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Web URL(s): | http://www.apsnet.org/publications/plantdisease/backissues/Documents/1989Articles/PlantDisease73n05_398.PDF Last checked: 08/25/2010 Requires: PDF Reader |
Publication Type:
| Refereed |
Author(s): | Su, Mei-yu;
Hodges, Clinton F. |
Author Affiliation: | Junior Specialist of Technique Division, Department of Agriculture and Forestry, Taiwan Provincial Government, Chung-Hsing Village, Taiwan 54054, Republic of China, and Professor of Horticulture and Plant Pathology, Department of Horticulture, Iowa State University, Ames, IA 50011 |
Title: | Ethylene production by Bipolaris sorokiniana and Curvularia geniculata on methionine and inorganic salts |
Source: | Plant Disease. Vol. 73, No. 5, May 1989, p. 398-401. |
Publishing Information: | St. Paul, MN: American Phytopathological Society |
# of Pages: | 4 |
Keywords: | TIC Keywords: Chlorosis; Poa pratensis; Bipolaris sorokiniana; Ethylene; Infection; Fertilization; Curvularia geniculata; Methionine
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Abstract/Contents: | "Chlorosis of Poa pratensis leaves infected by Bipolaris sorokiniana is due in part to elevated levels of endogenous ethylene in response to infection. The severity of the disease also is often enhanced by fertilization. Chlorosis does not occur in response to leaf infection by Curvularia geniculata, and the lesions produced are not affected by fertilization. B. sorokiniana requires methionine (MET) for the production of ethylene, but the effect of fertilizer salts on ethylene production by the pathogen is unknown. The ability of C. geniculata to produce ethylene on MET or fertilizer salts is unknown. Research was initiated to evaluate the ability of B. sorokiniana and C. geniculata to produce ethylene on a complex medium (leaf blade infusion of Poa pratensis) and on a synthetic medium amended with 1 and 10 mM MET, (NH₄)₂SO₄, NH₄NO₃, or K₂SO₄. The two organisms produced ethylene in similar quantities on the unamended complex medium; no detectable level of ethylene was produced by either organism on the unamended synthetic medium. The addition of 1 or 10 mM MET to both media resulted in increased ethylene production by both organisms. Production was greatest (2,600-3,000 pmol) on the complex medium, with the two organisms producing similar amounts, except that production by C. geniculata declined after 5 days of growth on the complex medium amended with 10 mM MET. The two organisms produced similar amounts of ethylene on the MET-amended synthetic medium, but not as much as on the complex medium. The inorganic salts at 1 or 10 mM had no effect on ethylene production by either organism when added to the complex medium, and at 1 mM they had no effect on ethylene production by either organism when added to the complex medium, and at 1 mM they had no effect in the synthetic medium. The addition of 10 mM (NH₄)^D2SO₄ or NH₄NO₃ to the synthetic medium stimulated low-level ethylene production by B. sorokiniana but had little effect on C. geniculata." |
Language: | English |
References: | 23 |
Note: | Figures |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Su, M.-Y., and C. F. Hodges. 1989. Ethylene production by Bipolaris sorokiniana and Curvularia geniculata on methionine and inorganic salts. Plant Dis. 73(5):p. 398-401. |
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| MSU catalog number: SB 599 .P95 |
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