scispace - formally typeset
Search or ask a question
Author

Desiree Jakobs-Schönwandt

Bio: Desiree Jakobs-Schönwandt is an academic researcher from Bielefeld University of Applied Sciences. The author has contributed to research in topics: Mycelium & Yeast extract. The author has an hindex of 3, co-authored 5 publications receiving 70 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: Investigating whether and how blastospore formation can be shifted to resilient submerged conidiospores (SCS) by introducing osmotic stress in different growth phases and protection of plants colonized by B. bassiana against herbivorous insects.

42 citations

Journal ArticleDOI
TL;DR: This is the first report of fermentation of an endophytic B. bassiana strain in a low-cost culture medium to very high yields of TS and spores from submerged cultivation were able to colonize oilseed rape leaves via leaf application.
Abstract: A novel approach for biological control of insect pests could be the use of the endophytic entomopathogenic Beauveria bassiana isolate ATP-02. For the utilization of the endophyte as a commercial biocontrol agent, the fungus has to be mass-produced. B. bassiana was raised in shake flask cultures to produce high concentrations of total spores (TS), which include blastospores (BS) and submerged conidiospores (SCS). The highest concentration of 1.33×109 TS/mL and the highest yield of 5.32×1010 TS/g sucrose was obtained in the TKI broth with 5% sugar beet molasses which consists of 50% sucrose as a carbon source. In spite of the lower sugar concentration (2.5%) the amount of TS could be increased up to 11-times in contrast to the cultivation with 5% sucrose. The scale-up to a 2 L stirred tank reactor was carried out at 25°C, 200–600 rpm and 1 vvm at pH 5.5. A TS yield of 5.2×1010 TS/g sucrose corresponding to a SCS yield of 0.2×1010 SCS/g sucrose was obtained after 216 h. With regards to the culture medium the cost of 1012 TS amounts to 0.24 €. Plutella xylostella larvae, which were fed with oilseed rape leaves treated with spores from fermentation resulted in 77 ± 5% mortality. Moreover, spores from submerged cultivation were able to colonize oilseed rape leaves via leaf application. This is the first report of fermentation of an endophytic B. bassiana strain in a low-cost culture medium to very high yields of TS.

28 citations

Journal ArticleDOI
TL;DR: Fermentation and formulation aspects of the nematophagous fungus Hirsutella rhossiliensis BBA were investigated and radial growth of mycelium out of dried hollow beads containing 1% biomass and 3% baker's yeast was faster than for alginate beads containing equivalent amounts of biomass and yeast indicating a higher bio-control potential.
Abstract: In this work, fermentation and formulation aspects of the nematophagous fungus Hirsutella rhossiliensis BBA were investigated. When incubated in 2% (w/w) glucose and 0.5% (w/w) yeast extract medium in a 1-L Erlenmeyer flask without baffles, heavy pellet formation was observed. Only 40% of the mycelium had a size less than 500 μm. When a flask with three baffles was used, the portion of mycelium <500 μm rose to 95%. In the next step, the influence of aeration rate and stirrer speed on production of finely dispersed mycelium in a stirred tank reactor was investigated. The best fermentation results were obtained at 0.4 vvm and 400 rpm stirrer speed with 90% mycelium <500 μm and 5 g/L biomass. Then, mycelium was microencapsulated in hollow beads based on sulfoethylcellulose (SEC). Experiments on the capsule nutrient reservoir showed that 15% (w/w) corn gluten and 0.5% (w/w) yeast extract could be replaced with 3% (w/w) autoclaved baker's yeast which was never used as capsule additive before. Radial growth of mycelium out of dried hollow beads containing 1% (w/w) biomass and 3% (w/w) baker's yeast was faster than for alginate beads containing equivalent amounts of biomass and yeast indicating a higher bio-control potential.

11 citations

Journal ArticleDOI
TL;DR: Cellulose-based microcapsules supplemented with autoclaved baker’s yeast proved to be an effective delivery system for H. rhossiliensis to control H. schachtii.

