Setosphaeria prolata, the Ascigerous State of Exserohilum prolatum

Mycologia ◽  
1974 ◽  
Vol 66 (2) ◽  
pp. 281 ◽  
Author(s):  
K. J. Leonard ◽  
Edna G. Suggs
Keyword(s):  
Ascigerous State

scholarly journals First Report of Guignardia psidii, an Ascigerous State of Phyllosticta psidiicola, Causing Fruit Rot on Guava in Venezuela

Plant Disease ◽  
2005 ◽  
Vol 89 (7) ◽  
pp. 773-773 ◽  
Author(s):  
M. S. González ◽  
A. Rondón
Keyword(s):  
Psidium Guajava ◽  
Potato Dextrose Agar ◽  
Fruit Rot ◽  
Symptom Development ◽  
First Report ◽  
Guava Fruit ◽  
Pathogenicity Tests ◽  
Apical Appendage ◽  
Ascigerous State ◽  
Gelatinous Envelope

During August 2003, guava fruit (Psidium guajava L.) cv. Red Dominicana from Cojedes state in Venezuela showed circular, purple-to-brown lesions (0.5 to 1.0 cm) that spread over all surfaces and became black and shrunken on severely affected fruit. Symptomatic tissues were plated aseptically on potato dextrose agar (PDA). Colonies that were initially gray and turned black with age were consistently isolated. The fungus was characterized by dense, submerged, brown-to-black mycelium with septate hyphae. Ascocarps were perithecial, abundant, granulose, subglobose to cylindric obpyriform, solitary or aggregated, mostly unilocular with prominent long necks; ascocarp walls were stromatic, composed of several layers of cells, thick walled, and deeply pigmented on the outside. Asci were subclavate to cylindrical, stipitate, 44 to 84 × 7 to 9 μm, and eight-spored; asci walls were thick and bitunicate. Ascospores were unicellular, hyaline, guttulate, fusiform ellipsoid, widest in the mid-region with rounded ends and gelatinous plugs, and 12 to 17 × 4.5 μm. Conidiomata were pycnidial, intermixed among ascocarps, variable in shape, dark brown, solitary or aggregated, ostiolate, and with long necks up to 1 mm. Pycnidial walls were pseudoparenchymatic, multicellular, and composed of many layers of brown compressed cells. Conidiogenous cells were hyaline, subglobose to cylindrical, and smooth, and holoblastic. Conidia were hyaline, unicellular, obovate, 6 to 12 (7.5) × 5 to 8 μm, slightly truncate at the bases, rounded at apices, guttulate, and provided a gelatinous envelope and apical appendage. Appendages were hyaline, tubular, smooth, and 3.0 to 4.5 × 0.5 μm. The fungus is homothallic because single ascospores and single conidia developed ascigerous states. The ascigerous state was identified as Guignardia psidii (1) and the anamorph as Phyllosticta psidiicola (1,2). Pathogenicity tests were conducted on detached fruits inoculated with monosporic cultures. Pathogenesis and symptom development only occurred when a mixture of mycelium, ascospores, and conidia was used as inoculum. The fungus was reisolated from symptomatic fruit tissues. To our knowledge, this is the first report of Guignardia psidii, an ascigerous state of Phyllosticta psidiicola from guava fruits in Venezuela. References: (1) B. A. Ullasa and R. D. Rawal. Curr. Sci. 53:435, 1984. (2) H. A. van der Aa. Page 95 in: No. 5, Stud. Mycol., 1973.

Setosphaeria Prolata, The Ascigerous State of Exserohilum Prolatum

Mycologia ◽  
1974 ◽  
Vol 66 (2) ◽  
pp. 281-297 ◽  
Author(s):  
K. J. Leonard ◽  
Edna G. Suggs
Keyword(s):  
Ascigerous State

The ascigerous state of Candida chodatii

1976 ◽  
Vol 42 (3) ◽  
pp. 309-314 ◽  
Author(s):  
J. A. von Arx ◽  
J. P. van der Walt
Keyword(s):  
Ascigerous State

Pseudocochliobolus australiensis, the Ascigerous State of Bipolaris australiensis

Mycologia ◽  
1981 ◽  
Vol 73 (1) ◽  
pp. 88 ◽  
Author(s):  
Mitsuya Tsuda ◽  
Akinori Ueyama
Keyword(s):  
Ascigerous State

The ascigerous state ofMicrosporum cookei

1962 ◽  
Vol 1 (3) ◽  
pp. 173-177 ◽  
Author(s):  
L. Ajello
Keyword(s):  
Ascigerous State

Pseudocochliobolus Australiensis, the Ascigerous State ofBipolaris Australiensis

Mycologia ◽  
1981 ◽  
Vol 73 (1) ◽  
pp. 88-96 ◽  
Author(s):  
Mitsuya Tsuda ◽  
Akinori Ueyama
Keyword(s):  
Ascigerous State

Diaporthe lokoyae n. sp., the perfect state of Phomopsis lokoyae

1968 ◽  
Vol 46 (5) ◽  
pp. 601-603 ◽  
Author(s):  
A. Funk
Keyword(s):  
New Species ◽  
Pseudotsuga Menziesii ◽  
Tsuga Heterophylla ◽  
Douglas Fir ◽  
Western Hemlock ◽  
Perfect State ◽  
Ascigerous State ◽  
A New Species

A new species of Diaporthe, for which the name D. lokoyae Funk is proposed, is described on the host Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) and in culture. This Diaporthe is shown to be the ascigerous state of Phomopsis lokoyae Hahn. An outbreak of dieback in Douglas fir associated with this Diaporthe is described and discussed; a single occurrence on western hemlock (Tsuga heterophylla (Raf.) Sarg.) is reported.

Sign in / Sign up

Export Citation Format

Share Document