scholarly journals Fractionation of Phenolic Compounds Extracted from Propolis and Their Activity in the Yeast Saccharomyces cerevisiae

PLoS ONE ◽  
2013 ◽  
Vol 8 (2) ◽  
pp. e56104 ◽  
Author(s):  
Tanja Petelinc ◽  
Tomaž Polak ◽  
Lea Demšar ◽  
Polona Jamnik
2019 ◽  
Vol 13 ◽  
pp. 03005
Author(s):  
Chiara Pastore ◽  
Gianluca Allegro ◽  
Gabriele Valentini ◽  
Emilia Colucci ◽  
Fabrizio Battista ◽  
...  

The effect of biotic and abiotic elicitors on the secondary metabolism in grapevine is gaining a lot of interest, as it has been shown that they can increase the accumulation of phenolic compounds and anthocyanins in particular. The aim of this research was to verify the biochemical and molecular effects of the application of LalVigne™ MATURE (Lallemand, St. Simon, France), 100% inactivated natural yeast (Saccharomyces cerevisiae) on the anthocyanin accumulation in potted plants of Sangiovese. In both years, LVM plants did not differ from C in technological ripening at harvest. A significant increase in anthocyanin concentration and the expression of genes involved in their biosynthesis was found in 2016 in LVM grapes compared to C, while in 2017, a year with extremely warm temperatures, the anthocyanins of C and LVM were comparable, despite a slight increase in LVM after the second treatment.


2019 ◽  
pp. 317-323
Author(s):  
Vadim Vyalkov ◽  
Mariya Sundyreva

Работа посвящена изучению изменений в фенольном метаболизме винограда с различной устойчивостью к милдью при применении прайминга микроорганизмами. Исследования были проведены на двух гибридных формах винограда селекции ФГБНУ СКФНЦСВВ, отличающихся по устойчивости к милдью. В качестве агента прайминга были выбраны симбионтные дрожжи Saccharomyces cerevisiae (S.C.). Было установлено существенное снижение развития милдью на листовых дисках, обработанных S.C. Более восприимчивая к милдью ТАНА 33 демонстрировала отложенную по времени реакцию, связанную с изменением общего содержания фенольных соединений, чем более устойчивая форма ТАНА 42. Обработка S.C. приводила к синтезу ресвератрола у обеих гибридных форм. При непосредственном заражении у ТАНА 33 содержание микроботоксичного виниферина увеличилось на 24 часа быстрее, чем у ТАНА 42, но изначально более высокое его содержание в листьях ТАНА 33 через 48 и 96 часов после обработки заметно снижалось, что говорит о повышенном расходе и недостаточной скорости восполнения, возможно, высоким уровнем ингибирования синтеза его предшественника ресвератрола со стороны патогена. Гваяколовая пероксидаза принимает участие в преобразовании ресвератрола в виниферин. Показано, что существенного роста её активности у ТАНА 33 не происходило ни в один из периодов измерений. В противоположность этому, активность гваяколовых пероксидаз увеличивалась у ТАНА 42 через 48 часов после заражения на фоне S.C. Аналогичная тенденция прослеживалась по активности полифенолоксидазы. Хаотичные изменения в содержании стильбенов, низкая ферментативная активность у формы ТАНА 33 может свидетельствовать либо о недостаточном сигнальном пути, либо об отклонениях в процессе. Для формы ТАНА 42 характерна согласованная динамика содержания фенольных соединений, стильбенов, активности ферментов, более ранняя реакция на возбудителя на фоне обработки S.C.Changes in phenolic metabolism were studied in two hybrid forms of grapevine using priming with microorganisms. The study forms were released by the North-Caucasian Centre of Horticulture, Viticulture and Winemaking and have different resistance to downy mildew. Symbiont yeast Saccharomyces cerevisiae (S.C.) entered as priming agent. A considerably lower development of the disease was registered on leaf disks treated with S.C. The form ТАНА 33 which is more susceptible to downy mildew showed a time-delayed response associated with changes in levels of total phenolic compounds in comparison to the form ТАНА 42 with a better resistance to downy mildew. Resveratrol synthesis was induced in both study forms by S.C. treatment. Following a direct infection with downy mildew, ТАНА 33 showed a 24 h earlier increase in the level of microbe-toxic viniferin than ТАНА 42. Nevertheless, 48 and 96 h after the treatment, the initially higher level of viniferin in ТАНА 33 leaves went down considerably, which suggests a higher utilization and insufficient replenishment rate of this substance, probably, due to high inhibition of the synthesis of resveratol, its precursor, by the pathogen. Transformation of resveratrol into viniferin is assisted by guaiacol peroxidase. No substantial increase in its activity was registered in ТАНА 33 in any measurement time interval. On the contrary, ТАНА 42 showed an increase in guaiacol peroxidase activity 48 h after infection with downy mildew on the background of S.C. treatment. Polyphenol oxidase activity showed a similar tendency. Chaotic changes in stilbene levels and low fermentation activity in ТАНА 33 may indicate either an insufficient signaling pathway or aberrations of the process. A concurrent dynamics as to the levels of phenolic compounds and stibenes and the enzymatic activities as well as an earlier response to the pathogen against the S.C. treatment are characteristic for ТАНА 42.


