scholarly journals Bjerkandera adusta M1 inhibits Fusarium oxysporum and prevents the wilt incidence in Brassica napus

2019 ◽  
Author(s):  
xiao feng ◽  
Yong Li ◽  
Suping Li ◽  
Yifan Lu ◽  
Jingjie Zhang ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Cell Membrane ◽  
Fusarium Oxysporum ◽  
Fusarium Wilt ◽  
Fermentation Broth ◽  
Wilt Disease ◽  
Disease Index ◽  
Cell Membrane Permeability ◽  
Bjerkandera Adusta ◽  
Fusarium Wilt Disease

Abstract Background: Bjerkandera adusta degrades polycyclic aromatic compounds, such as cellulose and lignin, with the production of laccase and peroxidase. However, its effect on plant disease is unknown. Results: In this study, both the confrontation culture and greenhouse pot experiments were carried out to address the biocontrol mechanisms of B. adusta M1, which was isolated from a unique purple soil (Eutric Regosol), on the growth of pathogenic Fusarium oxysporum f. sp. conglutinans (FOC) and incidence of fusarium wilt in Brassica napus. Results showed that the hyphal growth rate of B. adusta M1 was significantly greater than that of FOC, indicating a strong competitiveness by B. adusta M1. In addition, the B. adusta M1 fermentation broth significantly inhibited the growth of FOC hyphae by 62.79±1.80%, which was greater than an inhibition rate of 40.63±1.68% by the chemical fungicide carbendazim. The image from a scanning electron microscope showed the hyphae of FOC directly was penetrated by the B. adusta M1 hyphae, indicating a strong mycoparasitism by B. adusta M1. Besides, both the B. adusta M1 and B. adusta M1 fermentation broth reduced the incidence and disease index of the fusarium wilt in Brassica napus leaves, and the control effects of different treatments against fusarium wilt were 57.09% and 47.67%, respectively, which were comparable better to 46.11% of the chemical fungicide carbendazim. Furthermore, both the B. adusta M1 and B. adusta M1 fermentation broth increased the activity of superoxide dismutase, catalase, peroxidase and phenylalanine ammonia-lyase, which related to an enhancement of disease resistance. Similarly, both the B. adusta M1 and B. adusta M1 fermentation broth decreased the cell membrane permeability and malondialdehyde contents, thereby reducing the cell membrane damage from the pathogenic fungus. Conclusion: In summary, results from this present study demonstrated that both the Bjerkandera adusta M1 and B. adusta M1 fermentation broth inhibited the growth of FOC and decreased the incidence and disease index of the fusarium wilt disease in Brassica napus. Therefore, B. adusta M1 could be applied as a potential biocontrol fungus to against the fusarium wilt disease.

scholarly journals EVALUASI KETAHANAN AKSESI KENAF (Hibiscus cannabinus L.) TERHADAP PENYAKIT LAYU Fusarium oxysporum SCHLECT

2020 ◽  
Vol 6 (2) ◽  
pp. 29
Author(s):  
GEMBONG DALMADIYO ◽  
CECE SUHARA ◽  
SUPRIYONO SUPRIYONO ◽  
SUDJINDRO SUDJINDRO
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Wilt ◽  
Wilt Disease ◽  
Hibiscus Cannabinus ◽  
Resistant Variety ◽  
Fusarium Wilt Disease ◽  
Screen House

<p><strong>Evaluation on the resistance of kenaf accessions (Hibis¬ cus cannabinus /..) to Fusarium oxysporum Schlect</strong></p><p>Resistant variety is one of the most important components controlling of fusarium wilt disease on kenaf caused by Fusarium oxysporum Schlect. To ind out resistant variety an evaluation on kenaf accessions was conducted in the laboratory and screen house of Phytopathology, RITFC, Malang in June-December 1997. The results of the selection on 77 accessions showed that 41 accessions were highly resistant, 1 2 accessions were resistant, 7 accessions were moderate, 12 accessions were susceptible, and 5 accessions were highly susceptible Three resistant and highly resistant accessions were namely 85-9-73, DS/005 H, and FJ/004 He could inhibit F. oxysporum growth about 23.40- 32.43 mm and its discolorisation about 0.0-13.4%.</p>

scholarly journals Newly Isolated Streptomyces sp. JBS5-6 as a Potential Biocontrol Agent to Control Banana Fusarium Wilt: Genome Sequencing and Secondary Metabolite Cluster Profiles

