Paper · 2004 · Phytopathology

Characterization, In Vitro Culture, and Molecular Analysis of Thecaphora solani, the Causal Agent of Potato Smut

Orlando Andrade; Gastón Muñoz; Rafael Galdames; et al.

7
claims
12
verbatim quotes
28
citations
2
research areas
—
Not open access

Abstract

ABSTRACT The fungus Thecaphora solani (syn.: Angiosorus solani), the causal agent of potato smut, was cultivated in vitro for the first time. Teliospores obtained from galls of infected potato plants were used to inoculate commonly used solid and liquid media. The teliospores produced two kinds of vegetative tissue depending on the nutrient status of the media. A very slow radial-growing, hyaline, and septate mycelium, as usually seen in most of the in vitro-cultivated filamentous fungi, was obtained in wateragar medium after 30 to 40 days. On the other hand, a white, sponge-like mycelial mass was obtained in HCM + 1% activated charcoal, and on common potato dextrose agar or malt-yeast-peptone solid or liquid media, after 40 to 50 days under lab conditions. The identity among teliospores and the sponge-like mycelial mass was corroborated by DNA fingerprinting and partial sequencing of the large subunit (LSU) rDNA region. The sexual cycle of the pathogen was completed under lab conditions based on the development of teliospores on the sponge-like mycelial mass. The first attempt to reproduce the disease under controlled conditions was successful, inducing a gall in a cv. Desirée potato explant cultivated in vitro inoculated with radial-growing mycelia. Phylogenetic analysis of LSU rDNA data of the genus Thecaphora and other smut fungi confirmed the initial classification of the pathogen as T. solani.

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Claims 7

Observationobservedoriginal resultmeasured

Claim · model-written summary

The potato smut fungus Thecaphora solani was cultivated in vitro for the first time.

Taxon
Thecaphora solaniThecaphora solanie1
Outcome
cultivated in vitro for the first timee1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thecaphora solani
Thecaphora solani · TaxonWilliam M. Brown Jr., Bugwood.org · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“The fungus Thecaphora solani (syn.: Angiosorus solani), the causal agent of potato smut, was cultivated in vitro for the first time”

✓ located verbatim in the source · abstract, characters 9–140 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Teliospores produced a very slow radial-growing, hyaline, septate mycelium in water agar medium after 30 to 40 days.

Taxon
Thecaphora solaniThecaphora solanit0
Treatment
wateragar mediume1
Outcome
very slow radial-growing, hyaline, and septate myceliume1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thecaphora solani
Thecaphora solani · TaxonWilliam M. Brown Jr., Bugwood.org · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Thecaphora solani”

✓ located verbatim in the source · title, characters 62–79 · show in text ↑
e1

“A very slow radial-growing, hyaline, and septate mycelium, as usually seen in most of the in vitro-cultivated filamentous fungi, was obtained in wateragar medium after 30 to 40 days”

✓ located verbatim in the source · abstract, characters 364–545 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

A white, sponge-like mycelial mass was obtained in HCM + 1% activated charcoal and on potato dextrose agar or malt-yeast-peptone media after 40 to 50 days under lab conditions.

Taxon
Thecaphora solaniThecaphora solanit0
Outcome
white, sponge-like mycelial masse1
Setting
lab conditionse1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thecaphora solani
Thecaphora solani · TaxonWilliam M. Brown Jr., Bugwood.org · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Thecaphora solani”

✓ located verbatim in the source · title, characters 62–79 · show in text ↑
e1

“a white, sponge-like mycelial mass was obtained in HCM + 1% activated charcoal, and on common potato dextrose agar or malt-yeast-peptone solid or liquid media, after 40 to 50 days under lab conditions”

✓ located verbatim in the source · abstract, characters 566–766 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The identity of teliospores and the sponge-like mycelial mass was corroborated by DNA fingerprinting and partial LSU rDNA sequencing.

Taxon
Thecaphora solaniThecaphora solanit0
Outcome
identity among teliospores and the sponge-like mycelial masse1
Qualifier
corroborated by DNA fingerprinting and partial sequencing of the large subunit (LSU) rDNA regione1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thecaphora solani
Thecaphora solani · TaxonWilliam M. Brown Jr., Bugwood.org · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Thecaphora solani”

✓ located verbatim in the source · title, characters 62–79 · show in text ↑
e1

“The identity among teliospores and the sponge-like mycelial mass was corroborated by DNA fingerprinting and partial sequencing of the large subunit (LSU) rDNA region”

✓ located verbatim in the source · abstract, characters 768–933 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The sexual cycle of the pathogen was completed under lab conditions, based on teliospore development on the sponge-like mycelial mass.

Taxon
Thecaphora solaniThecaphora solanit0
Outcome
sexual cycle of the pathogen was completede1
Setting
lab conditionse1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thecaphora solani
Thecaphora solani · TaxonWilliam M. Brown Jr., Bugwood.org · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Thecaphora solani”

✓ located verbatim in the source · title, characters 62–79 · show in text ↑
e1

“The sexual cycle of the pathogen was completed under lab conditions based on the development of teliospores on the sponge-like mycelial mass”

✓ located verbatim in the source · abstract, characters 935–1075 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Inoculation of an in vitro cv. Desirée potato explant with radial-growing mycelia induced a gall.

Material
cv. Desiréee1
Organ / stage
explante1
Treatment
inoculated with radial-growing myceliae1
Interactor
Thecaphora solaniThecaphora solanit0pathogen
Outcome
galle1

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Thecaphora solani
Thecaphora solani · InteractorWilliam M. Brown Jr., Bugwood.org · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Thecaphora solani”

✓ located verbatim in the source · title, characters 62–79 · show in text ↑
e1

“inducing a gall in a cv. Desirée potato explant cultivated in vitro inoculated with radial-growing mycelia”

✓ located verbatim in the source · abstract, characters 1164–1270 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Phylogenetic analysis of LSU rDNA data of Thecaphora and other smut fungi confirmed the classification of the pathogen as T. solani.

Taxon
T. solaniThecaphora solanie1
Outcome
initial classification of the pathogen as T. solanie1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thecaphora solani
Thecaphora solani · TaxonWilliam M. Brown Jr., Bugwood.org · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Phylogenetic analysis of LSU rDNA data of the genus Thecaphora and other smut fungi confirmed the initial classification of the pathogen as T. solani”

✓ located verbatim in the source · abstract, characters 1272–1421 · show in text ↑