scholarly journals Control of Panama disease of banana by intercropping with Chinese chive (Allium tuberosum Rottler): cultivar differences

2020 ◽  
Author(s):  
Zhen-Fang Li ◽  
Tong Wang ◽  
Chenling He ◽  
Kelin Cheng ◽  
Rensen Zeng ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Field Experiments ◽  
Disease Incidence ◽  
Inhibitory Effect ◽  
Cultivar Differences ◽  
Antifungal Compounds ◽  
Panama Disease ◽  
Allium Tuberosum ◽  
Leaf Volatiles ◽  
Chinese Chive

Abstract Panama disease (Fusarium wilt disease) caused by Fusarium oxysporum f. sp. cubense race 4 (FOC) severely threatens banana (Musa spp.) production worldwide. Intercropping of banana with Allium plants has shown a potential to reduce Panama disease. In this study, six cultivars of Chinese chive (Allium tuberosum Rottler) were selected to compare their differences in antifungal activity and active compounds. Three cultivars Duokang Fujiu 11, Fujiuhuang 2, and Duokang Sijiqing with higher levels of antifungal compounds were further used for intercropping with banana in the pots and field to compare their effects on growth and disease incidence of banana. The six cultivars showed significant differences in antifungal activity against FOC mycelia growth in both leaf volatiles and aqueous leachates. The aqueous leachates displayed stronger antifungal activity than the volatiles. FJH cultivar showed the best inhibitory effect among all six cultivars. Contents of three main antifungal compounds dipropyl trisulfide (DPT), dimethyl trisulfide (DMT), and 2-methyl-2-pentenal (MP) in volatiles and aqueous leachates varied considerably among cultivars. Pot and field experiments showed that intercropping with three selected Chinese chive cultivars significantly improved banana vegetative growth, increased photosynthetic characteristics and yield but decreased disease incidence of Panama disease.Our results indicate that intercropping with Chinese chive shows potential to reduce banana Panama disease and selection of appropriate cultivars is vital for effective disease control.

scholarly journals Control of Panama disease of banana by intercropping with Chinese chive (Allium tuberosum Rottler): cultivar differences

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Zhenfang Li ◽  
Tong Wang ◽  
Chenling He ◽  
Kelin Cheng ◽  
Rensen Zeng ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Field Experiments ◽  
Disease Incidence ◽  
Inhibitory Effect ◽  
Cultivar Differences ◽  
Antifungal Compounds ◽  
Panama Disease ◽  
Allium Tuberosum ◽  
Leaf Volatiles ◽  
Chinese Chive

Abstract Panama disease (Fusarium wilt disease) caused by Fusarium oxysporum f. sp. cubense race 4 (FOC) severely threatens banana (Musa spp.) production worldwide. Intercropping of banana with Allium plants has shown a potential to reduce Panama disease. In this study, six cultivars of Chinese chive (Allium tuberosum Rottler) were selected to compare their differences in antifungal activity and active compounds. Three cultivars Duokang Fujiu 11, Fujiuhuang 2, and Duokang Sijiqing with higher levels of antifungal compounds were further used for intercropping with banana in the pots and field to compare their effects on growth and disease incidence of banana. The six cultivars showed significant differences in antifungal activity against FOC mycelia growth in both leaf volatiles and aqueous leachates. The aqueous leachates displayed stronger antifungal activity than the volatiles. FJH cultivar showed the best inhibitory effect among all six cultivars. Contents of three main antifungal compounds dipropyl trisulfide (DPT), dimethyl trisulfide (DMT), and 2-methyl-2-pentenal (MP) in volatiles and aqueous leachates varied considerably among cultivars. Pot and field experiments showed that intercropping with three selected Chinese chive cultivars significantly improved banana vegetative growth, increased photosynthetic characteristics and yield but decreased disease incidence of Panama disease. Our results indicate that intercropping with Chinese chive shows potential to reduce banana Panama disease and selection of appropriate cultivars is vital for effective disease control.

scholarly journals Control of Panama disease of banana by intercropping with Chinese chive (Allium tuberosum Rottler): cultivar differences

2020 ◽  
Author(s):  
Zhen-Fang Li ◽  
Tong Wang ◽  
Chenlin He ◽  
Kelin Cheng ◽  
Rensen Zeng ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Field Experiments ◽  
Disease Incidence ◽  
Inhibitory Effect ◽  
Cultivar Differences ◽  
Antifungal Compounds ◽  
Panama Disease ◽  
Allium Tuberosum ◽  
Leaf Volatiles ◽  
Chinese Chive

