Strain-dependent variance in short-term adaptation effects of two xylose-fermenting strains of Saccharomyces cerevisiae
Artikel i vetenskaplig tidskrift, 2019

The limited tolerance of Saccharomyces cerevisiae to the inhibitors present in lignocellulosic hydrolysates is a major challenge in second-generation bioethanol production. Short-term adaptation of the yeast to lignocellulosic hydrolysates during cell propagation has been shown to improve its tolerance, and thus its performance in lignocellulose fermentation. The aim of this study was to investigate the short-term adaptation effects in yeast strains with different genetic backgrounds. Fed-batch propagation cultures were supplemented with 40% wheat straw hydrolysate during the feed phase to adapt two different pentose-fermenting strains, CR01 and KE6-12. The harvested cells were used to inoculate fermentation media containing 80% or 90% wheat straw hydrolysate. The specific ethanol productivity during fermentation was up to 3.6 times higher for CR01 and 1.6 times higher for KE6-12 following adaptation. The influence of physiological parameters such as viability, storage carbohydrate content, and metabolite yields following short-term adaptation demonstrated that short-term adaptation was strain dependent.

Industrial Saccharomyces cerevisiae strains

Ethanol

Short-term adaptation

Inhibition

Wheat straw hydrolysate

Författare

Marlous van Dijk

Chalmers, Biologi och bioteknik, Industriell bioteknik

Borbála Erdei

Lunds universitet

Mats Galbe

Lunds universitet

Yvonne Nygård

Chalmers, Biologi och bioteknik, Industriell bioteknik

Lisbeth Olsson

Chalmers, Biologi och bioteknik, Industriell bioteknik

Bioresource technology

18732976 (eISSN)

Vol. 292 121922-

Ämneskategorier

Mikrobiologi

Biokatalys och enzymteknik

Annan industriell bioteknik

DOI

10.1016/j.biortech.2019.121922

PubMed

31398543

Mer information

Senast uppdaterat

2019-11-10