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• W4254663646 abstract "Engineering in Life SciencesVolume 14, Issue 6 p. 548-549 EditorialFree Access Editorial: Plant cells and algae in bioreactors First published: 13 November 2014 https://doi.org/10.1002/elsc.201470065Citations: 5AboutSectionsPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Atanas Pavlov Five years after the success of the first published Special issue on “Plant cells and algae in bioreactors” 1 it is our pleasure to present the second one, providing recent achievement and the state-of-the-art in this emerging area of bioprocess engineering. During the past five years there was increasing interest in microalgae and plant cells as production systems for pharmaceuticals, foods and food additives, biofuels and more. Despite a significant progress, low yields and the complex scale-up of bioreactor cultivation remain major limitations for industrial implementation of microalgae and plant cell culture. The articles collected in this Special issue represent results of the most recent achievements and critical research focused to find different ways for solving these limitations in yield and bioprocessing conditions. The main focus in current research represented in this Special issue is now the development of integrated approaches for process optimization and improvement of bioreactor designs. Economically effective and sustainable processes, based on microalgae and plant cell, tissue and organ cultures technology, could only be developed considering integration of optimization procedures, such as strain selection, nutrient media and environmental conditions optimization, bioreactor design and downstream processes. A valuable review on integration in microalgal bioprocess development is presented by Fresenwinkel et al. 2. The authors suggest grouping the steps of microalgae bioprocess development into several degrees of integration with respect to classical upstream, bioreaction and downstream processes 2. This aspect is also addressed by several authors in this issue for particular production processes based on plant in vitro systems: Jeandet et al. 3 describe resveratrol production at large scale using plant cell suspension; Callego et al. 4 present centoellosides production by plant in vitro systems with different degree of differentiation and also scale-up the processes; Berkov et al. 5 summarize 10 years of research on galanthamine production by shoot type plant in vitro cultures, describing different steps of process optimization, development of suitable bioreactor design and peculiarities in cultivation of that complex in vitro system. Production processes based on photosynthetic cells strongly depend on light as a factor influencing both biomass and product yields. A valuable contribution in this area is presented by Wang et al. 6. The authors outline the research progress on the improvement of light utilization in microalgae cultivation. This aspect is also addressed by Gutierrez-Wing et al. 7 who review the impact of light irradiance and wavelength on the growth, productivity and composition of microbial photosynthetic cultures. Kula et al. 8 further provide evidence for the influence of far-red light on biomass production of Chlorella vulgaris. An innovative study of cultivation of cells under illumination is presented by Socher et al. 9. The authors outline the perspectives of a RAMOS cultivation system for investigating the growth of phototrophic organisms under controlled light conditions 9. Biofuels and alternative energy sources are further important issues addressed by the competence of photosynthetic bioprocess engineering. A valuable contribution in that area is presented by Weber et al. 10. The authors describe detailed aspects of phototrophic hydrogen production by bacteria, cyanobacteria and algae, highlighted the resent technological and research achievements in this field 10. Downstream processing, including the extraction of target metabolites from the biomass is the key point in algae-based productions. This aspect of technology is addressed by Michalak and Chojnaska 11, who compare advantages and disadvantages of classical and novel extraction techniques. The authors review the production of algal extracts avoiding utilization of toxic solvents or aggressive extraction conditions 11. Employment of low cost bioreactor systems is one of the options to reduce the cost of secondary metabolites production by plant in vitro systems. Temporary immersion systems offer such an alternative. Georgiev et al. 12 describe variations in the design and the operation among the most recently developed temporary immersion systems and their potential for large-scale propagation of plantlets, shoots, hairy roots, and production of secondary metabolites. Another alternative to the conventionally used stainless steel bioreactors is application of single used or disposable vessels. Werner et al. 13 study the advantages of these cultivation systems and their application for the needs of plant biotechnology. The authors present the results of their research in mass propagation of Helianthus annuus suspension cells in orbitally shaken bioreactors and clearly demonstrate that these