Abstract BackgroundPanama disease (Fusarium wilt disease) caused by Fusarium oxysporum f. sp. cubense race 4 (FOC) severely threatens banana (Musa spp.) production worldwide. Intercropping of banana with Allium plants has shown a potential to reduce Panama disease. In this study six cultivars of Chinese chive (Allium tuberosum Rottler) were selected to compare their differences in antifungal activity and active compounds. Three cultivars Duokang Fujiu 11, Fujiuhuang 2, and Duokang Sijiqing with higher levels of antifungal compounds were further used for intercropping with banana in the pots and field to compare their effects on growth and disease incidence of banana.Methods and ResultsThe six cultivars showed significant differences in antifungal activity against FOC mycelia growth in both leaf volatiles and aqueous leachates. The aqueous leachates displayed stronger antifungal activity than the volatiles. FJH cultivar showed the best inhibitory effect among all six cultivars. Contents of three main antifungal compounds dipropyl trisulfide (DPT), dimethyl trisulfide (DMT), and 2-methyl-2-pentenal (MP) in volatiles and aqueous leachates varied considerably among cultivars. Pot and field experiments showed that intercropping with three selected Chinese chive cultivars significantly improved banana vegetative growth, increased photosynthetic characteristics and yield but decreased disease incidence of Panama disease.ConclusionsOur results indicate that intercropping with Chinese chive shows potential to reduce banana Panama disease and selection of appropriate cultivars is vital for effective disease control.

scholarly journals Control of Panama disease of banana by intercropping with Chinese chive (Allium tuberosum Rottler): cultivar differences

2020 ◽  
Author(s):  
Zhen-Fang Li ◽  
Tong Wang ◽  
Chenlin He ◽  
Kelin Cheng ◽  
Rensen Zeng ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Field Experiments ◽  
Disease Incidence ◽  
Inhibitory Effect ◽  
Cultivar Differences ◽  
Antifungal Compounds ◽  
Panama Disease ◽  
Allium Tuberosum ◽  
Leaf Volatiles ◽  
Chinese Chive

Abstract Panama disease (Fusarium wilt disease) caused by Fusarium oxysporum f. sp. cubense race 4 (FOC) severely threatens banana (Musa spp.) production worldwide. Intercropping of banana with Allium plants has shown a potential to reduce Panama disease. In this study, six cultivars of Chinese chive ( Allium tuberosum Rottler) were selected to compare their differences in antifungal activity and active compounds. Three cultivars Duokang Fujiu 11, Fujiuhuang 2, and Duokang Sijiqing with higher levels of antifungal compounds were further used for intercropping with banana in the pots and field to compare their effects on growth and disease incidence of banana. The six cultivars showed significant differences in antifungal activity against FOC mycelia growth in both leaf volatiles and aqueous leachates. The aqueous leachates displayed stronger antifungal activity than the volatiles. FJH cultivar showed the best inhibitory effect among all six cultivars. Contents of three main antifungal compounds dipropyl trisulfide (DPT), dimethyl trisulfide (DMT), and 2-methyl-2-pentenal (MP) in volatiles and aqueous leachates varied considerably among cultivars. Pot and field experiments showed that intercropping with three selected Chinese chive cultivars significantly improved banana vegetative growth, increased photosynthetic characteristics and yield but decreased disease incidence of Panama disease. Our results indicate that intercropping with Chinese chive shows potential to reduce banana Panama disease and selection of appropriate cultivars is vital for effective disease control.

scholarly journals Control of Panama disease of banana by intercropping with Chinese chive (Allium tuberosum Rottler): cultivar differences

2020 ◽  
Author(s):  
Zhen-Fang Li ◽  
Tong Wang ◽  
Chenling He ◽  
Kelin Cheng ◽  
Rensen Zeng ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Field Experiments ◽  
Disease Incidence ◽  
Inhibitory Effect ◽  
Cultivar Differences ◽  
Antifungal Compounds ◽  
Panama Disease ◽  
Allium Tuberosum ◽  
Leaf Volatiles ◽  
Chinese Chive

Abstract Panama disease (Fusarium wilt disease) caused by Fusarium oxysporum f. sp. cubense race 4 (FOC) severely threatens banana (Musa spp.) production worldwide. Intercropping of banana with Allium plants has shown a potential to reduce Panama disease. In this study, six cultivars of Chinese chive ( Allium tuberosum Rottler) were selected to compare their differences in antifungal activity and active compounds. Three cultivars Duokang Fujiu 11, Fujiuhuang 2, and Duokang Sijiqing with higher levels of antifungal compounds were further used for intercropping with banana in the pots and field to compare their effects on growth and disease incidence of banana. The six cultivars showed significant differences in antifungal activity against FOC mycelia growth in both leaf volatiles and aqueous leachates. The aqueous leachates displayed stronger antifungal activity than the volatiles. FJH cultivar showed the best inhibitory effect among all six cultivars. Contents of three main antifungal compounds dipropyl trisulfide (DPT), dimethyl trisulfide (DMT), and 2-methyl-2-pentenal (MP) in volatiles and aqueous leachates varied considerably among cultivars. Pot and field experiments showed that intercropping with three selected Chinese chive cultivars significantly improved banana vegetative growth, increased photosynthetic characteristics and yield but decreased disease incidence of Panama disease. Our results indicate that intercropping with Chinese chive shows potential to reduce banana Panama disease and selection of appropriate cultivars is vital for effective disease control.

