Biological characteristics and isolation of Pythium ultimum causing rot of Chinese cabbage

Li, Jiaxi; Zhang, Yaowei

doi:10.1007/s13313-020-00692-x

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…To determine the conditions suitable for the occurrence of different pathogens, it is essential to investigate their biological characteristics [35,36]. The findings of previous studies on the biological characteristics of F. graminearum were similar to ours, indicating that the optimal temperature for F. graminearum mycelial growth is 25 °C; optimal pH…”

Section: Discussionsupporting

confidence: 76%

Identification of the Causal Agent of Brown Leaf Spot on Kiwifruit and Its Sensitivity to Different Active Ingredients of Biological Fungicides

et al. 2022

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Kiwifruit (Actinidia chinensis) is an important commercial crop in China, and the occurrence of diseases may cause significant economic loss in its production. In the present study, a new pathogen that causes brown leaf spot disease on kiwifruit was reported. The fungus was isolated from an infected sample and identified as Fusarium graminearum based on morphological and molecular evaluation. Koch’s postulates were confirmed when the pathogen was re-isolated from plants with artificially induced symptoms and identified as F. graminearum. Based on the biological characteristics of the pathogen, it was determined that: its optimal growth temperature was 25 °C; optimal pH was 7; most suitable carbon source was soluble starch; most suitable nitrogen source was yeast powder; and best photoperiod was 12 h light/12 h dark. Further investigations were conducted by determining 50% effective concentrations (EC50) of several active ingredients of biological fungicides against F. graminearum. The results showed that among the studied fungicides, tetramycin and honokiol had the highest antifungal activity against this pathogen. Our findings provide a scientific basis for the prevention and treatment of brown leaf spot disease on kiwifruit.

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Section: Discussionsupporting

confidence: 76%

Identification of the Causal Agent of Brown Leaf Spot on Kiwifruit and Its Sensitivity to Different Active Ingredients of Biological Fungicides

et al. 2022

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“…The rice seedling blight disease commonly occurs during the seedling stage, particularly when seedlings are grown in greenhouses [48]. Based on the observed biological characteristics of P. aristosporum causing rice seedling blight, its optimum growth conditions were in temperatures ranging from 25-30 • C, pH levels from 6.0 to 7.0, and a photoperiod of 24 h. These conditions were consistent with those previously used to produce rice seedlings in northeastern China [49,50], in which it has been previously demonstrated that Pythium activity is easily affected by environmental factors such as light, temperature, and pH [51][52][53].…”

Section: Discussionsupporting

confidence: 86%

Characterisation of Pythium aristosporum Oomycete—A Novel Pathogen Causing Rice Seedling Blight in China

Liu

Zhang

et al. 2022

JoF

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Rice seedling blight is a globally occurring seedling disease caused by multiple pathogens. It is currently the most common disease affecting rice production in northeast China; hence, determining the causal agents, including its biological characteristics, host range, and fungicide efficacy is vital for its effective management. The present study obtained 45 pathogenic isolates from diseased rice seedlings in Suihua, Heilongjiang Province, China. Of these, five pathogens were identified based on their morphology and molecular identification, while 10 oomycete isolates were identified as Pythium aristosporum—the first to be reported in rice seedling blight. Its optimum growth conditions include a temperature of 25 °C, pH 6, and photoperiod of 24 h. Except for soybean (Glycine max (L.) Merr.), black soybean (Glycine max var.), and cucumber (Cucumis sativus L.), P. aristosporum can potentially infect and cause seedling blight on other hosts, such as wheat (Triticum aestivum L.), maize (Zea mays L.), sorghum (Sorghum bicolor (L.) Moench), alfalfa (Medicago sativa L.), oats (Avena sativa L.), and white clover (Trifolium repens L.). Its isolates were found to be highly sensitive to metalaxyl + propamocarb (EC50 = 0.0138 μg/mL) with 84.1% efficacy at 313 μg/mL. These results can serve as the basis for controlling P. aristosporum.

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“…Estas especies infectan semillas y causan la muerte de plántulas en pre y post-emergencia por marchitamiento en tomate, soja y rúcula silvestre, respectivamente (Salman et al, 2012;Navi et al, 2019;Manganiello y Pane, 2021). También se han detectado infectando repollo chino (Tanina et al, 2014;Li et al, 2020) y raíces de alfalfa (Larkin et al, 1995) Hasta ahora, Pythium sp. ha sido descrito como patógeno de plántulas de la familia Brassicaceae, que causa síntomas definidos como ahogamiento o marchitamiento de plántulas, también conocido como "damping-off", como se mencionó anteriormente.…”

Section: Velocidad De Enfriamiento Y De Descongelaciónunclassified

New host-pathogen associations of horticultural crops in the south-east of Spain

Sáez¹

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XV 4.2.2. Identificación fenotípica de los microorganismos………………………………. 4.2.3. Identificación molecular de los microorganismos………………………………. 4.2.4. Confrontación in vitro de los microorganismos implicados………………… 4.2.5. Desarrollo de poblaciones mixtas de los microorganismos implicados creciendo in vitro……………………………………………………………………………………………. 4.2.6. Inoculación de los microorganismos a piezas de tejidos vegetales sanos………………………………………………………………………………………………………………. 4.3. Resultados……………………………………………………………………………………………….. 4.3.1. Etiología y descripción de la sintomatología………………………………………. 4.3.2. Caracterización fenotípica de los microorganismos……………………………. 4.3.3. Caracterización molecular de los microorganismos……………………………. 4.3.4. Crecimiento in vitro de los microorganismos enfrentados…………………. 4.3.5. Crecimiento combinado de los microorganismos in vitro…………………… 4.3.6. Patogenicidad en escapos de brócoli sanos……………………………………….. 4.4. Discusión…………………………………………………………………………………………………. 4.5. Conclusiones……………………………………………………………………………………………. CAPÍTULO 5 Fusariosis del fruto de melón causada por distintas especies de Fusarium…… 5.1. Introducción…………………………………………………………………………………………….

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Biological characteristics and isolation of Pythium ultimum causing rot of Chinese cabbage

Cited by 7 publications

References 16 publications

Identification of the Causal Agent of Brown Leaf Spot on Kiwifruit and Its Sensitivity to Different Active Ingredients of Biological Fungicides

Identification of the Causal Agent of Brown Leaf Spot on Kiwifruit and Its Sensitivity to Different Active Ingredients of Biological Fungicides

Characterisation of Pythium aristosporum Oomycete—A Novel Pathogen Causing Rice Seedling Blight in China

New host-pathogen associations of horticultural crops in the south-east of Spain

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