Article
Multidisciplinary Sciences
Sidra Zahoor, Rabia Naz, Rumana Keyani, Thomas H. Roberts, Muhammad N. Hassan, Humaira Yasmin, Asia Nosheen, Saira Farman
Summary: This study isolated multiple bacterial strains from the root-adhering soil of quinoa seedlings with potential for promoting plant growth and suppressing diseases. Among these strains, Bacillus licheniformis and Bacillus pumilus showed the most effective activities in promoting tomato plant growth and reducing disease severity caused by Alternaria alternata infection.
SCIENTIFIC REPORTS
(2022)
Article
Agronomy
Fei Wang, Seiya Saito, Themis J. Michailides, Chang-Lin Xiao
Summary: Alternaria rot caused by Alternaria alternata and A. arborescens is a major postharvest disease affecting blueberries in California. The effectiveness of natamycin as a postharvest treatment to control Alternaria rot was evaluated, with established baseline sensitivities in the two Alternaria species. Results showed that natamycin can be an effective tool for controlling postharvest Alternaria rot in blueberry, significantly reducing disease incidence and severity.
POSTHARVEST BIOLOGY AND TECHNOLOGY
(2021)
Article
Plant Sciences
Fei Wang, Seiya Saito, Themis J. Michailides, Chang-Lin Xiao
Summary: The study evaluated the potential of natamycin as a postharvest treatment for controlling Alternaria rot on mandarin fruit. The results indicated that natamycin was effective in reducing disease incidence and severity, even when the treatment was delayed after inoculation.
Article
Plant Sciences
Fei Wang, Seiya Saito, Chang-Lin Xiao
Summary: Alternaria rot, caused by Alternaria alternata and A. arborescens, is a common postharvest disease in California mandarin fruit. This study examined the resistance of A. alternata and A. arborescens to various fungicides. The results showed that fludioxonil, pyrimethanil, imazalil, and propiconazole effectively reduced disease incidence and severity in mandarin fruit.
Article
Microbiology
Chantal Fernandes, Marta Mota, Lillian Barros, Maria Ines Dias, Isabel C. F. R. Ferreira, Ana P. Piedade, Arturo Casadevall, Teresa Goncalves
Summary: The study focuses on the alterations of the composition and structure of the hyphal cell wall of Alternaria alternata under the catabolism of L-tyrosine and L-phenylalanine, leading to the synthesis of pyomelanin and inhibition of DHN-melanin accumulation. This process involves the transcription regulator CmrA down-regulating DHN-melanin synthesis when pyomelanin is being synthesized. The presence of L-tyrosine and L-phenylalanine induces pigmentation and cell wall changes, which may be relevant to infection conditions.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Agronomy
Jiali Yang, Tengfei Wang, Jianbing Di, Yaping Liu, Yu Wang
Summary: Recent progress has shown that glutamate can enhance the resistance of tomato fruit to Alternaria alternata by affecting ethylene biosynthesis and signaling pathways.
POSTHARVEST BIOLOGY AND TECHNOLOGY
(2022)
Article
Agronomy
Yunpeng Gai, Qichen Niu, Jinchao Kong, Lei Li, Xingxing Liang, Yuwei Cao, Xianqi Zhou, Xuepeng Sun, Haijie Ma, Mingshuang Wang, Neeraj Shrivastava, Hongye Li, Chen Jiao
Summary: A comparative transcriptome analysis was performed to study the gene expression patterns of Alternaria alternata during infection of citrus. Significant gene expression differences were found between the early and late stages of infection. Several novel genes related to plant-pathogen interaction were identified. RT-qPCR analysis confirmed the expression patterns of selected genes from the peroxisome pathway.
Article
Horticulture
Lihuan Qin, Lin Zhao, Chao Wu, Shenchun Qu, Sanhong Wang
Summary: miRNAs play a significant regulatory role in plant responses to pathogens, with some miRNAs in apple leaves targeting genes involved in disease resistance. Specifically, the study found that certain miRNAs and their target genes exhibit differential expressions in different apple cultivars, shedding light on their roles in regulating resistance mechanisms. Additionally, a fungus-induced plant-genome-encoded miRNA was found to increase susceptibility to fungal infection via a post-transcriptional R-gene-knockdown mechanism.
SCIENTIA HORTICULTURAE
(2021)
Article
Agronomy
Rong Li, Wenyi Xu, Yuanyuan Zong, Xiaojin Wang, Yongcai Li, Yang Bi, Dov B. Prusky
Summary: The polyketide synthase gene (Aapks) in Alternaria alternata plays a crucial role in melanin synthesis, response to stresses, infection structure formation, and pathogenicity. A study showed that AAapks mutant lacked melanin production, exhibited reduced sporulation and abnormal morphology. The mutant strain also showed hypersensitivity to cell wall and oxidant stress factors, and had delayed infection structure formation. The virulence of AAapks strain was reduced in both wound-inoculated pear fruit and non-wound-inoculated tobacco leaves. These findings highlight the vital regulatory role of Aapks in A. alternata.
