Full TGIF Record # 5459
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DOI:10.1111/j.1439-0434.1981.tb03355.x
Web URL(s):http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0434.1981.tb03355.x/pdf
    Last checked: 07/31/2013
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Author(s):Robinson, Ph. W.; Hodges, C. F.
Author Affiliation:Iowa State Univ., Ames, IA
Title:Nitrogen-induced changes in the sugars and amino acids of sequentially senescing leaves of Poa pratensis and pathogenesis by Drechslera sorokiniana
Source:Journal of Phytopathology. Vol. 101, No. 4, August 1981, p. 348-361.
Publishing Information:Berlin: Paul Parey Scientific Publishers
# of Pages:16
Keywords:TIC Keywords: Poa pratensis; Amino acids; Sugars; Bipolaris sorokiniana; Fertilizers; Nitrogen
Abstract/Contents:Following application of NH4NO3, total sugars increased in the 2 youngest leaves of the shoot and decreased in the 2 oldest. Total free amino acids increased significantly only in leaf 3 (leaf 1 being the youngest). Leaf 2 showed min. changes of specific amino acids. Leaves 2 and 3 were most responsive to development of D. sorokiniana (Cochliobolus sativus) on NH4NO3 treated plants. Pre-infection germination and growth of conidia on the surface of these leaves increased on fertilized plants, while post-infection disease development decreased on leaf 2 and increased on 3. These observations suggest that the 'high-low' sugar concept of plant disease must be differentially applied to sequentially developing and senescing leaves and that cultural factors may further modify such interactions. Results also suggest that the amino acid pool may have a greater influence on the pre-infection germination and growth of conidia on the leaf surface than that of sugars.
Language:English
References:38
Note:Summary in German
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Robinson, P. W., and C. F. Hodges. 1981. Nitrogen-induced changes in the sugars and amino acids of sequentially senescing leaves of Poa pratensis and pathogenesis by Drechslera sorokiniana. J. Phytopathol. 101(4):p. 348-361.
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DOI: 10.1111/j.1439-0434.1981.tb03355.x
Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0434.1981.tb03355.x/pdf
    Last checked: 07/31/2013
    Requires: PDF Reader
    Access conditions: Item is within a single large file
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MSU catalog number: SB 599 .P47
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