2018 ◽  
Vol 96 (7) ◽  
pp. 1444-1450 ◽  
Author(s):  
Bruna Lyra Colombi ◽  
Patrícia Raquel Silva Zanoni ◽  
Lorena Benathar Ballod Tavares

2016 ◽  
Vol 13 (1) ◽  
pp. 93
Author(s):  
Titin Yulinery ◽  
Ratih M.Dewi

Tes kemampuan adalah salah satu kegiatan penting dalam pengendalian mutu dan jaminan kualitas mikrobiologi laboratorium untuk mengukur kompetensi analis dan analisis uji profisiensi membutuhkan persiapan Model mikroorganisme adalah kualitas standar dan validitas. Mikrobiologi uji kualitas produk kedelai utama diarahkan pada kehadiran Saccharomyces cerevisiae ragi (S. cerevisiae), S. Bailli, S. rouxii dankontaminan bakteri seperti Bacillus dan Deinococcus. Jenis ragi dan bakteri yang terlibat dalam proses dan dapat menjadi salah satu parameter kualitas penting dalam persiapan yang dihasilkan. Jumlah dan viabilitas bakteri dan ragi menjadi parameter utama dalam proses persiapan bahan uji. Jumlah tersebut adalah jumlah minimum yang berlaku dapat dianalisis. Jumlah ini harus dibawah 10 CFU diperlukan untuk menunjukkan tingkat hygienitas proses dan tingkat minimal kontaminasi. Viabilitas bakteri dan bahan tes ragi persiapan untuk tes kemahiran kecap yang diawetkan dengan L-pengeringan adalah teknik Deinococcus radiodurans (D. radiodurans) 16 tahun, 58 tahun S. cerevisiae, dan S. roxii 13 tahun. kata kunci: Viabilitas, Deinococcus, khamir, L-pengeringan, Proficiency AbstractProficiency test is one of the important activities in quality control and quality assurance microbiology laboratory for measuring the competence of analysts and analysis Proficiency test requires a model microorganism preparations are standardized quality and validity. Microbiological test of the quality of the main soy products aimed at thepresence of yeast Saccharomyces cerevisiae (S. cerevisiae), S. bailli, S. rouxii and bacterial contaminants such as Bacillus and Deinococcus. Types of yeasts and bacteria involved in the process and can be one of the important quality parameters in the preparation produced. The number and viability of bacteria and yeasts become themain parameters in the process of test preparation materials. The amount in question is the minimum number that is valid can be analyzed. This amount must be below 10 CFU required to indicate the level of hygienitas process and the minimum level of contamination. Viability of bacteria and yeast test preparation materials for proficiencytest of soy sauce that preserved by L-drying technique is Deinococcus radiodurans ( D. radiodurans ) 16 years, 58 years S. cerevisiae, and S. roxii 13 years. key words : Viability, Deinococcus, Khamir, L-drying, Proficiency


Tsitologiya ◽  
2018 ◽  
Vol 60 (7) ◽  
pp. 555-557 ◽  
Author(s):  
E. A. Alekseeva ◽  
◽  
T. A. Evstyukhina ◽  
V. T. Peshekhonov ◽  
V. G. Korolev ◽  
...  

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