Effect of temperature on the growth of Geotrichum candidum and chemical control of sour rot on tomatoes

Thomidis, T.; Prodromou, Ioanna; Farmakis, Argyris; Zambounis, Antonios

doi:10.1007/s40858-021-00453-1

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…As such, there are no data available regarding G. candidum in context to the saffron plant. However, previous studies have already revealed G. candidum as a strongly virulent pathogen to carrots ( Horita and Hatta, 2016 ), citrus plants ( Wang et al., 2021 ), strawberry ( Ma et al., 2018 ), and tomatoes ( Thomidis et al., 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Injury and not the pathogen is the primary cause of corm rot in Crocus sativus (saffron)

et al. 2023

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Fusarium oxysporum has been reported to be the most devastating pathogen of Crocus sativus L., a commercially significant crop that yields the saffron spice. However, most of the pathogen isolations have been done from the diseased tissue, mostly from rotten corms, but no study has been conducted on diseased saffron fields. To fill the knowledge gap, the current study was carried out with the intention of recording the diversity of cultivable fungus species from saffron fields and screening them for pathogenicity towards saffron. The three study locations in Jammu and Kashmir, Srinagar (Pampore), Kishtwar, and Ramban, yielded a total of 45 fungal isolates. The internal transcribed spacer (ITS) of rDNA was used for the molecular identification. ITS rDNA-based sequence analysis classified all the operational taxonomic units (OTUs) into two phyla—Ascomycota (88.88%) and Mucoromycota (11.11%). Moreover, Fusarium (57.77%), Geotrichum (17.77%), Mucor (11.11%), Aspergillus (4.44%), Trichoderma (4.44%), Galactomyces (2.22%), and Colletotrichum (2.22%) all had different total abundances at the genus level. It was discovered that the saffron fields in Srinagar have fewer varied fungal species than the other two selected sites. All of the fungal isolates isolated including Fusarium solani, Aspergillus flavus, Trichoderma harzianum, Fusarium neocosmosporiellum, and Mucor circinelloides were pathogenic according to the pathogenicity test; however, injury to the saffron plant was found to be a must. These fungi were pathogenic in addition to F. oxysporum, which is well documented as a major cause of saffron corm rot diseases in Srinagar, but in the present study, injury was a must for F. oxysporum as well. The percentage disease severity index for both saffron roots and corms varied for each fungal isolate.

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Section: Discussionmentioning

confidence: 99%

Injury and not the pathogen is the primary cause of corm rot in Crocus sativus (saffron)

et al. 2023

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“…Some strains of G. candidum are considered a critical factor in the spoilage of fruits and vegetables, such as cucumber, carrot, tomato, and stone fruit [ 213 , 214 , 215 ]. Additionally, G. candidum Link ex Pers.…”

Section: Association With Diseasesmentioning

confidence: 99%

Uncovering the Biotechnological Importance of Geotrichum candidum

Kamilari

Stanton

Reen

et al. 2023

Foods

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Fungi make a fundamental contribution to several biotechnological processes, including brewing, winemaking, and the production of enzymes, organic acids, alcohols, antibiotics, and pharmaceuticals. The present review explores the biotechnological importance of the filamentous yeast-like fungus Geotrichum candidum, a ubiquitous species known for its use as a starter in the dairy industry. To uncover G. candidum’s biotechnological role, we performed a search for related work through the scientific indexing internet services, Web of Science and Google Scholar. The following query was used: Geotrichum candidum, producing about 6500 scientific papers from 2017 to 2022. From these, approximately 150 that were associated with industrial applications of G. candidum were selected. Our analysis revealed that apart from its role as a starter in the dairy and brewing industries, this species has been administered as a probiotic nutritional supplement in fish, indicating improvements in developmental and immunological parameters. Strains of this species produce a plethora of biotechnologically important enzymes, including cellulases, β-glucanases, xylanases, lipases, proteases, and α-amylases. Moreover, strains that produce antimicrobial compounds and that are capable of bioremediation were identified. The findings of the present review demonstrate the importance of G. candidum for agrifood- and bio-industries and provide further insights into its potential future biotechnological roles.

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“…Microscopic appearance of G. candidum shows septate branching hyphae, which disarticulate almost entirely into rectangular arthroconidia (5-6 × 5-17 µm). The predominant branching pattern exhibited by fungal hyphae is di-or trichotomous branching of the peripheral hyphae [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Modelling the Effect of Temperature on the Initial Decline during the Lag Phase of Geotrichum candidum

et al. 2021

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The study of lag phase provides essential knowledge for food quality control. With respect to significance of Geotrichum candidum in the food context, the aim of this study was to quantitatively characterize the relationship between temperature (6–25 °C) and initial decline period during G. candidum lag phase. The decrease in G. candidum cells in the lag phase was primary modelled by Weibull’s model to define the first-decimal reduction time (δ). Subsequently, the lag death rate (LDR) values were recalculated from δ and further modelled by using Arrhenius equations, as well as a square root model, and the models’ suitability was proven by selected statistical indices. The square root model with the estimated parameters b = 0.016 °C−1 h−0.5 and Tmin = −0.72 °C showed better indices relating to goodness of fit based on a low root mean sum of square error (RMSE = 0.028 log CFU mL−1), a higher coefficient of determination (R2 = 0.978), and the lowest value of AIC (AIC = −38.65). The present study provides a solution to the possible application of secondary predictive models to the death rate dependence on temperature during the microbial lag phase. Despite limited practical importance, under specific conditions, it is possible to consider its use, for example, in exposure assessment.

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Effect of temperature on the growth of Geotrichum candidum and chemical control of sour rot on tomatoes

Cited by 5 publications

References 15 publications

Injury and not the pathogen is the primary cause of corm rot in Crocus sativus (saffron)

Injury and not the pathogen is the primary cause of corm rot in Crocus sativus (saffron)

Uncovering the Biotechnological Importance of Geotrichum candidum

Modelling the Effect of Temperature on the Initial Decline during the Lag Phase of Geotrichum candidum

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