Oligomycins inhibit Magnaporthe oryzae Triticum and suppress wheat blast disease

Chakraborty, Moutoshi; Mahmud, Nur Uddin; Muzahid, Abu Naim Md.; Rabby, S. M. Fajle; Islam, Tofazzal

doi:10.1371/journal.pone.0233665

Cited by 26 publications

(30 citation statements)

References 55 publications

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“…The hyphal growth inhibition of MoT isolate BTJP 4–5 by antimycin A and Nativo ® 75 WG was calculated using the modified disk diffusion method [ 14 , 48 ]. A series of concentrations ranging from 0.005 to 2 μg/disk of antimycin A and Nativo ® 75 WG were prepared by dissolving the required amounts in DMSO and water.…”

Section: Methodsmentioning

confidence: 99%

“…To induce conidiogenesis, the mycelia of a 10-day-old MoT culture plate were washed to reduce nutrients [ 3 , 14 , 50 ]. MoT mycelial agar blocks measuring 10 mm were treated with 50 μL of antimycin A and Nativo ® 75 WG at 1, 5, and 10 μg/mL and put into Nunc multi-well plates.…”

Section: Methodsmentioning

confidence: 99%

“…The process of plant tissue invasion is accomplished by the penetrating fungal hypha through the host epidermis and invading the plasma membrane of the host [ 8 , 12 , 13 ]. Therefore, disruption of any of these asexual life stages eliminates the possibility of pathogenesis by this fungus [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

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Marine Natural Product Antimycin A Suppresses Wheat Blast Disease Caused by Magnaporthe oryzae Triticum

Paul

Chakraborty

Rahman

et al. 2022

JoF

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The application of chemical pesticides to protect agricultural crops from pests and diseases is discouraged due to their harmful effects on humans and the environment. Therefore, alternative approaches for crop protection through microbial or microbe-originated pesticides have been gaining momentum. Wheat blast is a destructive fungal disease caused by the Magnaporthe oryzae Triticum (MoT) pathotype, which poses a serious threat to global food security. Screening of secondary metabolites against MoT revealed that antimycin A isolated from a marine Streptomyces sp. had a significant inhibitory effect on mycelial growth in vitro. This study aimed to investigate the inhibitory effects of antimycin A on some critical life stages of MoT and evaluate the efficacy of wheat blast disease control using this natural product. A bioassay indicated that antimycin A suppressed mycelial growth (62.90%), conidiogenesis (100%), germination of conidia (42%), and the formation of appressoria in the germinated conidia (100%) of MoT at a 10 µg/mL concentration. Antimycin A suppressed MoT in a dose-dependent manner with a minimum inhibitory concentration of 0.005 μg/disk. If germinated, antimycin A induced abnormal germ tubes (4.8%) and suppressed the formation of appressoria. Interestingly, the application of antimycin A significantly suppressed wheat blast disease in both the seedling (100%) and heading stages (76.33%) of wheat at a 10 µg/mL concentration, supporting the results from in vitro study. This is the first report on the inhibition of mycelial growth, conidiogenesis, conidia germination, and detrimental morphological alterations in germinated conidia, and the suppression of wheat blast disease caused by a Triticum pathotype of M. Oryzae by antimycin A. Further study is required to unravel the precise mode of action of this promising natural compound for considering it as a biopesticide to combat wheat blast.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Marine Natural Product Antimycin A Suppresses Wheat Blast Disease Caused by Magnaporthe oryzae Triticum

Paul

Chakraborty

Rahman

et al. 2022

JoF

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“…Those PGPRs can produce soilfriendly antibiotics. Antibiosis is the process of suppression of various diseases such as wheat blast [59,[89][90][91], downy mildew of grapevine [92], and damping-off disease in sugar beet and spinach [8] by the bacterial metabolites. Some of these metabolites could be utilized as green pesticides for the protection of destructive plant diseases [93].…”

