The nucleoside and nucleotide contents of uredospores fromPuccinia graminis andPuccinia striiformis and of conidia fromErysiphe graminis, Erysiphe pisi, andTrichoderma harzianum

Pils, Anne L.; Backer, A.I.; Guduthur, Anupama; Grabo, Perry; Wagner, Karl

doi:10.1016/0147-5975(91)90004-w

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…In previous work we compared the nucleotide pools of different rust uredospores and powdery mildew conidia (PILS et al 1991) and discussed correlations with the germination efficiency. Figure 1 shows the pools of individual metabolites of ungerminated uredospores from P. graminis.…”

Section: Resultsmentioning

confidence: 99%

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Early Changes in the Nucleotide Pools of Germinating Rust Uredospores

Grabo

Wagner

1991

Journal of Phytopathology

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Puccinia graminis uredospores were induced to germinate on a water surface and the nucleotide/nucleoside pools were determined by high performance liquid chromatography. Distinct phases of germination could be discriminated by correlating the changes of individual nucleotide pools with characteristic morphological changes. During the first 15 min no visible changes of the cell wall were observed whereas the adenine nucleotide pools increased strongly indicating an activation of the energy metabolism. The stage preceding hyphal growth revealed large increases in the precursor pool for cell wall synthesis (UDP‐N‐acetylglucosamine). The early phases of germination are obviously controlled by distinct metabolic transitions. Furthermore, correlations of pool contents and changes during germination with the germination efficiency of the three uredospore batches investigated are discussed.

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Section: Resultsmentioning

confidence: 99%

“…Extraction of the homogenized material (20 mg) with a total of 2 ml 0.44 M HCIO4, purification of the extract, and the HPLC analyses were performed as previously described (MEYER and WAGNER 1985, SAWERT et al 1987a, PiLS et al 1991). An acidic extract was prepared from each sample.…”

Section: Methodsmentioning

confidence: 99%

Early Changes in the Nucleotide Pools of Germinating Rust Uredospores

Grabo

Wagner

1991

Journal of Phytopathology

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Changes in the nucleoside-nucleotide pools of Uromyces viciae-fabae uredospores during imbibition at low temperature

Wagner¹,

Backer²,

Wagner³

1994

Physiological and Molecular Plant Pathology

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Changes in Metabolite Pools in Host and Pathogen during the Uredinio and Teliospore Development of the Bean Rust Fungus Uromyces appendiculatus

Götz¹,

Boyle²

1998

Journal of Phytopathology

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Metabolite pool sizes as well as indications for changes in the translocation of metabolites from the host to the parasite were investigated on primary leaves of decapitated bean plants infected with the bean rust fungus Uromyces appendiculatus var. appendiculatus (Pers.) Link with respect to changes in the spore type from uredinioto teliospores. Noninfected control leaves were compared to the directly infltjenced sorus region of infected leaves and the mycelium-free areas of these leaves ('leaf-remainder').The data show evidence for an intensive change in the metabolite pools, indicating translocation from the metabolically active leaf-remainder to the sori, expressing characteristic changes according to the spore type produced. The importance of single metabolites and changes in their pool sizes is discussed and correlated to the respective pools within the uredinio-and teliospores. The data indicate that vegetative urediniospores contain mainly preformed metabohtes and precursors, whereas teliospores need to undergo metabolite syntheses before germination.

show abstract

The nucleoside and nucleotide contents of uredospores fromPuccinia graminis andPuccinia striiformis and of conidia fromErysiphe graminis, Erysiphe pisi, andTrichoderma harzianum

Cited by 3 publications

References 15 publications

Early Changes in the Nucleotide Pools of Germinating Rust Uredospores

Early Changes in the Nucleotide Pools of Germinating Rust Uredospores

Changes in the nucleoside-nucleotide pools of Uromyces viciae-fabae uredospores during imbibition at low temperature

Changes in Metabolite Pools in Host and Pathogen during the Uredinio and Teliospore Development of the Bean Rust Fungus Uromyces appendiculatus

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