scholarly journals Control of Panama Disease of Banana by Intercropping with Chinese Chive (Allium tuberosum Rottler): Cultivar Differences

2020 ◽  
Author(s):  
Zhen-Fang Li ◽  
Tong Wang ◽  
Chenlin He ◽  
Kelin Cheng ◽  
Rensen Zeng ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Field Experiments ◽  
Disease Incidence ◽  
Cultivar Differences ◽  
Antifungal Compounds ◽  
Panama Disease ◽  
Allium Tuberosum ◽  
Leaf Volatiles ◽  
Chinese Chive ◽  
Selection Of

Abstract Highlightsl Intercropping of banana with Chinese chive can effectively reduce Panama diseasel Selection of appropriate cultivars of Chinese chive for intercropping is criticall 2-Methyl-2-pentenal (MP) is the key compound for the pathogen inhibitionl MP content and antifungal activity are key indices for cultivar selectionBackground Panama disease (Fusarium wilt disease) caused by Fusarium oxysporum f. sp. cubense race 4 (FOC) severely threatens banana (Musa spp.) production worldwide. Intercropping of banana with Allium plants has shown a potential to reduce Panama disease. In this study six cultivars of Chinese chive (Allium tuberosum Rottler) were selected to compare their differences in antifungal activity and active compounds. Three cultivars Duokang Fujiu 11, Fujiuhuang 2, and Duokang Sijiqing with higher levels of antifungal compounds were further used for intercropping with banana in the pots and field to compare their effects on growth and disease incidence of banana. Methods and Results The six cultivars showed significant differences in antifungal activity against FOC mycelia growth in both leaf volatiles and aqueous leachates. The aqueous leachates displayed stronger antifungal activity than the volatiles. Contents of three main antifungal compounds dipropyl trisulfide (DPT), dimethyl trisulfide (DMT), and 2-methyl-2-pentenal (MP) in volatiles and aqueous leachates varied considerably among cultivars. Pot and field experiments showed that intercropping with three selected Chinese chive cultivars significantly improved banana vegetative growth, increased photosynthetic characteristics and yield but decreased disease incidence of Panama disease.Conclusions Our results indicate that intercropping with Chinese chive shows potential to reduce banana Panama disease and selection of appropriate cultivars is vital for effective disease control.

scholarly journals Resistance to sharp eyespot in wheat

2012 ◽  
Vol 65 ◽  
pp. 204-212
Author(s):  
M.G. Cromey ◽  
C.C.L. Hide ◽  
E.D. Meenken
Keyword(s):  
Primary Infection ◽  
Field Experiments ◽  
Disease Incidence ◽  
Greenhouse Experiment ◽  
Cultivar Differences ◽  
Growth Stages ◽  
Resistant Cultivars ◽  
Sharp Eyespot ◽  
Breeding Programmes ◽  
Low Incidence

Susceptibility of 16 wheat cultivars to sharp eyespot (caused by Rhizoctonia cerealis) was examined in field experiments Disease incidence varied markedly between experiments but one cultivar Regency consistently had very low incidence which was confirmed in a greenhouse experiment Some cultivars had a high incidence of disease in some field experiments but most cultivars had intermediate incidence A greenhouse experiment provided some evidence for pathogenic variation in R cerealis Monitoring of disease progression in commercial crops confirmed the cultivar differences identified in field experiments Infection was greater in crops sown in midautumn than in lateautumn to winter Primary infection occurred during seedling growth stages with maximum disease incidence occurring by late spring Primary infection developed in resistant cultivars but there was little spread to inner leaf sheaths Selection for resistance to sharp eyespot is feasible in breeding programmes and commercial losses could be reduced by using the more resistant cultivars

scholarly journals Synthesis and Biological Activity of New Antifungal Compounds: A Preliminary Study

2018 ◽  
Vol 6 (5) ◽  
Author(s):  
Jorge A. Cabezas ◽  
José A. Brenes ◽  
Norma Gross ◽  
María L. Arias
Keyword(s):  
Biological Activity ◽  
Antifungal Activity ◽  
Trichophyton Rubrum ◽  
Inhibitory Effect ◽  
Clinical Isolates ◽  
Antifungal Compounds ◽  
Ciclopirox Olamine ◽  
Preliminary Study ◽  
Nail Infection

