Contribution to the Discussion on the Species Concept in the Pleurotus ostreatus Complex

Molecular genetic analysis of two taxa of the Pleurotus eryngii complex: P. eryngii (DC.Fr.) Quèl. var. eryngii and P. eryngii (DC.Fr.) Quèl. var. ferulae

“…, 1980; Vilgalys, 1991; Vilgalys & Lin Sun, 1994; Zervakis & Balis, 1996). Thus the taxonomic status of entities such as Pleurotus ostreatus , P. colombinus (Eger et al , 1979; Hilber, 1982; Zervakis et al , 1994); P. pulmonarius , P. sapidus (Zervakis et al , 1994; Iraçabal et al , 1995); P. cystidiosus (Zervakis et al. , 1994) has been well defined.…”

Molecular systematics of the genus Pleurotus: analysis of restriction polymorphisms in ribosomal DNA

“…Based on the closer relationships of the P. sapidus isolate with P. pulmonarius isolates, these isolates probably belong to the North American intersterility group II as defined by Vilgalys et al (1993). Moreover, previous works based on morphological and compatibility criteria (Eger et al, 1979) or isozyme data (May & Royse, 1988) suggested that P. sapidus was conspecific with P. ostreatus. The confusing positioning of the P. sapidus isolate could be attributed to the high heterogeneity of the P. sapidus group as pointed out by Hilber (1982).…”

“…However, the RFLP data confirmed recent biochemical studies (Zervakis & Labrère, 1992; Zervakis et al, 1994) and demonstrated that, although possessing relationships, the P. ostreatus isolates studied were clearly separated from P. columbinus ; these data suggested that P. ostreatus and P. columbinus are discrete taxa and have independent evolution processes. Furthermore, others (Hilber, 1982; Zervakis & Labrère, 1992; Petersen & Hughes, 1993; Vilgalys et al, 1993; Zervakis et al, 1994) have demonstrated that P. ostreatus, P. columbinus and P. cornucopiae are not related to P. pulmonarius, which was clearly separated from these species in spite of the conclusions drawn previously by Eger et al (1979).…”

“…Quél., order Agaricales (Singer, 1986), is of increasing economic interest (Chang & Miles, 1991) owing to its ability to readily form fruitbodies of good organoleptic quality on inexpensive agricultural and industrial by-products. In the past most Pleurotus species were dealt with in systematic studies based on morphological and physiological criteria and the outcome of mating tests (Anderson et al , 1973; Eger et al, 1979; Hilber, 1982; Bresinsky et al, 1987); however the authors failed to arrive at a common conclusion. More recently, mating compatibility studies in strains of the Pleurotus ostreatus complex from North American collections permitted a clear determination of the North American species of oyster mushrooms (Vilgalys et al, 1993).…”

Γενετικη Και Ταξινομικη Αναλυση Μυκητων Του Γενους Pleurotus

“…Πάντως ορισμοί του είδους σαν αυτόν του King (1974): "είδος είναι το άθροισμα δύο ή περισσοτέρων πληθυσμών, τα άτομα των οποίων μπορούν να διασταυρώνονται μεταξύ τους, αλλά στη φύση αδυνατούν να ανταλλάξουν γόνους με μέλη άλλων πληθυσμών-ειδών", θεωρούνται ως οι πιο αξιόπιστοι. Στην περίπτωση των ανωτέρων μυκήτων ο παραπάνω ορισμός συμπληρώθηκε και διασκευάστηκε ως εξής (Esser 1977) (Doudrick & Anderson 1989), καθώς και το Pleurotus (Eger et al 1979, Hilber 1982.…”