Evaluation of Musa SPP for Susceptibility to Nematodes and Study of Resistance Mechanisms

Fogain, R.

doi:10.17660/actahortic.2000.540.24

Cited by 7 publications

(4 citation statements)

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“…For example, high numbers of constitutive phenolic cells in R. similis-tolerant cvs Yangambi (Km-5) (Musa AAA) and Gros Michel (Musa AAA), and increased lignification in other resistant cultivars, such as cv. Pisang Jari Buaya (Musa AA), resulted in reduced nematode numbers in roots compared with the susceptible cultivars (Fogain & Gowen, 1996;Valette et al, 1998;Fogain, 2000;Devi et al, 2008). A correlation between phenylpropanoid pathway enzymes and nematode resistance in banana (Musa spp.)…”

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confidence: 67%

Effect of Fusarium oxysporum endophyte inoculation on the activities of phenylpropanoid pathway enzymes and Radopholus similis numbers in susceptible and tolerant East African Highland bananas

Paparu

Dubois

Coyne

et al. 2010

Nematol

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Phenylpropanoid pathway enzymes are involved in plant defence pathways leading to lignification, synthesis of secondary metabolites, such as salicylic acid and phytoalexins, wound healing and the oxidative burst. Endophytic non-pathogenic Fusarium oxysporum isolate V5w2 has been reported to show antagonistic effects against Radopholus similis in the screenhouse. An experiment was designed to study root biochemical changes (PAL, POX and PPO activities) and R. similis numbers in susceptible and tolerant bananas following inoculation with isolate V5w2. Constitutive expression of PAL and PPO were similar between the susceptible and tolerant cultivars, while constitutive POX activity was higher in the tolerant cultivar. PAL activity was suppressed in both cultivars 7 days after endophyte inoculation (7 dai), but was significantly up-regulated in the susceptible cv. Nabusa at 30 days post nematode challenge (dpnc) in endophyte-inoculated plants. In the tolerant cultivar, PAL activity was up-regulated in R. similis-challenged plants at 7 and 30 dpnc, irrespective of endophyte inoculation. POX and PPO were transiently up-regulated in cv. Nabusa 7 dai, exceeding levels observed in non-inoculated plants of the same cultivar. POX activity was up-regulated at 7 dpnc in endophyte-inoculated cv. Nabusa plants challenged with R. similis. In the tolerant cultivar, POX and PPO activities were similarly up-regulated in R. similis-challenged plants at 7 dpnc, irrespective of endophyte inoculation. The findings of this study implicate PAL, POX and PPO in banana defence against the root-burrowing nematode R. similis. Our findings further demonstrate the ability of endophytic F. oxysporum isolate V5w2 directly to induce POX and prime PAL in the susceptible cv. Nabusa for greater up-regulation following R. similis challenge.

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confidence: 67%

Effect of Fusarium oxysporum endophyte inoculation on the activities of phenylpropanoid pathway enzymes and Radopholus similis numbers in susceptible and tolerant East African Highland bananas

Paparu

Dubois

Coyne

et al. 2010

Nematol

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“…The higher total phenol, tannin and lignin in the roots were attributed to polyphenol oxidase, phenylalanine ammonia lyase, ascorbic acid oxidase and peroxidase activities. Fogain (1996) and Valette et al (1997) found higher amounts of phenolics in the resistant cultivar Yangambi km 5. Increased activity of peroxidase in tomato, phenylalanine ammonia lyase in brinjal was positively correlated with nematode resistance (Rajasekar et al, 1997;Sirohi and Dasgupta, 1993).…”

Section: Discussionmentioning

confidence: 90%

Screening of in vitro derived mutants of banana against nematodes

Kumar¹,

Kumar²,

Poornima³

et al. 2012

Afr. J. Biotechnol.

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Investigations were carried out to screen the in vitro derived mutants of banana cv. Robusta (Caveidish-AAA) and Rasthali (Silk-AAB) by using certain bio-chemical parameters including some enzyme activities. The mutants tested were Ro Im V 4 6-1-1, Ro Im V 4 6-1-2, Ro Im V 4 6-2-1, Si Im V 4 10-5-3, Si Im V 4 6-2-5 along with respective susceptible checks (Robusta and Rasthali), tolerant check (Anaikomban-AA) and resistant check (Pisang Lilin-AA). Various biochemical assays used were total phenol, tannin content, lignin content, peroxidase, polyphenol oxidase, phenyl alanine ammonia lyase and ascorbic acid oxidase. The results revealed that the mutants namely Ro Im V 4 6-1-1 and Si Im V 4 10-5-3 were found to be resistant while the mutant Ro Im V 4 6-2-1 was moderately resistant. The rest of the mutants namely Ro Im V 4 6-1-2 and Si Im V 4 6-2-5 were found to be susceptible to nematodes. The resistant and moderately resistant mutants of banana could be further used in breeding programmes as well as being recognized as potential cultivars of commerce.

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“…Cultivar Long Tavoy was susceptible to R. similis. Fogain (2000) reported cv. Long Tavoy as susceptible to R. similis in pot trials.…”

Section: Discussionmentioning

confidence: 99%

Host plant resistance to Radopholus similis in a diploid banana hybrid population

Dochez

Tenkouano

Ortíz

et al. 2009

Nematol

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The objective of the research was to study the genetics of host plant resistance to Radopholus similis in a diploid banana population. Screening of a hybrid population and determination of the segregation ratios can provide information on the inheritance and number of alleles controlling this trait in banana. The diploid banana hybrid population used was derived by crossing the diploid hybrids TMB2x 6142-1 and TMB2x 8075-7. The diploid banana hybrid population was evaluated with the individual root inoculation method using an R. similis population from Namulonge, Uganda. Of the 81 hybrids evaluated, 37 hybrids were resistant, 13 hybrids were partially resistant and 31 hybrids were susceptible to R. similis. After chi-square analysis, the results indicated that resistance to R. similis is controlled by two dominant genes, A and B, both with additive and interactive effects, whereby recessive bb suppresses dominant A.

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Evaluation of Musa SPP for Susceptibility to Nematodes and Study of Resistance Mechanisms

Cited by 7 publications

References 0 publications

Effect of Fusarium oxysporum endophyte inoculation on the activities of phenylpropanoid pathway enzymes and Radopholus similis numbers in susceptible and tolerant East African Highland bananas

Effect of Fusarium oxysporum endophyte inoculation on the activities of phenylpropanoid pathway enzymes and Radopholus similis numbers in susceptible and tolerant East African Highland bananas

Screening of in vitro derived mutants of banana against nematodes

Host plant resistance to Radopholus similis in a diploid banana hybrid population

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