect stomatal penetration. Assays using in vivo plant inoculation showed that disease lesion length was higher in the HS line than the MR line. Intraxylary hyphal colonization could be seen using microtomy to understand the cellular spatial dynamics of xylem colonization by R. solani. The penetration mechanism along with penetration hyphae of the R. solani inside HS rice lines describe in this paper for the first time using optical ultrastructure. These results supported for better understanding of host–pathogen interaction, penetration mechanism and colonization of R. solani in rice.

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“…Disease scores were recorded at 30 days post-pollination. The degree of infection on each plant was visually scored on a scale of 1 to 9 using the Stakman infection type scale with 1 = HR (highly resistant, almost free of rust pustules), 3 = R (resistant, infection covering 6% to 10% of leaf area), 5 = MR (moderately resistant, infection covering 11% to 30% of leaf area), 7 = S (susceptible, infection covering 31% to 70% of leaf area), and 9 = HS (highly susceptible, nearly completely covered with rust pustules) ( Wang et al., 2014 ; Deng et al., 2019 ; Deng et al., 2020 ; Li et al., 2021 ). The scores for each plot, based on the average of all plants in the plot, were used as the phenotype scores for each inbred line.…”

Section: Methodsmentioning

confidence: 99%

Identification of southern corn rust resistance QTNs in Chinese summer maize germplasm via multi-locus GWAS and post-GWAS analysis

Shu,

Wang,

Wang

et al. 2023

Front. Plant Sci.

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Southern corn rust (SCR) caused by Puccinia polysora Underw is a major disease leading to severe yield losses in China Summer Corn Belt. Using six multi-locus GWAS methods, we identified a set of SCR resistance QTNs from a diversity panel of 140 inbred lines collected from China Summer Corn Belt. Thirteen QTNs on chromosomes 1, 2, 4, 5, 6, and 8 were grouped into three types of allele effects and their associations with SCR phenotypes were verified by post-GWAS case-control sampling, allele/haplotype effect analysis. Relative resistance (RRR) and relative susceptibility (RRs) catering to its inbred carrier were estimated from single QTN and QTN-QTN combos and epistatitic effects were estimated for QTN-QTN combos. By transcriptomic annotation, a set of candidate genes were predicted to be involved in transcriptional regulation (S5_145, Zm00001d01613, transcription factor GTE4), phosphorylation (S8_123, Zm00001d010672, Pgk2- phosphoglycerate kinase 2), and temperature stress response (S6_164a/S6_164b, Zm00001d038806, hsp101, and S5_211, Zm00001d017978, cellulase25). The breeding implications of the above findings were discussed.

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Epidermal cell response to rust hyphae and the resistance mode of tropical maize to southern corn rust (Puccinia polysora underwood)

Cited by 4 publications

References 18 publications

Comparative proteomics combined with analyses of transgenic plants reveal ZmREM1.3 mediates maize resistance to southern corn rust

Comparative proteomics combined with analyses of transgenic plants reveal ZmREM1.3 mediates maize resistance to southern corn rust

Histopathological patterns and differential behavioural of Rhizoctonia solani causing sheath blight in rice (Oryza sativa L.)

Identification of southern corn rust resistance QTNs in Chinese summer maize germplasm via multi-locus GWAS and post-GWAS analysis

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