Isolation by genetic and physiological characteristics of a fuel-ethanol fermentative Saccharomyces cerevisiae strain with potential for genetic manipulation.
Fuel ethanol fermentation process is a complex environment with an intensive succession of yeast strains. The population stability depends on the use of a well-adapted strain that can fit to a particular industrial plant. This stability helps to keep high level of ethanol yield and it is absolutely required when intending to use recombinant strains. Yeast strains have been previously isolated from different distilleries in Northeast Brazil and clustered in genetic strains by PCR-fingerprinting. In this report we present the isolation and selection of a novel Saccharomyces cerevisiae strain by its high dominance in the yeast population. The new strain, JP1 strain, presented practically the same fermentative capacity and stress tolerance like the most used commercial strains, with advantages of being highly adapted to different industrial units in Northeast Brazil that used sugar cane juice as substrate. Moreover, it presented higher transformation efficiency that pointed out its potential for genetic manipulations. The importance of this strain selection programme for ethanol production is discussed.
da Silva Filho
Eurípedes Alves
EA
Setor de Biologia Molecular/LIKA, Recife, PE, Brazil.
de Melo
Hélio Fernandes
HF
Antunes
Daiane Felberg
DF
dos Santos
Scheila Karina Brito
SK
do Monte Resende
Alecsandra
A
Simões
Diogo Ardaillon
DA
de Morais
Marcos Antonio
MA
D000143:Acids; D000222:Adaptation, Physiological; D016172:DNA Fingerprinting; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D007218:Industrial Microbiology; D012441:Saccharomyces cerevisiae / Q000145:classification / Q000302:isolation & purification / Q000502:physiology*; D031786:Saccharum / Q000378:metabolism; D013045:Species Specificity
D000143:Acids; D000431:Ethanol