6 citations

Journal ArticleDOI
TL;DR: A.V. Patel, A.J. Jakobs-Schönwandt, D.V., C.Beermann, C.J., D. Jakob, and A.V as discussed by the authors presented the Lebensmittel(bio)technologie (ATW-L) Formulierung eines Zuckers zur Entwicklung einer nachhaltigen Herbizids.
Abstract: LebensmittelchemieVolume 76, Issue S2 p. S2-259-S2-259 Lebensmittel(bio)technologie (ATW-L) Formulierung eines Zuckers zur Entwicklung eines nachhaltigen Herbizids C. Beermann, C. Beermann Bielefeld/D Bielefelder Institut für Angewandte Materialwissenschaften, Fachhochschule Bielefeld, Interaktion 1, 33619 Bielefeld/DSearch for more papers by this authorD. Jakobs-Schönwandt, D. Jakobs-Schönwandt Bielefeld/DSearch for more papers by this authorA.V. Patel, A.V. Patel Bielefeld/DSearch for more papers by this author C. Beermann, C. Beermann Bielefeld/D Bielefelder Institut für Angewandte Materialwissenschaften, Fachhochschule Bielefeld, Interaktion 1, 33619 Bielefeld/DSearch for more papers by this authorD. Jakobs-Schönwandt, D. Jakobs-Schönwandt Bielefeld/DSearch for more papers by this authorA.V. Patel, A.V. Patel Bielefeld/DSearch for more papers by this author First published: 01 September 2022 https://doi.org/10.1002/lemi.202259209AboutPDF 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 onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume76, IssueS2September 2022Pages S2-259-S2-259 RelatedInformation

Cited by
More filters
Journal ArticleDOI
TL;DR: This manuscript reviews fifty ways in which fungi can potentially be utilized as biotechnology and provides a flow chart that can be used to convince funding bodies of the importance of fungi for biotechnological research and as potential products.
Abstract: Fungi are an understudied, biotechnologically valuable group of organisms. Due to the immense range of habitats that fungi inhabit, and the consequent need to compete against a diverse array of other fungi, bacteria, and animals, fungi have developed numerous survival mechanisms. The unique attributes of fungi thus herald great promise for their application in biotechnology and industry. Moreover, fungi can be grown with relative ease, making production at scale viable. The search for fungal biodiversity, and the construction of a living fungi collection, both have incredible economic potential in locating organisms with novel industrial uses that will lead to novel products. This manuscript reviews fifty ways in which fungi can potentially be utilized as biotechnology. We provide notes and examples for each potential exploitation and give examples from our own work and the work of other notable researchers. We also provide a flow chart that can be used to convince funding bodies of the importance of fungi for biotechnological research and as potential products. Fungi have provided the world with penicillin, lovastatin, and other globally significant medicines, and they remain an untapped resource with enormous industrial potential.

404 citations

Journal ArticleDOI
TL;DR: This versatile technology has found application in various biotechnological processes such as probiotic encapsulation in food industries, in biotransformation and fermentation processes producing antibiotics, organic acids, enzymes, and alcohols as well as environmental decontamination such as waste water treatment.

236 citations

Journal ArticleDOI
TL;DR: This review presents several areas that should receive focused attention to increase the probability of success for making this technology an effective alternative to chemical control.
Abstract: Fungal entomopathogens have been proposed as environmentally friendly alternatives to chemical control. Unfortunately, their effectiveness continues to be limited by their susceptibility to ultravi...

211 citations

Journal ArticleDOI
TL;DR: An overview of mass-production and formulation strategies, updated list of registered commercial products, major biocontrol programs and ecological aspects affecting the use of Beauveria as a mycoinsecticide are provided.
Abstract: Among invertebrate fungal pathogens, Beauveria bassiana has assumed a key role in management of numerous arthropod agricultural, veterinary and forestry pests. Beauveria is typically deployed in one or more inundative applications of large numbers of aerial conidia in dry or liquid formulations, in a chemical paradigm. Mass production is mainly practiced by solid-state fermentation to yield hydrophobic aerial conidia, which remain the principal active ingredient of mycoinsecticides. More robust and cost-effective fermentation and formulation downstream platforms are imperative for its overall commercialization by industry. Hence, where economics allow, submerged liquid fermentation provides alternative method to produce effective and stable propagules that can be easily formulated as dry stable preparations. Formulation also continues to be a bottleneck in the development of stable and effective commercial Beauveria-mycoinsecticides in many countries, although good commercial formulations do exist. Future research on improving fermentation and formulation technologies coupled with the selection of multi-stress tolerant and virulent strains is needed to catalyze the widespread acceptance and usefulness of this fungus as a cost-effective mycoinsecticide. The role of Beauveria as one tool among many in integrated pest management, rather than a stand-alone management approach, needs to be better developed across the range of crop systems. Here, we provide an overview of mass-production and formulation strategies, updated list of registered commercial products, major biocontrol programs and ecological aspects affecting the use of Beauveria as a mycoinsecticide.

207 citations

Journal ArticleDOI
TL;DR: This review presents a detailed illustrated overview on current encapsulation methods that are applied or that may be tailored to living biological control agents, especially microbial organisms and entomopathogenic nematodes.

171 citations