Article
Immunology
Yidan Wang, Chengde Yang, Mengjun Jin, Jianxin Zhong, Dahai Mei, Xingyin Wei, Hongfulianhua Wang
Summary: This study reports for the first time that Alternaria alternata is the causative agent of leaf spot disease on Tussilago farfara in China. The pathogen was identified based on its morphological and molecular characteristics, and the optimal conditions for its growth and sporulation were determined.
MICROBIAL PATHOGENESIS
(2022)
Article
Plant Sciences
Xi Xu, Jingjing Li, Xilang Yang, Li Zhang, Shuo Wang, Guijin Shen, Bing Hui, Jialei Xiao, Changjian Zhou, Xiangjing Wang, Junwei Zhao, Wensheng Xiang
Summary: Maize leaf spot is a common disease worldwide, and this study identified several Epicoccum species as causal agents. These pathogens showed high pathogenicity to different maize varieties and exhibited varying sensitivities to common fungicides. The isolates also displayed different enzyme production capacities.
Article
Plant Sciences
Xi Xu, Li Zhang, Xilang Yang, Hanshui Cao, Jingjing Li, Peng Cao, Lifeng Guo, Xiangjing Wang, Junwei Zhao, Wensheng Xiang
Summary: This study identified and analyzed 168 Alternaria isolates from symptomatic maize leaves, and found four Alternaria species, with Alternaria tenuissima being the most common. Pathogenicity tests showed that maize leaves inoculated with A. alternata had higher disease incidence and disease index compared to A. tenuissima, Alternaria sp., and A. burnsii. Haplotype analyses indicated a population expansion. The study revealed a greater diversity of Alternaria species associated with maize leaf blight in Heilongjiang Province compared to previous reports.
Article
Agronomy
Pengjie He, Xiyan Luo, Xiaoyun Wu, Wenyan Cui
Summary: Lonicera japonica Thunb. (honeysuckle) is a medicinal herb widely cultivated in China. It has been affected by a leaf spot disease in Suiyang, Guizhou, China. The disease is caused by the fungus Alternaria alternata, which leads to necrotic spots and wilting on the leaves. This study provides important insights into the understanding and control measures of honeysuckle leaf spot in China.
Article
Microbiology
Yanru Lan, Zhichen Yan, Tingyu Duan, Katrina Maria Ramonell
Summary: This study identified Alternaria tenuissima as the fungal species causing Luobuma leaf spot disease and evaluated the effectiveness of fungicides. The findings showed that hymexazol fungicide can be used to control the disease.
Article
Multidisciplinary Sciences
R. K. Fagodiya, Amit Trivedi, B. L. Fagodia
Summary: Weather attributes play a crucial role in the infection process and spread of Alternaria leaf spot, a destructive disease of soybean. Early sowing predisposes soybean plants to the disease, and therefore it is recommended for farmers to delay sowing to reduce disease occurrence.
SCIENTIFIC REPORTS
(2022)
Article
Biotechnology & Applied Microbiology
Chuzhen Xu, Jing Zhang, Jiangruihang Zhou, Yanyan Zheng, Wei Huang, Dong Qin, Junwei Huo, Yonggang Li
Summary: This study aimed to identify the pathogen causing blackcurrant leaf spot, assess its pathogenicity, host range, and sensitivity to fungicides, and test the effectiveness of field control. It was found that the causal agent of blackcurrant leaf spot in northern China is Alternaria alternata, which can infect a variety of plants but not Viburnum trilobum and Prunus tomentosa. Additionally, different blackcurrant cultivars exhibited varying levels of resistance to A. alternata. Propiconazole-azoxystrobin was found to be more suitable for controlling leaf spot in the field.
JOURNAL OF APPLIED MICROBIOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Wenqi Li, Wei Huang, Jiangruihang Zhou, Jiajun Wang, Jinxin Liu, Yonggang Li
Summary: The aim of this study was to identify and characterize the causal agent of soybean leaf spot in Northeast China, assess its pathogenicity to main crops, determine its sensitivity to chemical fungicides, and evaluate the control efficacy. Alternaria alternata was identified as the pathogen causing soybean leaf spot, with a broad host range among leguminous plants. The pathogen showed high sensitivity to flusilazole, making it an effective fungicide for controlling soybean leaf spot.
