| effects of temperature and ph on growth and composition of pythium irregulare and pythium vexans. | | 1971 | 5548903 |
| the relationships between the toxicity and the primary and secondary structures of elicitinlike protein elicitors secreted by the phytopathogenic fungus pythium vexans. | elicitins are toxic and signaling proteins secreted by phytophthora spp. responsible for the incompatible reaction and systemic hypersensitive-like necroses of diverse plant species leading to resistance against fungal or bacterial plant pathogens. such proteins were observed in the culture filtrate of another species of the oomycete genus, pythium vexans. two alpha elicitinlike proteins were purified and sequenced. one of these novel elicitins (vex2) exhibited a 100-residue sequence instead of ... | 1995 | 7756695 |
| a novel class of elicitin-like genes from phytophthora infestans. | elicitins are a family of structurally related proteins that induce hypersensitive response in specific plant species. two phytophthora infestans cdnas, inf2a and inf2b, potentially encoding novel elicitin-like proteins, were isolated from a cdna library made from infected potato tissue. multiple sequence alignments and phylogenetic analyses of 19 elicitins and elicitin-like proteins from nine phytophthora spp. and from pythium vexans suggest that there are at least five distinct classes within ... | 1997 | 9353948 |
| identification of an elicitin gene cluster in phytophthora cinnamomi. | elicitins are a group of highly conserved proteins secreted by species of phytophthora and a species of the related genus pythium, pythium vexans. some of these proteins act as inducers of the necrotic hypersensitive-like response and the associated systemic acquired resistance phenomenon, in some species. we cloned and characterised the cinnamomin-beta and -alpha genes and two related elicitin genes from phytophthora cinnamomi. these four open reading frames (orfs) are clustered in tandem pairs ... | 1998 | 10520754 |
| ecology of hymexazol-insensitive pythium species in field soils. | soils from 100 irrigated fields (95 under vegetables, 5 under citrus) in different geographical locations in the west bank (palestinian autonomous territory) were surveyed for hymexazol-insensitive (his) pythium species using the surface soil dilution plate (ssdp) method with the vp3 medium amended with 50 mg/l hymexazol (hmi) (vp3h50), over a period of 12 months. his pythium species were isolated from 37% of the soils surveyed, with mean population levels ranging from 4.3-1422 cfu g(-1) dry wei ... | 2003 | 14682460 |
| organic acids and water-soluble phenolics produced by paxillus sp. 60/92 together show antifungal activity against pythium vexans under acidic culture conditions. | ectomycorrhizal fungi can produce antifungal compounds in vitro as well as in symbiosis with the host plant that can reduce root diseases. the objective of this study was to isolate antifungal compounds from culture filtrate of paxillus sp. 60/92, which can form mycorrhizas with picea glehnii seedlings. culture filtrate of paxillus sp. 60/92 showed antifungal activity against pythium vexans at ph 3-4 but not at ph 5-10, although sterile mmn-b liquid medium (ph 3-10) did not show antifungal activ ... | 2005 | 14716537 |
| pythium vexans causing patch canker of rubber trees on hainan island, china. | this is the first report of patch canker disease of rubber trees (clone rrim600) in china. it is characterized by discrete irregular patches of rotted, discolored bark and wood, accompanied by a decrease in latex flow. a total of seven isolates of pythium vexans were obtained from the diseased bark of the trunks and roots of rubber trees. inoculating these isolates into healthy, mature rubber trees resulted in symptoms similar to patch canker and the same fungal species was re-isolated from the ... | 2005 | 15983748 |
| chemical response of picea glehnii seed-epiphytic penicillium species to pythium vexans under in vitro competitive conditions for mycelial growth. | the potential protection of picea glehnii seedlings from damping-off by seed-epiphytic penicillium species was investigated. we studied the chemical response of seed-epiphytic penicillium species (pen. cyaneum, pen. damascenum, and pen. implicatum) to pythium vexans, a damping-off fungus, in vitro. penicillium species were cultured singly or cocultured with pyt. vexans for 14 or 18 d, and mycelial growth, ph of culture filtrate, antifungal activity of the culture filtrate against pyt. vexans, an ... | 2005 | 16124252 |
| oogonial biometry and phylogenetic analyses of the pythium vexans species group from woody agricultural hosts in south africa reveal distinct groups within this taxon. | pythium vexans fits into the internal transcribed spacer (its) clade k sensu lévesque & de cock (2004). within clade k, p. vexans forms a distinct clade containing two enigmatic species, pythium indigoferae and pythium cucurbitacearum of which no ex-type strains are available. in south africa, as well as in other regions of the world, p. vexans isolates are known to be heterogeneous in their its sequences and may consist of more than one species. this study aimed to investigate the diversity of ... | 2010 | 21315313 |