Resistance and susceptibility of mandarins and their hybrids to Alternaria alternata

Pacheco, Camilla de Andrade; Martelli, Ivan Bortolato; Polydoro, Denis Augusto; Schinor, Evandro Henrique; Pio, Rose Mary; Kupper, Kátia Cristina; Azevedo, Fernando Alves de

doi:10.1590/s0103-90162012000600007

Cited by 20 publications

(12 citation statements)

References 15 publications

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“…Resistant varieties are not affected by ABS, even under conditions involving tissue injury (data not shown), this finding confirms the resistance of these genotypes described in other studies (PACHECO et al, 2012). One important aspect of these findings is related to the mechanism of Alternaria alternata attack and host defense.…”

Section: A Mancha Marrom De Altenária Ou Mma (Alternaria Alternata)supporting

confidence: 89%

Positive relationship between citrus leaf miner and alternaria brown spot

et al. 2015

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Section: A Mancha Marrom De Altenária Ou Mma (Alternaria Alternata)supporting

confidence: 89%

Positive relationship between citrus leaf miner and alternaria brown spot

et al. 2015

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“…An example of cross-breedings is the one between the Pera sweet orange, which is CVC susceptible and resistant to Alternaria brown spot with Murcott tangor or Cravo mandarin, both resistant to CVC, and Murcott tangor susceptible to Alternaria brown spot (Oliveira et al, 2002;Bastianel et al, 2004;Souza et al, 2006;Machado, Cristofany-Yaly, & Bastianel, 2011;Figueiredo et al, 2012;Pacheco et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Sensory Analysis of New Varieties of Citrus as a Complementary Strategy to the Brazilian Citriculture

Castro¹,

Mauricio²,

Cristofani–Yaly³

et al. 2013

JAS

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In Brazil new varieties of citrus were selected along the years, but none sensory analysis is usually made to verify the acceptance as one of the bottleneck for fresh citrus juice industry and before the commercial release. We have evaluated the response of consumers (n=62) for eight new hybrids of the crossing between sweet orange and mandarin in five sensory attributes and used analysis of variance Tukey's procedure (HSD) and internal preference mapping for the data processing. The results were compared in relation to their standard physical-chemical characteristics and with commercial varieties: Murcott tangor (Citrus sinensis (L.) Osbeck x Citrus reticulata Blanco), Pera sweet orange (Citrus sinensis (L.) Osbeck, Cravo mandarin (Citrus reticulata Blanco). Hybrids TM x LP 222 and TC x LP 5 are candidates to become variety and TM x LP 94 was chosen for new sensory analysis. Flavor featured as the most important parameter for orange juice and some hybrids with adequate physical-chemical parameters presented low acceptance, while others with inadequate parameters showed good acceptability, what suggests a new way to fruit selection.

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“…Inoculation was performed using a sprayer, applying approximately 2 mL of the conidial suspension per leaf. 11,12 After inoculation, the shoot tips were covered with plastic bags to create a microenvironment of high humidity. Plastic bags were removed 48 h post inoculation, and symptoms were evaluated.…”

Section: Preparation Of Plant Samples For a Alternate Inoculationmentioning

confidence: 99%

Rapid Detection of ACTG- and AK-Toxins inAlternaria alternataby LC-ESI-MS/MS Analysis and Antifungal Properties of Citrus Compounds

Prieto¹,

Medeiros²,

Isidoro³

et al. 2016

Journal of the Brazilian Chemical Society

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A methanol-soluble fraction of the dichloromethane extract from the culture broth of A. alternata AT4303 strain afforded the following five known mycotoxins: alternariol, alternariol monomethyl ether, altenusin, altenuene and altertoxin I. A hexane-soluble fraction of the dichloromethane extract yielded the steroids ergosterol and ergosterol peroxide, and alternariol monomethyl ether. The concentrated ethyl acetate extract afforded the nucleoside uridine, uracil and inosine. The micro-extracts obtained from this strain in solid media were analyzed using liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS), and the following five known toxins were identified: ACTG-C, D, E and F and AK-toxin II. The major toxins produced by the tangerine pathotype ACT-toxins appear to be absent in strain AT4303. However, the low concentration of ACT-toxins appears to be responsible for their lack of detection in this study. Some compounds isolated from citrus plants were tested for in vitro activity against this strain. The results indicated that 17.3 µM apigenin-7-O-rutinoside inhibited by 80% conidial germination and appressorium development.

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Resistance and susceptibility of mandarins and their hybrids to Alternaria alternata

Cited by 20 publications

References 15 publications

Positive relationship between citrus leaf miner and alternaria brown spot

Positive relationship between citrus leaf miner and alternaria brown spot

Sensory Analysis of New Varieties of Citrus as a Complementary Strategy to the Brazilian Citriculture

Rapid Detection of ACTG- and AK-Toxins inAlternaria alternataby LC-ESI-MS/MS Analysis and Antifungal Properties of Citrus Compounds

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