Article
Microbiology
Viridiana Morales-Sanchez, Carmen E. Diaz, Elena Trujillo, Sonia A. Olmeda, Felix Valcarcel, Ruben Munoz, Maria Fe Andres, Azucena Gonzalez-Coloma
Summary: The ethyl acetate extract from the endophytic fungus Aspergillus sp. SPH2 showed potential biocontrol properties against various plant pathogens, insect pests, and plant parasites. Compound 1, mellein, demonstrated strong ixodicidal effects, while compound 2, neoaspergillic acid, exhibited potent antifungal effects. The study also suggested that compound 2 may be the biosynthetic precursor of compound 3, neohydroxyaspergillic acid.
Article
Plant Sciences
Yanbing Wang, Yang Luo, Pei Tian, Hao Peng, Jian Feng
Summary: The study evaluated the effects of Epichloe sinensis on the interaction between host grasses Festuca sinensis and two fungal pathogens. Results showed that the endophyte had positive effects on disease resistance of Festuca sinensis, while host genotype also played a role in disease resistance. The findings provided important insights into the relationship between native grass species and associated endophytes.
JOURNAL OF PHYTOPATHOLOGY
(2021)
Article
Multidisciplinary Sciences
Lianyu Zhou, Chunjie Li, James F. White, Richard D. Johnson
Summary: The study shows that Epichloe endophyte infection can enhance the tolerance of Festuca sinensis to biotic and abiotic stresses, while the addition of exogenous calcium nitrate can increase the levels of chlorophyll and soluble sugars in plants.
Article
Agronomy
Md. Humayun Kabir, Kridsada Unban, Pratthana Kodchasee, Rasiravathanahalli Kaveriyappan Govindarajan, Saisamorn Lumyong, Nakarin Suwannarach, Pairote Wongputtisin, Kalidas Shetty, Chartchai Khanongnuch
Summary: In this study, 70 bacterial isolates were obtained from healthy tea leaves samples from different tea gardens in Chiang Mai, Thailand. These isolates belonged to 11 different genera and showed plant growth-promoting abilities. Two bacterial strains were found to enhance seed germination and seedling growth in sunflower and tomato seeds.
Article
Agronomy
Lianyu Zhou, Huichun Xie, Xuelan Ma, Jiasheng Ju, Qiaoyu Luo, Feng Qiao
Summary: This study reveals that selenite concentrations and culture time have an impact on the growth and metabolite profiles of Epichloe sp. from F. sinensis. The mycelial biomass decreases with increasing Se concentrations and peaks at week five. The analysis using GC-MS shows diverse changes in extracellular and intracellular metabolites under Se conditions.
Article
Biochemistry & Molecular Biology
Lianyu Zhou, Lu Jiao, Jiasheng Ju, Xuelan Ma
Summary: In this study, Epichloe sp. exposed to different selenite conditions exhibited changes in colony diameter, metabolites, and glutathione levels. Selenite had an inhibitory effect on Epichloe sp. initially, but the effect diminished over time. The relative levels of certain metabolites, including 2-keto-isovaleric acid, uridine, and maltose, increased under selenite conditions. Selenite also promoted the production of carbohydrates, fatty acids, and amino acids in Epichloe sp. mycelia.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2022)
Article
Microbiology
Chenghui Peng, Xiaoxin Zhuang, Congting Gao, Zhiyan Wang, Junwei Zhao, Sheng-Xiong Huang, Chongxi Liu, Wensheng Xiang
Summary: A novel endophytic actinomycete with antagonistic activity against various phytopathogenic fungi, named Streptomyces typhae sp. nov., was isolated from the root of cattail collected from Yunnan Province, Southwest China. The taxonomic study confirmed its distinct species status, supported by genetic and phenotypic differences from closely related strains.
ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY
(2021)
Article
Agronomy
Yan-Yan Ding, Yu Sun, Xiong-Fei Luo, Shao-Yong Zhang, Rui Wang, Zhi-Gang Yang, Jing-Ru Wang, Bao-Qi Zhang, Zhi-Jun Zhang, Yue Ma, Jun-Xia An, Han Zhou, Ying-Qian Liu
Summary: This study extracted the essential oil and main components of Angelica sinensis and evaluated their antifungal activities. The compound 3-butylidenephthalide (3-BPH) showed the best antifungal activity against Fusarium graminearum. Mechanistic studies revealed that 3-BPH induced the generation of endogenous ROS, causing lipid peroxidation of the cell membrane and inhibiting the biosynthesis of ergosterol, leading to cell membrane damage and fungicidal activity. The study also showed that 3-BPH can reduce deoxynivalenol production.
PEST MANAGEMENT SCIENCE
(2023)
Article
Microbiology
Patrick A. Fardella, Bruce B. Clarke, Faith C. Belanger
Summary: Fungal plant pathogens pose significant challenges to crop species, and current control measures heavily rely on fungicides. However, fungicide use has drawbacks such as potential harm to non-target organisms and development of resistance in target fungi. Research is now focused on finding alternative strategies to reduce fungicide reliance. One promising approach involves exploring antifungal proteins from different fungal species as potential biofungicides. This study shows that an antifungal protein called Efe-AfpA from the fungal endophyte Epichloe festucae not only protects plants against Clarireedia jacksonii, but also exhibits inhibitory activity against other important plant pathogens, suggesting it could be developed as a broad-spectrum biofungicide.