Section: Enhancement Of Plant Stress Tolerancementioning

confidence: 99%

Prospect and Challenges for Sustainable Management of Climate Change-Associated Stresses to Soil and Plant Health by Beneficial Rhizobacteria

et al. 2021

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Climate change imposes biotic and abiotic stresses on soil and plant health all across the planet. Beneficial rhizobacterial genera, such as Bacillus, Pseudomonas, Paraburkholderia, Rhizobium, Serratia, and others, are gaining popularity due to their ability to provide simultaneous nutrition and protection of plants in adverse climatic conditions. Plant growth-promoting rhizobacteria are known to boost soil and plant health through a variety of direct and indirect mechanisms. However, various issues limit the wider commercialization of bacterial biostimulants, such as variable performance in different environmental conditions, poor shelf-life, application challenges, and our poor understanding on complex mechanisms of their interactions with plants and environment. This study focused on detecting the most recent findings on the improvement of plant and soil health under a stressful environment by the application of beneficial rhizobacteria. For a critical and systematic review story, we conducted a non-exhaustive but rigorous literature survey to assemble the most relevant literature (sorting of a total of 236 out of 300 articles produced from the search). In addition, a critical discussion deciphering the major challenges for the commercialization of these bioagents as biofertilizer, biostimulants, and biopesticides was undertaken to unlock the prospective research avenues and wider application of these natural resources. The advancement of biotechnological tools may help to enhance the sustainable use of bacterial biostimulants in agriculture. The perspective of biostimulants is also systematically evaluated for a better understanding of the molecular crosstalk between plants and beneficial bacteria in the changing climate towards sustainable soil and plant health.

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“…The ability of the fungus to disperse long distances is not entirely known but evidence has shown that Pyricularia spores can disperse through air currents up to 1 km distant from the source (Urashima et al 2007), or across continents via infected seeds (Ceresini et al 2018). Although several control methods have been explored in research, including biological control agents (Chakraborty et al 2020a(Chakraborty et al , 2020b, the combination of cultural (Coelho et al 2016), genetic, and chemical control have been commercially feasible and more effective in disease management (Cruz et al 2019;Cruppe et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Sequential post-heading applications for controlling wheat blast: a summary of fungicide performance

Ascari¹,

Barro²,

Santana³

et al. 2021

Preprint

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Wheat blast, caused by Pyricularia oryzae Triticum (PoT) lineage, is a major constraint to wheat production, mainly in the tropics of Brazil where severe epidemics are more frequent. We analyzed disease and wheat yield data from 42 uniform field trials conducted during nine years (2012 to 2020) in order to assess whether the percent control and yield response were influenced by fungicide type, region (tropical or subtropical), and year. Six treatments were selected, all evaluated in at least 19 trials. Two fungicides were applied as solo active ingredients: MANCozeb, and TEBUconazole, and four were premixes: AZOXistrobin + TEBU, TriFLoXistrobin + PROThioconazole, TFLX + TEBU, and PYRAclostrobin + EPOXiconazole. Percent control, calculated from back-transforming estimates by a meta-analysis network model fitted to the log of the means, ranged from 43% to 58%, with all but PYRA + EPOX showing efficacy greater than 52% on average, not differing among them. The variation in both efficacy and yield response were explained by region and all but TEBU performed better in the subtropics than in the tropics. Yield response from using three sequential sprays was around two times greater in the subtropics (319 to 532 kg/ha) than in the tropics (149 to 241.3 kg/ha). No significant decline in fungicide efficacy or yield response were observed in nine years of study for any of the fungicides. Our results reinforce the need to improve control by adopting an integrated management approach in the tropics given the poorer performance and lower profitability, especially for the premixes, than in the subtropics.

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Oligomycins inhibit Magnaporthe oryzae Triticum and suppress wheat blast disease

Cited by 26 publications

References 55 publications

Marine Natural Product Antimycin A Suppresses Wheat Blast Disease Caused by Magnaporthe oryzae Triticum

Marine Natural Product Antimycin A Suppresses Wheat Blast Disease Caused by Magnaporthe oryzae Triticum

Prospect and Challenges for Sustainable Management of Climate Change-Associated Stresses to Soil and Plant Health by Beneficial Rhizobacteria

Sequential post-heading applications for controlling wheat blast: a summary of fungicide performance

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