Full TGIF Record # 5691
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DOI:10.1139/b78-138
Web URL(s):http://www.nrcresearchpress.com/doi/pdf/10.1139/b78-138
    Last checked: 07/18/2012
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
Publication Type:
i
Refereed
Author(s):Hodges, C. F.; Madsen, J. P.
Author Affiliation:Department of Horticulture, Iowa State University, Ames, Iowa, USA
Title:The competitive and synergistic interactions of Drechslera sorokiniana and Curvularia geniculata on leaf spot development on Poa pratensis
Source:Canadian Journal of Botany. Vol. 56, No. 10, May 15 1978, p. 1240-1247.
# of Pages:8
Related Web URL:http://www.nrcresearchpress.com/doi/abs/10.1139/b78-138
    Last checked: 07/18/2012
    Notes: Abstract only
Keywords:TIC Keywords: Poa pratensis; Bipolaris sorokiniana; Curvularia geniculata
Abstract/Contents:"Research was initiated to determine interactions between Drechslera sorokiniana and Curvularia geniculata in a potential disease complex on Poa pratensis. Inoculations with D. sorokiniana resulted in the greatest disease severity at 20 and 25 °C: disease severity was minimal with C. geniculata inoculations at all temperatures. Inoculations with the combination of both organisms displayed competitive and synergistic interactions that were temperature dependent. Combination inoculations reduced disease severity below that produced by D. sorokiniana alone and increased disease severity above that produced by C. geniculata alone at 20 and 25 °C and was indicative of a competitive interaction. Inoculations with the combination of the organisms increased disease severity above that produced by either organism alone at 30 °C, indicative of a synergistic effect at higher temperatures. Reisolations of the organisms from lesions produced from inoculations with the combination of the organisms indicated that C. geniculata competes more successfully for infected tissue than D. sorokiniana but is dependent on lesions initiated by D. sorokiniana to establish successfully. Competition for tissue colonization by C. geniculata is greatest at temperatures of 25 to 35 °C. It was concluded that C. geniculata should be recognized as a weak, high-temperature, primary-leaf infecting pathogen of P. pratensis, that a true disease complex relative to disease severity can exist between the organisms at 30 °C that is dependent on lesions initiated by D. sorokiniana and reflects the high-temperature aggressiveness of C. geniculata, that tissue invaded by both organisms is more successfully colonized by C. geniculata at higher temperatures, and that the necrotic portions of lesions produced by D. sorokiniana, and on which this organism does not sporulate well, is the probable site of establishment for C. geniculata where the organisms are found together."
Language:English
References:21
Note:Summary also appears in French
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hodges, C. F., and J. P. Madsen. 1978. The competitive and synergistic interactions of Drechslera sorokiniana and Curvularia geniculata on leaf spot development on Poa pratensis. Can. J. Bot. 56(10):p. 1240-1247.
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DOI: 10.1139/b78-138
Web URL(s):
http://www.nrcresearchpress.com/doi/pdf/10.1139/b78-138
    Last checked: 07/18/2012
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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MSU catalog number: QK 1 .C3
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