2020 ◽  
Vol 11 ◽  
Author(s):  
Tao Jing ◽  
Dengbo Zhou ◽  
Miaoyi Zhang ◽  
Tianyan Yun ◽  
Dengfeng Qi ◽  
...  
Keyword(s):  
Fusarium Wilt ◽  
Complete Genome ◽  
Biocontrol Agent ◽  
Fermentation Broth ◽  
Membrane Integrity ◽  
Gene Clusters ◽  
Wilt Disease ◽  
Gas Chromatography Mass Spectrometry ◽  
Fusarium Wilt Disease ◽  
Potential Biocontrol Agent

Banana is a key staple food and fruit in countries all over the world. However, the development of the global banana industry is seriously threatened by Fusarium wilt disease, which is caused by Fusarium oxysporum f. sp. cubense (Foc). In particular, Foc tropical race 4 (Foc TR4) could infect more than 80% of global banana and plantain crops. Until now, there were no commercial chemicals or resistant cultivars available to control the disease. Biological control using actinomycetes is considered a promising strategy. In this study, 88 actinomycetes were isolated from a banana orchard without symptoms of Fusarium wilt disease for more than 10 years. An actinobacterial strain labeled as JBS5-6 has exhibited strong antifungal activities against Foc TR4 and other selected 10 phytopathogenic fungi. Based on phenotypic and biochemical traits as well as complete genome analysis, strain JBS5-6 was assigned to Streptomyces violaceusniger. Extracts of the strain inhibited the mycelial growth and spore germination of Foc TR4 by destroying membrane integrity and the ultrastructure of cells. The complete genome of strain JBS5-6 was sequenced and revealed a number of key function gene clusters that contribute to the biosynthesis of active secondary metabolites. Sixteen chemical compounds were further identified by gas chromatography-mass spectrometry (GC-MS). 5-hydroxymethyl-2-furancarboxaldehyde was one of the dominant components in strain JBS5-6 extracts. Moreover, fermentation broth of strain JBS5-6 significantly reduced the disease index of banana seedlings by inhibiting the infection of Foc TR4 in a pot experiment. Hence, strain JBS5-6 is a potential biocontrol agent for the management of disease and the exploitation of biofertilizer.

scholarly journals Biological management of fusarium wilt on tomato caused by Fusarium oxysporum f. sp. lycospersici by some plant growth-promoting bacteria

2020 ◽  
Author(s):  
Halima Z. Hussein ◽  
Shaker I. Al-Dulaimi
Keyword(s):  
Fusarium Oxysporum ◽  
Disease Severity ◽  
Fusarium Wilt ◽  
Wilt Disease ◽  
Systemic Resistance ◽  
Control Treatment ◽  
Plant Growth Promoting Bacteria ◽  
Tomato Plants ◽  
Fusarium Wilt Disease ◽  
Infection Percentage

AbstractChemical approaches have been applied to combat Fusarium wilt disease for a long time. Even though pesticides are effective in controlling the disease, they continue to damage the environment. Environmental-friendly approaches to manage plant disease are the goal of many studies recently. This study was conducted to assess the efficacy of some bio-agents in induction of systemic resistance in tomato plants as a management approach of Fusarium wilt disease caused by Fusarium oxysporum f.sp. lycopersici (FOL) under condition Plastic house. Results of the plastic house experiments showed that all treatments in decreased Fusarium disease percentage and severity on tomato, two bacterial combinations (Streptomyces sp. (St) and Pseudomonas fluorescence (Pf)) decreased the infection percentage and disease severity with 16.6% and 8.3%, respectively. Treatment with St reduced the infection percentage and disease severity with 33.3% and 22.8%, while the Pf treatment showed 41.6% and 31.2% reduction in infection percentage and disease severity, compared to 100% and 91.6% in the control treatment. Results of induced systemic resistance (ISR) biochemical indicators showed significant differences in tomato plants. Peroxidase and Phenylalanine-Ammonia-Lyase (PAL) activity and the Phenol content increased significantly 14 days after treatments compared to the control treatment, which contains only the fungal pathogen FOL.

Sign in / Sign up

Export Citation Format

Share Document