POSTHARVEST BIOLOGY AND TECHNOLOGY
(2023)
Article
Plant Sciences
Pei-Ching Wu, Celine Yen Ling Choo, Hsin-Yu Lu, Xian-Yong Wei, Yu-Kun Chen, Jonar Yago, Kuang-Ren Chung
Summary: The study demonstrates that Alternaria alternata can resist high levels of reactive oxygen species (ROS) and autophagy plays a protective role in oxidative stress. Mutation of the AaAtg8 gene impairs autophagy, leading to the accumulation of peroxisomes and decreased virulence.
MOLECULAR PLANT PATHOLOGY
(2022)
Article
Infectious Diseases
Katarina Martinko, Sinisa Ivankovic, Boris Lazarevic, Edyta Dermic, Damir Dermic
Summary: Finding environmentally friendly and efficient antifungal agents to control early blight in tomato plants is crucial in contemporary agriculture. This study tested the activity of boric acid (BA) and its derivative phenylboronic acid (PBA) in controlling early blight symptoms caused by the pathogenic fungus Alternaria alternata. The results showed that both BA and PBA acted prophylactically on fungal infection, reducing the severity of symptoms and preventing deterioration of plant health. PBA was more efficient in suppressing the impact of A. alternata infection.
Article
Plant Sciences
Zhaolin Liang, Kai Liu, Chunyang Jiang, An Yang, Jiadi Yan, Xiaolei Han, Caixia Zhang, Peihua Cong, Liyi Zhang
Summary: In this study, we identified a key immune gene, MdFLS2, that plays a crucial role in the difference in sensitivity to AAAP between HF and HFTH1. Transient overexpression of the dominant allele of MdFLS2 from HF enhanced resistance to AAAP and induced expression of genes related to salicylic acid pathway. The insertion of a TRIM-like sequence regulated the expression level of the allele of MdFLS2, thereby affecting the sensitivity of HF and HFTH1 to AAAP.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Agriculture, Multidisciplinary
Ratan Lal Sharma, R. R. Ahir, Shankar Lal Yadav, Pinki Sharma, R. P. Ghasolia
Summary: The study found that copper sulphate and zinc sulphate exhibited the most significant antifungal activity in vitro, while garlic extract at 10% concentration showed complete inhibition of mycelial growth. In field experiments, foliar applications of copper sulphate (0.5%) and garlic extract (10%) were the most effective methods in reducing disease intensity and increasing fruit yield, respectively.
JOURNAL OF PLANT DISEASES AND PROTECTION
(2021)
Article
Multidisciplinary Sciences
Jaycee Augusto Gumiran Paguirigan, Jung A. Kim, Jae-Seoun Hur, Wonyong Kim
Summary: Lichens are capable of producing novel bioactive metabolites, with approximately 1,000 secondary metabolites identified to date. This study focused on the biosynthetic gene clusters (BGCs) responsible for lichen secondary metabolites, specifically the BGC for cristazarin production in Cladonia metacorallifera. Transcriptome analysis revealed a non-reducing polyketide synthase (PKS) gene, crz7, highly expressed in growth media containing fructose or glucose, indicating its involvement in cristazarin biosynthesis. The conserved BGCs related to cristazarin were also found in other species, suggesting their potential for producing cristazarin. Phylogenetic analysis and neighboring gene functions provided insights into the plausible biosynthetic route for cristazarin. This study highlights the importance of transcriptome profiling in linking metabolites of interest to their biosynthetic genes in lichens.
Article
Biology
Svetlana Nekoval, Anastasia Zakharchenko, Anastasia Sadovaya, Arina Churikova, Irina Fedoryanskaya
Summary: An assessment of 27 mutant tomato lines from four countries revealed that mutant lines obtained from the United States showed greater resistance to Alternaria alternata, while mutant lines from other countries demonstrated moderate resistance. These findings suggest a potential correlation between geographic origin and resistance levels in tomato mutant lines.
SAUDI JOURNAL OF BIOLOGICAL SCIENCES
(2022)
Article
Plant Sciences
Eman A. Ahmed, Amro A. Farrag, Ahmed A. Kheder, Ahmed Shaaban
Summary: Phytoplasma infection in sesame plants leads to deterioration in tissue and cell ultrastructure, increased primary and secondary metabolites, reduced water content, chlorophyll content, growth, and yield components, as well as higher peroxide value in the oil.
Article
Entomology
Gamal A. M. Ghanem, Ahmed M. A. Mahmoud, Ahmed A. Kheder, Doha A. S. Gebily, Asmaa Osamy
Summary: The study found that Streptomyces can effectively control ZYMV infection, promote plant growth, and induce systemic resistance, making it a potential novel biocontrol agent. The experimental results showed that the Behenic alcohol produced by Streptomyces may have antiviral properties by regulating virus replication, presenting an environmentally friendly and effective potential.
EGYPTIAN JOURNAL OF BIOLOGICAL PEST CONTROL
(2023)
Article
Horticulture
Amira K. Nasrallah, Ahmed A. Kheder, Maimona A. Kord, Ahmed S. Fouad, Mohamed M. El-Mogy, Mohamed A. M. Atia
Summary: This study evaluated the influence of calcium phosphate nanoparticles (CaP-NPs) as a soil fertilizer on the production and bioactive compounds of broad bean plants under salinity stress. Results showed that nano-fertilizer significantly improved plant yield and alleviated the adverse effects of salinity stress.