Optimization of Enzyme Production of Trichoderma atroviride Using Response Surface Methodology †
by
and
Naomi Tritean
1,2,‡, 
Ioana-Alexandra Bala
1,3,‡,
Diana Constantinescu-Aruxandei
1,* and
Florin Oancea
1,* 
1
National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independentei, Sector 6, 060021 Bucharest, Romania
2
Faculty of Biology, University of Bucharest, 91-95 Spl. Independentei, 050095 Bucharest, Romania
3
Faculty of BiotechnologiesUniversity of Agronomic Sciences and Veterinary Medicine of Bucharest, 59 Marasti Blvd., Sector 1, 011464 Bucharest, Romania
*
Authors to whom correspondence should be addressed.
†
Presented at the 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM, Bucharest, Romania, 27–29 October 2021.
‡
These authors contributed equally to this work.
Chem. Proc. 2022, 7(1), 54; https://doi.org/10.3390/chemproc2022007054
Published: 23 March 2022
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
Trichoderma atroviride is a well-known filamentous fungus used as biocontrol due to its capacity to produce various enzymes that degrade the cell wall of phytopathogenic fungi [1]. It is also an important microorganism for the industrial production of enzymes and metabolites. Light, especially blue light, is known to regulate the expression of many enzymes [2]. By means of response surface methodology (RSM), we aimed to optimize the production of enzymes of T. atroviride, using blue light and side streams from a flourishing industry. A three factors, two levels RSM was used for the enzyme production of T. atroviride, which provided a total of 25 experiments, generating relevant combinations among the 3 variable factors. T. atroviride was incubated for 10 days at 28 °C in minimal medium (MM) supplemented with 20% whey and 1% yeast extract. After 5 days, the samples were exposed to blue light, with variations in the light intensity and exposure time. To analyse the effect of irradiation on enzyme production over time, the irradiated samples were incubated for various durations, according to the factorial model. The protease activity was assayed using casein and Folin–Ciocalteu reagent against a tyrosine (Tyr/Y) standard curve [3]. The cellulase activity was assayed using carboxymethylcellulose (CMC) and DNS (3,5-dinitrosalicylic acid) reagent against a glucose standard curve [4]. Blue light was found to influence the protease and cellulase activity. The ANOVA analysis provided information about the influence of variables on the enzyme production of T. atroviride, along with their synergic effect. Both numerical and graphical results from data processing highlighted a relevant ratio between the variable factors which increased the enzyme production yield. By means of response surface methodology, we developed a biotechnological method for using byproducts resulting from the dairy industry, using blue light to induce enzyme production in Trichoderma cultures.
Author Contributions
Conceptualization, F.O. and D.C.-A.; methodology, N.T. and I.-A.B.; investigation, N.T., I-A.B. and D.C.-A.; project administration, D.C.-A.; supervision, F.O. and D.C.-A.; validation N.T. and I.-A.B.; visualization, N.T. and I.-A.B.; writing—original draft preparation, N.T. and I.-A.B.; writing—review and editing, D.C.-A. and F.O.; funding acquisition, D.-C.A. All authors have read and agreed to the published version of the manuscript.
Funding
This research was funded by a grant of the Ministry of Research, Innovation and Digitization, CNCS/CCCDI—UEFISCDI, project number 107PCE/2021, within PNCDI III and Nucleus Program, project number P.N.19.23.01.01 Smart-Bi, funded by Ministry of Research, Innovation and Digitalization.
Institutional Review Board Statement
Not applicable.
Informed Consent Statement
Not applicable.
Data Availability Statement
Not applicable.
Acknowledgments
We thank Bogdan Trică for helpful discussions in designing the optimization plan.
Conflicts of Interest
The authors declare no conflict of interest.
References
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MDPI and ACS Style
Tritean, N.; Bala, I.-A.; Constantinescu-Aruxandei, D.; Oancea, F. Optimization of Enzyme Production of Trichoderma atroviride Using Response Surface Methodology. Chem. Proc. 2022, 7, 54. https://doi.org/10.3390/chemproc2022007054
AMA Style
Tritean N, Bala I-A, Constantinescu-Aruxandei D, Oancea F. Optimization of Enzyme Production of Trichoderma atroviride Using Response Surface Methodology. Chemistry Proceedings. 2022; 7(1):54. https://doi.org/10.3390/chemproc2022007054
Chicago/Turabian StyleTritean, Naomi, Ioana-Alexandra Bala, Diana Constantinescu-Aruxandei, and Florin Oancea. 2022. "Optimization of Enzyme Production of Trichoderma atroviride Using Response Surface Methodology" Chemistry Proceedings 7, no. 1: 54. https://doi.org/10.3390/chemproc2022007054
