Contributo alla ecologia dei lieviti <i>Schizosaccharomyces</i> sulle
DOI:
https://doi.org/10.5073/vitis.1977.16.38-44Abstract
Vengono riferiti i risultati di una indagine preliminare sulla distribuzione dei lieviti del genere Schizosaccharomyces sulle uve della Sicilia occidentale, condotta con un nuovo metodo di arricchimento selettivo per Schizosaccharomyces pombe.
Gli schizolieviti sono stati riscontrati presenti in 26 dei 68 campioni di uve esaminate, appartenenti principalmente alle cultivar Zibibbo, Catarratto, Inzolia, Grillo e Grecanico. Sulle uve Zibibbo di Pantelleria tali lieviti costituiscono il gruppo dominante nell'ambito della microflora blastomicetica.
Fra i 62 ceppi di schizolieviti isolati, in massima parte riferibili a Schizosaccharomyces pombe, alcuni presentano interessanti proprietà fisiologiche e biochimiche ai fini enologici.
I risultati ottenuti indicano che, nella zona presa in considerazione, gli schizolieviti rappresentano una componente normale della microflora epifitica delle uve e fanno ritenere che la sporadica segnalazione di tale gruppo blastomicetico nelle ricerche di zimologia delle uve sia da attribuire ai metodi di indagine inadeguati.
A contribution to the ecology of fission yeasts on grapes
The results of a preliminary investigation on the distribution of fission yeasts on grapes in western Siaily, carried out with a new selective enrichment method for Schizosaccharomyces pombe; are reported.
Fission yeasts have been found on 26 out of the 68 samples examined, belonging chiefly to the Zibibbo, Catarratto, Inzolia, Grillo and Grecanico cultivars. It has been shown that on Zibibbo grapes these yeasts are the main group among the epiphytic blastoflora.
Most of the 42 strains isolated from Sicilian grapes have been classified as Schizosaccharomyces pombe. Some of them show remarkable physiological and biochemical properties from the oenological point of view.
The results reported here show that, in the region considered in this work, fission yeasts must be included among the normal components of the microflora of grapes. On the other hand, it is reasonable to assume that the failure in the detection of Schizosaccharomyces on grapes by previous investigators should be ascribed to an inadeguate experimental procedure.
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