Article
Chemistry, Organic
Md Rokon Ul Karim, Yasuko In, Tao Zhou, Enjuro Harunari, Naoya Oku, Yasuhiro Igarashi
Summary: Two bicyclic peptides, nyuzenamides A and B, isolated from Streptomyces in deep sea water collected in the Sea of Japan, exhibited antifungal activity against pathogenic fungi and cytotoxicity against P388 murine leukemia cells. The structures of these compounds, comprising ten amino acid residues with four unusual amino acids and aromatic acyl units, were determined through various analytical methods.
Article
Biochemistry & Molecular Biology
Xiaoyuan Tang, Yuxuan Zhao, Xude Wang, Chongtao Ye, Baomin Feng, Chuan Tang, Xuan Lu
Summary: Seven undescribed polyketides with unique structures were isolated from Rhodiola tibetica endophytic fungus Alternaria sp. HJT-Y7. The structures of these compounds were determined using NMR and HR-ESI-MS analysis. Two undescribed compounds and four known compounds demonstrated significant inhibitory effects on LPS-induced NO production in cells without cytotoxicity.
Article
Plant Sciences
Zsolt Szucs, Tamas Plaszko, Eszter Bodor, Hajnalka Csoma, Lajos Acs-Szabo, Attila Kiss-Szikszai, Gabor Vasas, Sandor Gonda
Summary: The glucosinolates of Brassicaceae plants can be converted into bioactive isothiocyanates and other volatiles during stressful conditions. However, the role of weaker alternative products, such as nitriles, is not well understood.
Article
Microbiology
Peiqian Li, Baozhen Feng, Zhen Yao, Bohui Wei, Yanfei Zhao, Shouguo Shi
Summary: This study investigated the antagonistic effect of the endophytic strain Bacillus K1 on Botrytis cinerea and found that K1 significantly inhibited the growth of B. cinerea. Inoculation with K1 also reduced gray mold in grape fruit and induced the activity of defense-related enzymes. Scanning electron microscopy suggested that K1 inhibited mycelial growth through bacterial colonization and antibiosis. Genome sequencing revealed the presence of known biosynthesis gene clusters in K1. This study provides a potential biological agent for controlling post-harvest grape fruit diseases and enhances our understanding of the biocontrol mechanisms of Bacillus strains.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Mycology
Ling Qiu, Kai Zhang, Zhao-Huan Xu, R. F. Castanteda-Ruiz, Jian Ma
Summary: A new species, Cordana sinensis, is described and illustrated from a specimen collected in Jiangxi Province, China. It is characterized by its unique conidiogenous cells and smooth, pale brown conidia with a slightly prominent hilum.
Article
Mycology
Ling Qiu, Jing-Wen Liu, Kai Zhang, Rafael F. Castaneda-Ruiz, Zhao-Huan Xu, Jian Ma
Summary: A new hyphomycete genus and species, Neoveronaea sinensis, was discovered in Jiangxi Province, southern China. It is characterized by macronematous conidiophores and euseptate, obovoid to ellipsoidal, pale brown, smooth conidia. Phylogenetic analyses based on DNA sequences of internal transcribed spacer (ITS) and nuclear ribosomal large subunit (LSU) place Neoveronaea within the Herpotrichiellaceae family, forming a distinct lineage from other genera.
Article
Plant Sciences
Haijuan Zhang, Xiuzhang Li, James F. White, Xuekai Wei, Yali He, Chunjie Li
Summary: The study showed that inoculating Epichloe endophyte in drunken horse grass significantly reduced the incidence and disease index of ergot disease. The symbiotic relationship could delay leaf senescence, increase antioxidant enzyme activity, reduce oxidative stress, and enhance chlorophyll content, affecting the photosynthetic process of the grass.
JOURNAL OF PLANT GROWTH REGULATION
(2022)
Article
Plant Sciences
Yali He, Taixiang Chen, Haijuan Zhang, James F. White, Chunjie Li
Summary: Research has shown that endophytes can increase plants' tolerance to aphid feeding and regulate plant growth. Endophyte triggers a factor that overrides negative growth effects and increases levels of jasmonic acid, antagonistic to the salicylic acid pathway.
JOURNAL OF PLANT GROWTH REGULATION
(2022)
Article
Plant Sciences
Jing Liu, Zhenjiang Chen, James F. White, Taixiang Chen, Qian Shi, Yuanyuan Jin, Xiuzhang Li, Chunjie Li
Summary: This study investigates the variation in ergot alkaloid and endogenous hormone content of Achnatherum inebrians from different environments. The results show that altitude and mean month temperature are major factors affecting alkaloids and endogenous hormones levels. Additionally, there are differences in the relationship between alkaloids and endogenous hormones at different altitudes.
