An indirect assay for volatile compound production in yeast strains.

An indirect assay for volatile compound production in yeast strains.

Scientific reports (2014-01-16)

Davide Ravasio, Andrea Walther, Kajetan Trost, Urska Vrhovsek, Jürgen Wendland

ABSTRACT

Traditional flavor analysis relies on gas chromatography coupled to mass spectrometry (GC-MS) methods. Here we describe an indirect method coupling volatile compound formation to an ARO9-promoter-LacZ reporter gene. The resulting β-galactosidase activity correlated well with headspace solid phase micro extraction (HS/SPME) GC-MS data, particularly with respect to the formation of rose flavor. This tool enables large-scale screening of yeast strains and their progeny to identify the most flavor active strains.

MATERIALS

Product Number

Brand

Product Description

57928-U

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), metal alloy fiber, d_f 100 μm(PDMS, needle size 23 ga, for use with autosampler

57439-U

Supelco

SPME-OC Fiber Assembly, Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), d_f 75 μm(Coating thickness includes 65 μm coating + 10 μm OC (overcoating), needle size 23 ga, pkg of 3 ea, fiber L 1 cm

57294-U

Supelco

SPME fiber assembly polyacrylate (PA), d_f 85 μm(PA, for use with autosampler, needle size 23 ga

57298-U

Supelco

SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with autosampler

57299-U

Supelco

SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with manual holder or autosampler, fiber L 2 cm

57295-U

Supelco

SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), d_f 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler

57333-U

Supelco

SPME Sampling Stand, for use with 4 mL vials

57301

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 100 μm(PDMS, for use with autosampler, needle size 24 ga

57318

Supelco

SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), d_f 75 μm(CAR/PDMS, for use with manual holder, needle size 24 ga

57359-U

Supelco

SPME Portable Field Sampler, coating PDMS/DVB

57302

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 7 μm(PDMS, needle size 24 ga, for use with manual holder

57334-U

Supelco

SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), d_f 85 μm(CAR/PDMS, needle size 24 ga, for use with manual holder, StableFlex fiber

57328-U

Supelco

SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, for use with manual holder

57329-U

Supelco

SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex, for use with autosampler

57344-U

Supelco

SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), d_f 75 μm(CAR/PDMS, needle size 23 ga, for use with manual holder

57308

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 30 μm(PDMS, needle size 24 ga, for use with manual holder

57304

Supelco

SPME fiber assembly polyacrylate (PA), d_f 85 μm(PA, for use with manual holder, needle size 24 ga

57305

Supelco

SPME fiber assembly polyacrylate (PA), d_f 85 μm(PA, for use with autosampler, needle size 24 ga

57303

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 7 μm(PDMS, needle size 24 ga, for use with autosampler

504831

Supelco

SPME Portable Field Sampler, coating CAR/PDMS

57357-U

Supelco

SPME Sampling Stand, for use with 15 mL vials

57335-U

Supelco

SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), d_f 85 μm(CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler

57342-U

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 100 μm(PDMS, for use with manual holder, needle size 23 ga

504823

Supelco

SPME Portable Field Sampler, coating PDMS

57300-U

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 100 μm(PDMS, needle size 24 ga, for use with manual holder

57348-U

Supelco

SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex

57319

Supelco

SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), d_f 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler

57341-U

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 100 μm(PDMS, for use with autosampler, needle size 23 ga

57343-U

Supelco

SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), d_f 75 μm(CAR/PDMS, needle size 23 ga, for use with autosampler

57309

Supelco

SPME fiber assembly Polydimethylsiloxane (PDMS), d_f 30 μm(PDMS, needle size 24 ga, for use with autosampler