Influência da intensidade da murcha-de-fusário no rendimento do caupi

Assunção, Iraíldes Pereira; Michereff, Sami Jorge; Mizubuti, Eduardo S. G.; Brommonschenkel, Sérgio Hermínio

doi:10.1590/s0100-41582003000600006

Cited by 9 publications

(4 citation statements)

References 6 publications

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“…tracheiphilum (Fot), a soil-borne fungus, severely challenges cowpea production (Armstrong and Armstrong, 1981). The disease is prevalent in all cowpea growing countries across the world including the United States, central valley of California (Hare, 1953;Smith et al, 1999), Australia (Summerell et al, 2011), Brazil and Nigeria (Armstrong and Armstrong, 1980;Assunção et al, 2003). Four Fot races (1, 2, 3, and 4) have been identified based on their pathogenic reactions to differential cowpea genotypes.…”

Section: Cowpeamentioning

confidence: 99%

Breeding, Genetics, and Genomics Approaches for Improving Fusarium Wilt Resistance in Major Grain Legumes

et al. 2020

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Fusarium wilt (FW) disease is the key constraint to grain legume production worldwide. The projected climate change is likely to exacerbate the current scenario. Of the various plant protection measures, genetic improvement of the disease resistance of crop cultivars remains the most economic, straightforward and environmental-friendly option to mitigate the risk. We begin with a brief recap of the classical genetic efforts that provided first insights into the genetic determinants controlling plant response to different races of FW pathogen in grain legumes. Subsequent technological breakthroughs like sequencing technologies have enhanced our understanding of the genetic basis of both plant resistance and pathogenicity. We present noteworthy examples of targeted improvement of plant resistance using genomics-assisted approaches. In parallel, modern functional genomic tools like RNA-seq are playing a greater role in illuminating the various aspects of plant-pathogen interaction. Further, proteomics and metabolomics have also been leveraged in recent years to reveal molecular players and various signaling pathways and complex networks participating in host-pathogen interaction. Finally, we present a perspective on the challenges and limitations of highthroughput phenotyping and emerging breeding approaches to expeditiously develop FW-resistant cultivars under the changing climate.

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Section: Cowpeamentioning

confidence: 99%

Breeding, Genetics, and Genomics Approaches for Improving Fusarium Wilt Resistance in Major Grain Legumes

et al. 2020

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“…The external symptoms typically become evident during the flowering and early pod development stages resulting in high mortality in the affected areas with severe overall yield loss. Worldwide, the occurrence of Fusarium infecting cowpeas has been reported in the Northern Territory of Australia, northeastern parts of Brazil, and Nigeria (Summerell et al 2011; Assunção et al 2003; Armstrong and Armstrong 1980). Fusarium wilt of cowpea is a significant problem in the United States, especially in the southeastern states and California (Hare 1953).…”

Section: Introductionmentioning

confidence: 99%

Genetic mapping, synteny, and physical location of two loci for Fusarium oxysporum f. sp. tracheiphilum race 4 resistance in cowpea [Vigna unguiculata (L.) Walp]

Pottorff

Ehlers

et al. 2013

Mol Breeding

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Fusarium wilt is a vascular disease caused by the fungus Fusariumoxysporum f.sp. tracheiphilum (Fot) in cowpea [Vignaunguiculata (L.) Walp]. In this study, we mapped loci conferring resistance to Fot race 4 in three cowpea RIL populations: IT93K-503-1 × CB46, CB27 × 24-125B-1, and CB27 × IT82E-18/Big Buff. Two independent loci which confer resistance to Fot race 4 were identified, Fot4-1 and Fot4-2. Fot4-1 was identified in the IT93K-503-1 (resistant) × CB46 (susceptible) population and was positioned on the cowpea consensus genetic map, spanning 21.57–29.40 cM on linkage group 5. The Fot4-2 locus was validated by identifying it in both the CB27 (resistant) × 24-125B-1 (susceptible) and CB27 (resistant) × IT82E-18/Big Buff (susceptible) populations. Fot4-2 was positioned on the cowpea consensus genetic map on linkage group 3; the minimum distance spanned 71.52–71.75 cM whereas the maximum distance spanned 64.44–80.23 cM. These genomic locations of Fot4-1 and Fot4-2 on the cowpea consensus genetic map, relative to Fot3-1 which was previously identified as the locus conferring resistance to Fot race 3, established that all three loci were independent. The Fot4-1 and Fot4-2 syntenic loci were examined in Glycine max, where several disease-resistance candidate genes were identified for both loci. In addition, Fot4-1 and Fot4-2 were coarsely positioned on the cowpea physical map. Fot4-1 and Fot4-2 will contribute to molecular marker development for future use in marker-assisted selection, thereby expediting introgression of Fot race 4 resistance into future cowpea cultivars.Electronic supplementary materialThe online version of this article (doi:10.1007/s11032-013-9991-0) contains supplementary material, which is available to authorized users.