JOURNAL OF PLANT GROWTH REGULATION
(2023)
Article
Plant Sciences
Longhai Xue, Zhiting Xu, Jiaqi Liu, Hao Chen, James F. White, Kamran Malik, Chunjie Li
Summary: Pyrenophora is a genus of pathogens causing leaf damage and seedborne fungus in Italian ryegrass. Using DNA analysis and morphological characteristics, eight Pyrenophora species were identified, including three newly reported species. Pathogenicity tests showed that all Pyrenophora species could inhibit seed germination and infect Italian ryegrass, with P. dictyoides being the most important seedborne pathogen. The data from this study are useful for accurate identification of Pyrenophora species and the development of seedborne disease management strategies.
Editorial Material
Plant Sciences
Jiaqi Liu, Gensheng Bao, Chunjie Li
Editorial Material
Plant Sciences
Jiaqi Liu, Zhongfu Long, Longhai Xue, Chunjie Li
Article
Soil Science
Zhenjiang Chen, James F. White, Kamran Malik, Hao Chen, Yuanyuan Jin, Xiang Yao, Xuekai Wei, Chunjie Li, Zhibiao Nan
Summary: This study investigated the changes in microbial functional genes, plant nutrients, and soil N2O flux in the rhizosphere soil of ryegrass infected with Epichloe center dot festucae var. lolii. The results showed that the presence of endophytes reduced plant nutrient traits and increased soil nutrient accumulation, as well as altered the microbial environment. The presence of fungal endophytes increased community diversity in certain microbial functional genes and had an impact on N2O fluxes. These changes in plant and soil traits mediated by endophyte infection were closely related to N2O fluxes and the abundance of certain functional genes, such as nifH.
SOIL BIOLOGY & BIOCHEMISTRY
(2022)
Article
Microbiology
Tian Wang, Taixiang Chen, James F. White, Chunjie Li
Summary: In this study, three fungal endophytes isolated from the grass Hordeum bogdanii were characterized. They were identified as Epichloe sp. HboTG-2 based on morphological characteristics and phylogenetic analyses. Analysis of alkaloid synthesis related genes showed that Epichloe sp. HboTG-2 may only produce peramine, which is toxic to insects.
Article
Microbiology
Zhengfeng Wang, Jing Liu, James F. F. White, Chunjie Li
Summary: This study suggests that Epichloe bromicola derived from wild barley has the potential to increase salt tolerance in cultivated barley. The inoculation of E. bromicola can enhance the growth and salt tolerance of barley, with effects varying under different salt stress conditions. These findings provide new insights into the mechanism of barley-fungal endophyte association and raise interesting questions about the role of E. bromicola in fungus-enhanced tolerance to salt stress in this symbiosis.
FRONTIERS IN MICROBIOLOGY
(2022)
Editorial Material
Plant Sciences
Hao Chen, Rui Zhang, Chunjie Li
Article
Plant Sciences
Jie Jin, Jianfeng Wang, XueLi Niu, Chao Wang, Kamran Malik, Chunjie Li
Summary: Human activities have led to an increase in atmospheric reactive N inputs, negatively impacting plant and microbial communities. The symbiotic relationship between host and endophytic fungi in the N enrichment environment is not well understood.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2023)
Editorial Material
Plant Sciences
L. L. Xu, Y. Q. Qian, L. H. Xue, B. H. Yu, C. J. Li
Article
Agronomy
Jianjun Wang, Taixiang Chen, Xuekai Wei, Malik Kamran, James F. White, Guiqin Zhao, Chunjie Li
Summary: Leaf blight disease (LBD) caused by Pantoea agglomerans is a newly emerged oat disease in China that causes great economic and yield losses of oat production. Laboratory and field experiments were conducted to evaluate the efficacy of 13 antimicrobial agents against P. agglomerans and recommend agents with better control efficacy for use. Zhongshengmycin and ethylicin were found to be the most effective in inhibiting the growth of P. agglomerans, with higher bacteriostatic rates and lower EC50 than other agents. Foliar application of zhongshengmycin or ethylicin can be used for the effective management of LBD of oat.
Article
Plant Sciences
Jianjun Wang, Yupei Zhou, Longhai Xue, Xuekai Wei, James F. White, Taixiang Chen, Chunjie Li
Summary: This study investigated the occurrence of seed-borne fungi in oat seeds from Baicheng, Dingxi, and Haibei cities in China and found that Alternaria and Epicoccum were the dominant seed-borne species. The pathogenicity tests showed that these seed-borne fungal pathogens significantly reduced seed germination rate, seedling growth, and vigor index of oat seeds. Seed-borne fungal infection can inhibit seed germination and seedling growth of oat.
JOURNAL OF PLANT PATHOLOGY
(2023)
Article
Plant Sciences
Jianjun Wang, Taixiang Chen, Xuekai Wei, Malik Kamran, James F. White, Chunjie Li
Summary: The study found that P. agglomerans has a negative impact on the photosynthetic characteristics of oats, including reducing leaf area, net photosynthetic rate, etc., and also inhibiting the activity of Rubisco and SBPase. Importantly, the B2 variety has a stronger photosynthetic ability than the B7 variety in all growth stages.
JOURNAL OF PLANT PATHOLOGY
(2022)