In the present study, we synthesized three 1,3-enynes from their corresponding aldehydes. They exhibited antifungal activity, which was evaluated against Trichophyton rubrum, the most common dermatophyte responsible for nail infection. The biological activity of these synthetic enynes was compared to terbinafine and ciclopirox olamine, two common antimycotic drugs used to treat nail infections caused by this pathogen. Two of these compounds showed an inhibitory effect similar to terbinafine and cilopirox olamine, when tested against over eleven different T. rubrum strains, including ATCC 28188 strain and ten different clinical isolates, two already classified as multitreated.

scholarly journals Antifungal Activity of Capridine β as a Consequence of Its Biotransformation into Metabolite Affecting Yeast Topoisomerase II Activity

Pathogens ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 189
Author(s):  
Iwona Gabriel ◽  
Kamila Rząd ◽  
Ewa Paluszkiewicz ◽  
Katarzyna Kozłowska-Tylingo
Keyword(s):  
Antifungal Activity ◽  
Fungal Pathogens ◽  
Topoisomerase Ii ◽  
Fungal Infections ◽  
Inhibitory Effect ◽  
Antifungal Compounds ◽  
Metabolite Formation ◽  
Frequent Use ◽  
Fungal Dna ◽  
Inhibitory Potential

In the last few years, increasing importance is attached to problems caused by fungal pathogens. Current methods of preventing fungal infections remain unsatisfactory. There are several antifungal compounds which are highly effective in some cases, however, they have limitations in usage: Nephrotoxicity and other adverse effects. In addition, the frequent use of available fungistatic drugs promotes drug resistance. Therefore, there is an urgent need for the development of a novel antifungal drug with a different mechanism of action, blocking of the fungal DNA topoisomerases activity appear to be a promising idea. According to previous studies on the m-AMSA moderate inhibitory effect on fungal topoisomerase II, we have decided to study Capridine β (also acridine derivative) antifungal activity, as well as its inhibitory potential on yeast topoisomerase II (yTOPOII). Results indicated that Capridine β antifungal activity depends on the kind of strains analyzed (MICs range 0.5–64 μg mL−1) and is related to its biotransformation in the cells. An investigation of metabolite formation, identified as Capridine β reduction product (IE1) by the fungus Candida albicans was performed. IE1 exhibited no activity against fungal cells due to an inability to enter the cells. Although no antifungal activity was observed, in contrast to Capridine β, biotransformation metabolite totally inhibited the yTOPOII-mediated relaxation at concentrations lower than detected for m-AMSA. The closely related Capridine β only slightly diminished the catalytic activity of yTOPOII.

scholarly journals Diffusible Compounds Produced by Hanseniaspora osmophila and Gluconobacter cerinus Help to Control the Causal Agents of Gray Rot and Summer Bunch Rot of Table Grapes

Antibiotics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 664
Author(s):  
Matías Olivera ◽  
Ninoska Delgado ◽  
Fabiola Cádiz ◽  
Natalia Riquelme ◽  
Iván Montenegro ◽  
...  
Keyword(s):  
Mycelial Growth ◽  
Inhibitory Effect ◽  
Biocontrol Agents ◽  
Environmental Cost ◽  
Antifungal Compounds ◽  
Table Grapes ◽  
Dual Cultures ◽  
Bunch Rot ◽  
Direct Bioautography

Gray and summer bunch rot are important diseases of table grapes due to the high economic and environmental cost of their control with synthetic fungicides. The ability to produce antifungal compounds against the causal agents Botrytis, Aspergillus, Penicillium, and Rhizopus of two microorganisms isolated from table grapes and identified as Hanseniaspora osmophila and Gluconobacter cerinus was evaluated. In dual cultures, both biocontrol agents (together and separately) inhibited in vitro mycelial growth of these pathogens. To identify the compounds responsible for the inhibitory effect, extractions were carried out with organic solvents from biocontrol agents separately. Through dual cultures with pathogens and pure extracts, only the hexane extract from H. osmophila showed an inhibitory effect against Botrytis cinerea. To further identify these compounds, the direct bioautography technique was used. This technique made it possible to determine the band displaying antifungal activity at Rf = 0.05–0.2. The compounds present in this band were identified by GC-MS and compared to the NIST library. The most abundant compounds, not previously reported, corresponded to alkanes, ketones, alcohols, and terpenoids. H. osmophila and G. cerinus have the potential to control the causal agents of gray and summer bunch rot of table grapes.

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