JOURNAL OF APPLIED MICROBIOLOGY
(2023)
Article
Agronomy
Yuli Dai, Lin Gan, Xiaofei Liu, Chengzhong Lan, Zhiqiang Li, Xiujuan Yang
Summary: This study reports the occurrence of leaf spot disease caused by Colletotrichum plurivorum on cowpea plants in Pingnan prefecture, Fujian Province, China. The pathogen was identified based on morphological features and gene sequencing. Pathogenicity tests confirmed that the isolates of C. plurivorum could infect healthy cowpea leaves and induce leaf spot symptoms.
Article
Agronomy
Sayma T. Nira, Md Farhad Hossain, Nur Uddin Mahmud, Oliul Hassan, Md Tofazzal Islam, Abdul M. Akanda
Summary: The aim of this study was to isolate and characterize the pathogen responsible for Alternaria leaf spot on broccoli and evaluate the effectiveness of fungicides against it. The pathogen was identified as Alternaria alternata based on morphological and molecular analysis. The conidia of the isolates had distinct characteristics, and the maximum growth of the pathogen was observed at 30 degrees C and pH 6.0. Tilt 250 WC showed the highest inhibitory potential against the mycelial growth of A. alternata at a low concentration.
PLANT PROTECTION SCIENCE
(2022)
Article
Plant Sciences
Liu-Yi Pan, Jing Zhou, Yan Sun, Bai-Xue Qiao, Tian Wan, Rui-Quan Guo, Juan Zhang, Dong-Qian Shan, Yu-Liang Cai
Summary: A combined physiological, transcriptomic, and metabolomic approach was used to investigate the molecular mechanisms underlying sweet cherry's resistance to the necrotrophic fungal pathogen, Alternaria alternata. The study found that A. alternata infection induced the outbreak of reactive oxygen species (ROS) in cherry and observed earlier responses of antioxidant enzymes and chitinase in the resistant cultivar compared to the susceptible cultivar. The resistant cultivar exhibited stronger cell wall defense ability and differential genes and metabolites were enriched in various defense pathways. Reprogramming of the phenylpropanoid pathway and the alpha-linolenic acid metabolic pathway enhanced antifungal and ROS scavenging activity in the resistant cultivar.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Amna Shoaib, Mishaal Akhtar, Arshad Javaid, Haider Ali, Zahra Nisar, Shabnam Javed
Summary: The study investigated the effects of ZnSO4 on Alternaria alternata in vitro and the impact of foliar application of ZnSO4 on chili pepper plants under disease stress. Results showed that Zn inhibited fungal growth, improved plant resistance, and effectively managed disease. Foliar Zn application enhanced antioxidant activities and defense compounds in plants, reducing disease incidence by 77%. This research suggests foliar ZnSO4 as an effective and sustainable agricultural practice for managing Alternaria leaf spot disease in chili pepper plants.
PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
(2021)
Article
Plant Sciences
Muhammad Ismail Buzdar, Nasim Ahmed, Muhammad Jawad Akbar Awan, Saleem. Ur-Rahman, Muhammad Abu Bakar Waqas, Ghulam Raza, Fathia Mubeen, Shahid Mansoor, Imran Amin
Summary: This study confirms, for the first time in Pakistan, the occurrence of soybean leaf spot caused by A. alternata. Through isolation, identification, and molecular characterization, the pathogenicity of the fungus was established. This has significant agricultural implications for soybean cultivation in Pakistan.
JOURNAL OF PLANT PATHOLOGY
(2023)
Article
Agronomy
Ruoxin Ruan, Dujun Xi, Chen Zhang, Kangkang Huang, Huifeng Luo, Hui Liu
Summary: Kiwiberry brown spot disease caused by Alternaria alternata has been found in orchards in Zhejiang Province, China. The disease starts from the early stage of fruit development, with brown spots extending as the fruits grow. The fungus was confirmed to be Alternaria alternata through molecular identification.
Article
Agriculture, Multidisciplinary
Altinay Simsek, Havva Dinler, Ayse Uysal Morca
Summary: This study focused on the morphological and molecular identification of Alternaria spp., the causal agent of leaf spot disease on sweet cherry in Usak province, Turkey. The isolates were tested for pathogenicity and phylogenetic analysis showed that they clustered with reference isolates of A. alternata. This is the first report of A. alternata causing leaf spot disease on sweet cherry in Turkey.
JOURNAL OF PLANT DISEASES AND PROTECTION
(2022)