γ-decalactone production by Yarrowia lipolytica and Lindnera saturnus in crude glycerol

Géssyca P A Soares, K. T. Souza, L. Vilela, R. Schwan, D. R. Dias
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引用次数: 24

Abstract

ABSTRACT Flavor compounds are commonly obtained from chemical synthesis or extracted from plants. These sources have disadvantages, such as racemic mixture generation, more steps to yield the final product, low yield, and high cost, making the microbial fermentation an alternative and potential way to obtain flavor compounds. The most important lactone for flavor application is γ-decalactone, which has an aroma of peach and can be obtained by ricinoleic acid biotransformation through yeast peroxisomal β-oxidation. The aim of this work was to use crude glycerol, a residual biodiesel industry, for the production of bioaroma from two different yeasts. Yarrowia lipolytica CCMA 0357 and Lindnera saturnus CCMA 0243 were grown at different concentrations (10, 20, and 30% w/v) of substrates (castor oil and crude glycerol) for γ-decalactone production. L. saturnus CCMA 0243 produced higher concentration of y-decalactone (5.8 g/L) in crude glycerol, whereas Y. lipolytica CCMA 0357 showed a maximum production in castor oil (3.5 g/L). Crude glycerol showed better results for γ-decalactone production when compared to castor oil. L. saturnus CCMA 0243 has been shown to have a high potential for γ-decalactone production from crude glycerol.
脂解耶氏菌和土星林德纳菌在粗甘油中生产γ-癸内酯
风味化合物通常通过化学合成或从植物中提取而得。这些来源具有外消旋混合物生成步骤多、产率低、成本高等缺点,使得微生物发酵成为一种有潜力的获得风味化合物的替代方法。在香精应用中最重要的内酯是γ-癸内酯,具有桃的香气,可通过酵母过氧化物酶体β-氧化对蓖麻油酸进行生物转化。本研究的目的是利用生物柴油工业中残留的粗甘油,从两种不同的酵母中生产生物香气。在不同浓度的底物(蓖麻油和粗甘油)下(10、20和30% w/v)培养脂雅氏雅氏菌CCMA 0357和饱和林纳氏雅氏菌CCMA 0243,以生产γ-十内酯。L. saturnus CCMA 0243在粗甘油中产生的y-癸内酯浓度较高(5.8 g/L),而Y. lipolytica CCMA 0357在蓖麻油中产生的y-癸内酯浓度最高(3.5 g/L)。与蓖麻油相比,粗甘油生产γ-癸内酯的效果更好。L. saturnus CCMA 0243具有从粗甘油生产γ-癸内酯的高潜力。
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