Alternaria species causing leaf spot on hemp (Cannabis sativa) in Northern China

Cheng, Hong; Zhao, Lin; Wei, Xin; Liu, Xi; Gao, Guo‐Yang; Deng, Jian Xin; Li, Mei-Jia

doi:10.1007/s10658-021-02450-1

Cited by 5 publications

(4 citation statements)

References 40 publications

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“…Among them, the RPB2 gene is considered as a nuclear gene with the advantages of being single-copy and having a slow evolutionary rate. It is capable of effectively distinguishing species for both large-spored and small-spored type [ 49 , 50 ], and is also applicable for the identification of other pathogenic fungi [ 51 ]. In this present study, seven gene loci without SSU and LSU were performed and clearly separated the four new taxa.…”

Section: Discussionmentioning

confidence: 99%

Four New Species of Small-Spored Alternaria Isolated from Solanum tuberosum and S. lycopersicum in China

Gou,

Aung,

Guo

et al. 2023

JoF

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Small-spored Alternaria species have been frequently isolated from diseased leaves of Solanum plants. To clarify the diversity of small-spored Alternaria species, a total of 118 strains were obtained from leaf samples of S. tuberosum and S. lycopersicum in six provinces of China during 2022–2023. Based on morphological characterization and multi-locus phylogenetic analysis of the internal transcribed spacer of the rDNA region (ITS), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), translation elongation factor 1 alpha (TEF1), RNA polymerase second largest subunit (RPB2), Alternaria major allergen gene (Alt a 1), endopolygalacturonase gene (EndoPG) and an anonymous gene region (OPA10-2), seven species were determined, including four novel species and three known species (A. alternata, A. gossypina and A. arborescens). The novel species were described and illustrated as A. longxiensis sp. nov., A. lijiangensis sp. nov., A. lycopersici sp. nov. and A. solanicola sp. nov.. In addition, the pathogenicity of the seven species was evaluated on potato leaves. The species exhibited various aggressiveness, which could help in disease management.

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Section: Discussionmentioning

confidence: 99%

Four New Species of Small-Spored Alternaria Isolated from Solanum tuberosum and S. lycopersicum in China

Gou,

Aung,

Guo

et al. 2023

JoF

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“…Alternaria , consisting of hundreds of species, is considered one of the most critical phytopathogens affecting plant tissues, including leaves, cereal grains, fruits, and vegetables [ 32 , 33 , 34 , 35 ]. It has been recorded as a critical fungal pathogen because of its worldwide occurrence on various hosts [ 32 , 33 , 34 , 35 ].…”

Section: Discussionmentioning

confidence: 99%

First Record of Alternaria pogostemonis: A Novel Species Causing Leaf Spots in Pogostemon cablin

et al. 2022

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Pogostemon cablin (Lamiaceae) is a component of traditional medicines in Southern China. The identification of P. cablin pathogens is essential for the production and development of this industry. During 2019–2020, a leaf spot on P. cablin was observed in Zhanjiang, Guangdong Province. The pathogen of the leaf spot was isolated and identified using morphological and phylogenetic methods. Phylogenetic analysis was performed using the internal transcribed spacer (ITS) region, glyceraldehyde-3-phosphate dehydrogenase (gapdh), RNA polymerase II (rpb2), translation extension factor 1-alpha (tef1), and Alternaria major allergen 1 (Alt-a1) genes. Based on phylogenetic and morphological studies, this was confirmed to be a novel species of Alternaria pogostemonis, with description and illustrations presented. The pathogenicity test of A. pogostemon was verified by Koch’s postulates as causing leaf spot disease. This is the first report of leaf spot disease in P. cablin caused by the Alternaria species. This study contributes to the knowledge of P. cablin leaf spot diseases.

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“…To obtain pure cultures, hyphal tips from developed colonies were transferred to fresh PDA plates three times [ 10 ]. The isolates were inoculated to PDA test tube slants and stored at 4 °C [ 11 ]. The strain was deposited at Yangtze University, Jingzhou, Hubei, China.…”

Section: Methodsmentioning

confidence: 99%

Morphological and Molecular Identification of Fusarium ipomoeae as the Causative Agent of Leaf Spot Disease in Tobacco from China

Wang¹,

et al. 2022

Microorganisms

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Tobacco (Nicotiana tabacum L.), which creates jobs for 33 million people and contributes two trillion dollars’ tax annually, is one of the most important economic plants globally. However, tobacco is seriously threatened by numerous diseases during production. Previously, the field survey of tobacco diseases was conducted in the Guizhou and Guangxi provinces, the two main tobacco-producing areas in China. A serious leaf spot disease, with a 22 to 35% incidence, was observed in farming plants. In order to determine the causal agents, we collected the disease samples and isolated the pathogenic fungi. The pathogen was identified as Fusarium ipomoeae, based on the morphological characteristics and phylogenetic analysis. Pathogenicity tests showed that F. ipomoeae could induce tobacco leaf spot and blight. To our knowledge, this is the first report worldwide of F. ipomoeae causing leaf spots and stems on tobacco. Our study reveals the serious consequences of F. ipomoeae on tobacco filed production and provides information for future diagnosis and management of the Fusarium disease.

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Alternaria species causing leaf spot on hemp (Cannabis sativa) in Northern China

Cited by 5 publications

References 40 publications

Four New Species of Small-Spored Alternaria Isolated from Solanum tuberosum and S. lycopersicum in China

Four New Species of Small-Spored Alternaria Isolated from Solanum tuberosum and S. lycopersicum in China

First Record of Alternaria pogostemonis: A Novel Species Causing Leaf Spots in Pogostemon cablin

Morphological and Molecular Identification of Fusarium ipomoeae as the Causative Agent of Leaf Spot Disease in Tobacco from China

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