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“…tracheiphilum (E.F. Smith) W.C. Snyder & H.N. Hansen, destaca-se como importante doença na cultura do caupi no Nordeste brasileiro, podendo causar reduções na produção de sementes de até 86 % em cultivares suscetíveis (Assunção et al, 2003). Neste patossistema, o uso de cultivares resistentes tem sido a única alternativa eficiente de controle.…”

Section: Introductionunclassified

Indução de resistência a Fusarium oxysporum f. sp. Tracheiphilum em Caupi: eficiência de indutores abióticos e atividade enzimática elicitada

2006

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RESUMOForam avaliados os efeitos de indutores abióticos em cultivares de caupi inoculadas com Fusarium oxysporum f. sp. tracheiphilum quanto à severidade, controle da doença e atividade enzimática. Para isso, plantas das cultivares IPA-206 e BR-17 Gurguéia com cinco dias de idade foram pulverizadas com soluções aquosas de ASM (5,0 g do i.a./100 L de água), BABA (1,5 mM) e quitosana (2,0 mg/mL), no primeiro par de folhas e inoculadas, após sete dias da germinação, com 20 mL de uma suspensão de 1 x 10 6 conídios/mL do isolado ISO-PE. A avaliação da severidade da doença foi realizada aos 25 dias após a germinação, através de escala de notas e índice de doença. As atividades das enzimas β-1,3-glucanase, peroxidase e fenilalanina amônia liase (PAL) foram determinadas em plantas submetidas aos tratamentos anteriores, coletadas aos cinco e 10 dias após a inoculação. Foi observada diferença significativa entre os indutores e a testemunha, nas duas cultivares testadas, aos cinco e 10 dias, destacando-se o indutor ASM, proporcionando um controle da doença de 68,90% e 71,59% nas cultivares BR-17 Gurguéia e IPA-206, respectivamente. O indutor ASM apresentou melhores resultados nas atividades de β-1,3-glucanase, peroxidase e PAL, destacando-se na cultivar IPA-206 nos dois períodos analisados. Os indutores BABA e quitosana diferiram da testemunha, na atividade de PAL e β-1,3-glucanase, nessa mesma cultivar, aos cinco dias após a inoculação.Palavras-chave adicionais: Murcha de Fusarium, β-1,3-glucanase, peroxidase, fenilalanina amônia liase, resistência sistêmica adquirida. ABSTRACT Induced resistance to Fusarium oxysporum f. sp. tracheiphilum in cowpea plants: effectiveness of abiotic inducers and elicited enzymatic activityThe effect of abiotic inducers in two cowpea cultivars inoculated with Fusarium oxysporum f.sp. tracheiphilum (E. F. Smith) Snyder & Hansen was evaluated in relation to severity, disease control and enzyme activity. Aqueous solution of ASM (5.0 mg/mL), BABA (1.5 mM) or chitosan (2.0 mg/mL) was sprayed on the first pair of leaves of five-day-old cowpea plants, cultivars BR-17 Gurguéia and IPA-206. After seven days of elicitor application, inoculation was carried out with 20 mL of a 1 x 10 6 conidia/mL suspension of the ISO-PE isolate. Plants were harvested at five and 10 days after inoculation, and the activity of phenylalanine ammonia lyase (PAL), β-1.3-glucanase and peroxidase was analyzed. Significant difference between treatment with inducers and control was verified, mainly for ASM which provided a disease control of 68.9% and 71.59% for BR-17 Gurguéia and IPA-206 cultivars, respectively. ASM showed the best results related to β-1.3-glucanase, peroxidase and PAL and activities, especially for the cultivar IPA-206 five or 10 days. BABA and chitosan differed from the control for PAL and β-1.3-glucanase activity on cultivar IPA-206, five days after inoculation.

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Influência da intensidade da murcha-de-fusário no rendimento do caupi

Cited by 9 publications

References 6 publications

Breeding, Genetics, and Genomics Approaches for Improving Fusarium Wilt Resistance in Major Grain Legumes

Breeding, Genetics, and Genomics Approaches for Improving Fusarium Wilt Resistance in Major Grain Legumes

Genetic mapping, synteny, and physical location of two loci for Fusarium oxysporum f. sp. tracheiphilum race 4 resistance in cowpea [Vigna unguiculata (L.) Walp]

Indução de resistência a Fusarium oxysporum f. sp. Tracheiphilum em Caupi: eficiência de indutores abióticos e atividade enzimática elicitada

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