Water stress and Sphaeropsissapinea as a latent pathogen of red pine seedlings

•  The role of water stress in the initiation of collar rot by Sphaeropsis sapinea in asymptomatically colonized Pinus resinosa seedlings is reported. • Mortality and frequency of identification of the pathogen was quantified for seedlings subjected to different water regimes or watering regime-fung...

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Veröffentlicht in:The New phytologist. - 1979. - 149(2001), 3 vom: 20. März, Seite 531-538
1. Verfasser: Stanosz, G R (VerfasserIn)
Weitere Verfasser: Blodgett, J T, Smith, D R, Kruger, E L
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2001
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Pinus resinosa (red pine) Sphaeropsis sapinea canker collar rot endophyte latent patnogen shoot blight water stress
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520 |a •  The role of water stress in the initiation of collar rot by Sphaeropsis sapinea in asymptomatically colonized Pinus resinosa seedlings is reported. • Mortality and frequency of identification of the pathogen was quantified for seedlings subjected to different water regimes or watering regime-fungicide (benomyl) combinations in glasshouse experiments. •  In experiment 1, seedling mortality ranged from 8% of repeatedly watered seedlings to 50% of those in the driest regime; data analysis indicated a high probability that mortality was not independent of watering regime. Seedlings developed symptoms resembling those of Sphaeropsis collar rot, and S. sapinea was identified from living (42%) and dead (92%) seedlings. In experiment 2, mortality of repeatedly watered seedlings was low, irrespective of fungicide application. For nonwatered seedlings, however, mortality was greater among seedlings not treated with fungicide (61%) than among benomyl-treated seedlings (37%); data analysis indicated a high probability that mortality was not independent of fungicide treatment. • Sphaeropsis sapinea can act as a latent pathogen; physiological alteration, through water stress, can effect release from the quiescent condition to result in rapid disease development 
650 4 |a Journal Article 
650 4 |a Pinus resinosa (red pine) 
650 4 |a Sphaeropsis sapinea 
650 4 |a canker 
650 4 |a collar rot 
650 4 |a endophyte 
650 4 |a latent patnogen 
650 4 |a shoot blight 
650 4 |a water stress 
700 1 |a Blodgett, J T  |e verfasserin  |4 aut 
700 1 |a Smith, D R  |e verfasserin  |4 aut 
700 1 |a Kruger, E L  |e verfasserin  |4 aut 
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