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Panama disease

About: Panama disease is a(n) research topic. Over the lifetime, 256 publication(s) have been published within this topic receiving 6791 citation(s). more


Open accessJournal ArticleDOI: 10.1073/PNAS.95.5.2044
Abstract: Panama disease of banana, caused by the fungus Fusarium oxysporum f. sp. cubense, is a serious constraint both to the commercial production of banana and cultivation for subsistence agriculture. Previous work has indicated that F. oxysporum f. sp. cubense consists of several clonal lineages that may be genetically distant. In this study we tested whether lineages of the Panama disease pathogen have a monophyletic origin by comparing DNA sequences of nuclear and mitochondrial genes. DNA sequences were obtained for translation elongation factor 1α and the mitochondrial small subunit ribosomal RNA genes for F. oxysporum strains from banana, pathogenic strains from other hosts and putatively nonpathogenic isolates of F. oxysporum. Cladograms for the two genes were highly concordant and a partition-homogeneity test indicated the two datasets could be combined. The tree inferred from the combined dataset resolved five lineages corresponding to “F. oxysporum f. sp. cubense” with a large dichotomy between two taxa represented by strains most commonly isolated from bananas with Panama disease. The results also demonstrate that the latter two taxa have significantly different chromosome numbers. F. oxysporum isolates collected as nonpathogenic or pathogenic to other hosts that have very similar or identical elongation factor 1α and mitochondrial small subunit genotypes as banana pathogens were shown to cause little or no disease on banana. Taken together, these results indicate Panama disease of banana is caused by fungi with independent evolutionary origins. more

Topics: Fusarium oxysporum f.sp. cubense (66%), Panama disease (64%), Fusarium oxysporum (61%) more

1,336 Citations

Open accessJournal ArticleDOI: 10.1094/PHYTO-96-0653
01 Jun 2006-Phytopathology
Abstract: Fusarium wilt of banana (also known as Panama disease) is caused by Fusarium oxysporum f. sp. cubense. Where susceptible cultivars are grown, management is limited to the use of pathogen-free planting stock and clean soils. Resistant genotypes exist for some applications, but resistance is still needed in other situations. Progress has been made with this recalcitrant crop by traditional and nontraditional improvement programs. The disease was first reported in Australia in 1876, but did the greatest damage in export plantations in the western tropics before 1960. A new variant, tropical race 4, threatens the trades that are now based on Cavendish cultivars, and other locally important types such as the plantains. Phylogenetic studies indicate that F. oxysporum f. sp. cubense had several independent evolutionary origins. The significance of these results and the future impact of this disease are discussed. more

Topics: Fusarium oxysporum f.sp. cubense (74%), Fusarium wilt (74%), Fusarium oxysporum (66%) more

286 Citations

Open accessJournal ArticleDOI: 10.1094/PHYTO-04-15-0101-RVW
Randy C. Ploetz1Institutions (1)
23 Nov 2015-Phytopathology
Abstract: Banana (Musa spp.) is one of the world's most important fruits. In 2011, 145 million metric tons, worth an estimated $44 billion, were produced in over 130 countries. Fusarium wilt (also known as Panama disease) is one of the most destructive diseases of this crop. It devastated the 'Gros Michel'-based export trades before the mid-1900s, and threatens the Cavendish cultivars that were used to replace it; in total, the latter cultivars are now responsible for approximately 45% of all production. An overview of the disease and its causal agent, Fusarium oxysporum f. sp. cubense, is presented below. Despite a substantial positive literature on biological, chemical, or cultural measures, management is largely restricted to excluding F. oxysporum f. sp. cubense from noninfested areas and using resistant cultivars where the pathogen has established. Resistance to Fusarium wilt is poor in several breeding targets, including important dessert and cooking cultivars. Better resistance to this and other diseases is needed. The history and impact of Fusarium wilt is summarized with an emphasis on tropical race 4 (TR4), a 'Cavendish'-killing variant of the pathogen that has spread dramatically in the Eastern Hemisphere. more

Topics: Fusarium wilt (72%), Fusarium oxysporum f.sp. cubense (69%), Panama disease (65%) more

273 Citations

Open accessJournal ArticleDOI: 10.1094/PDIS.2004.88.6.580
Shin-Chuan Hwang, Wen-hsiung Ko1Institutions (1)
01 Jun 2004-Plant Disease
Abstract: In vitro propagation produces banana clones that arc very diverse. For 'Giant Cavendish', in addition to resistance to Fusarium wilt, the tissue culture method also generated clones with increased resistance to strong wind, heavier fruit bunches, and sweeter fruit. Therefore, it may be an ideal procedure for horticulturists to select banana clones producing fruit with different taste and might be possible for plant pathologists to select clones resistant to other important diseases. The possibility of applying this technique to the improvement of other crops remains to be exploited. Although 40,000 'Cavendish' plants grown from suckers did not show any visible difference in morphology, about 3 percent of 'Cavendish' plantlets derived from tissue culture were variants. Relatively little is known about the cause of genetic instability induced by the in vitro vegetative propagation. Rapid multiplication and development of cells resulting from mediation of regulators in the tissue culture medium may increase the chance of variation. The mechanism by which the somaclones of 'Giant Cavendish' are resistant to Fusarium wilt is unknown. Since the parental 'Giant Cavendish' is very susceptible to Fusarium wilt, the appearance of resistant somaclones may result from activation of silent resistant genes. However, the creation of resistance genes through mutation as the origin of the resistant phenotype cannot be ruled out. DNA technology will be useful in deciphering the true nature of wilt resistance in the future. more

Topics: Cavendish banana (66%), Panama disease (61%), Fusarium wilt (59%) more

199 Citations

Journal ArticleDOI: 10.1016/J.CROPRO.2015.01.007
Randy C. Ploetz1Institutions (1)
01 Jul 2015-Crop Protection
Abstract: Banana (Musa spp.) is an important cash and food crop in the tropics and subtropics. Fusarium wilt, which is also known as Panama disease, is caused by Fusarium oxysporum f. sp. cubense (Foc). It is one of the most destructive diseases of this crop, and has a relatively wide host range. Its greatest impact was on the early ‘Gros Michel’-based export trades. Resistant cultivars of the Cavendish subgroup were used to replace ‘Gros Michel,’ but are now succumbing to a new variant of the pathogen, tropical race 4 (TR4). Although TR4 is only found in the Eastern Hemisphere, it threatens global export and small-holder production of the Cavendish cultivars. Management of this disease is largely restricted to excluding the pathogen from non-infested areas and the use of resistant cultivars where Foc is established. The perennial production of this crop and the polycyclic nature of this disease hinder the development of other management strategies. Measures that are effective against annual or short-lived hosts of these diseases are usually ineffective against Fusarium wilt of banana. Effective biological, chemical and cultural measures are not available, despite a substantial, positive literature on these topics. Critical evaluations of, and realistic expectations for, these measures are needed. Better resistance is needed to this disease, especially that that is caused by TR4. more

Topics: Panama disease (65%), Fusarium oxysporum f.sp. cubense (62%), Fusarium wilt (61%) more

172 Citations

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Topic's top 5 most impactful authors

Randy C. Ploetz

18 papers, 2.8K citations

Gert H. J. Kema

12 papers, 682 citations

Altus Viljoen

8 papers, 236 citations

Fernando Haddad

6 papers, 61 citations

Marino Fernández-Falcón

5 papers, 87 citations

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