cultivation systems are efficient alternative of wave-mixed and stirred systems 13. Key points in development of commercial processes, based on plant in vitro systems, is the effective scale-up. In this Special issue Nohynek et al. 14 present for the first time the results of large scale cultivation of cloudberry (Rubus chamaemorus) cells. The described industrial process results in production of cloudberry biomass with consistent quality and defined chemical composition 14. Studies on product release and in situ extraction of target metabolites is often an underestimated part of integrated approaches for optimization of plant cell based production processes. However, this is an essential step to increase the yields and purity of desired metabolites produced in complex mixtures by the in vitro grown plant cell cultures. To highlight the importance of these technological steps, Su and Wu 15 provide an excellent example for enhanced release of tanshinones and phenolics by nonionic surfactants from hairy roots of Salvia miltiorrhiza. As an editor of the second Special issue “Plant cells and algae in bioreactors”, I would like to thank all authors for their valuable contribution and the reviewers for their helpful criticisms. Together we have created a Special issue in which leading experts share their experience in bioprocess engineering of plant cells and algae and outline the fundamentals of future research in this field. I believe this Special issue will be a step forward for practical implementation of plant cells and algae in vitro technologies. Prof. Atanas Pavlov University of Food Technologies, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Plovdiv, Bulgaria References 1Pavlov, A., Plant cells and algae in bioreactors. Eng. Life Sci. 2009, 9, 154– 155. Wiley Online LibraryCASWeb of Science®Google Scholar 2Fresewinkel, M., Rosello, R., Wilhelm, C., Kruse, O. et al., Integration in microalgal bioprocess development: Design of efficient, sustainable, and economic processes. Eng. Life Sci. 2014, 14, 560– 573. Wiley Online LibraryCASWeb of Science®Google Scholar 3Jeandet, P., Clement, C., Courot, E., Resveratrol production at large scale using plant cell suspensions. Eng. Life Sci. 2014, 14, 622– 632. Wiley Online LibraryCASWeb of Science®Google Scholar 4Gallego, A., Ramirez-Estrada, K., Vidal-Limon, H. R., Hidalgo, D. et al., Biotechnological production of centellosides in cell cultures of Centella asiatica (L) Urban. Eng. Life Sci. 2014, 14, 633– 642. Wiley Online LibraryCASWeb of Science®Google Scholar 5Berkov, S., Ivanov, I., Codina, C., Georgiev, V. et al., Galanthamine biosynthesis in plant in vitro systems. Eng. Life Sci. 2014, 14, 643– 650. Wiley Online LibraryCASWeb of Science®Google Scholar 6Wang, S. K., Stiles, A. R., Guo, C., Liu, C. Z., Microalgae cultivation in photobioreactors: An overview of light characteristics. Eng. Life Sci. 2014, 14, 550– 559. Wiley Online LibraryCASWeb of Science®Google Scholar 7Gutierrez-Wing, M. T., Silaban, A., Barnett, J., Rusch, K. A., Light irradiance and spectral distribution effects on microalgal bioreactors. Eng. Life Sci. 2014, 14, 574– 580. Wiley Online LibraryCASWeb of Science®Google Scholar 8Kula, M., Rys, M., Skoczowski, A., Far-red light (720 or 740 nm) improves growth and changes the chemical composition of Chlorella vulgaris. Eng. Life Sci. 2014, 14, 651– 657. Wiley Online LibraryCASWeb of Science®Google Scholar 9Socher, M. L., Lenk, F., Geipel, K., Carolin, S. et al., Phototrophic growth of Arthrospira platensis in a respiration activity monitoring system for shake flasks (RAMOS). Eng. Life Sci. 2014, 14, 658– 666. Wiley Online LibraryWeb of Science®Google Scholar 10Weber, J., Krujatz, F., Hilpmann, G., Grützner, S. et. al., Biotechnological hydrogen production by photosynthesis. Eng. Life Sci. 2014, 14, 592– 606. Wiley Online LibraryCASWeb of Science®Google Scholar 11Michalak, I., Chojnacka, K., Algal extracts: Technology and advances. Eng. Life Sci. 2014, 14, 581– 591. Wiley Online LibraryCASWeb of Science®Google Scholar 12Georgiev, V., Schumann, A., Pavlov, A., Bley, T., Temporary immersion systems in plant Biotechnology. Eng. Life Sci. 2014, 14, 607– 621. Wiley Online LibraryCASWeb of Science®Google Scholar 13Werner, S., Greulich, J., Geipel, K., Steingroewer, J. et al., Mass propagation of Helianthus annuus suspension cells in orbitally shaken bioreactors: Improved growth rate in single-use bag bioreactors. Eng. Life Sci. 2014, 14, 676– 684. Wiley Online LibraryCASWeb of Science®Google Scholar 14Nohynek, L., Bailey, M., Tähtiharju, J., Seppänen-Laakso, T. et al., Cloudberry (Rubus chamaemorus) cell culture with bioactive substances: Establishment and mass propagation for industrial use. Eng. Life Sci. 2014, 14, 667– 675. Wiley Online LibraryCASWeb of Science®Google Scholar 15Siu, K. C., Wu, J. Y., Enhanced release of tanshinones and phenolics by nonionic surfactants from Salvia miltiorrhiza hairy roots. Eng. Life Sci. 2014, 14, 685– 690. Wiley Online LibraryCASWeb of Science®Google Scholar Citing Literature Volume14, Issue6Special Issue: Plant cells and algae in bioreactorsNovember 2014Pages 548-549 ReferencesRelatedInformation" @default.
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