Inhibition of ethylene production by rhizobitoxine

Journal Article · Thu Jan 01 04:00:00 EST 1970 · Plant Physiol.; (United States)

OSTI ID:5196944

Owens, L D; Lieberman, M; Kunishi, A

Rhizobitoxine, an inhibitor of methionine biosynthesis in Salmonella typhimurium, inhibited ethylene production about 75% in light-grown sorghum seedlings and in senescent apple tissue. Ethylene production stimulated by indoleacetic acid and kinetin in sorghum was similarly inhibited. With both apple and sorghum, the inhibition could only be partially relieved by additions of methionine. A methionine analogue, ..cap alpha..-keto-..gamma..-methylthiobutyric acid, which has been suggested as an intermediate between methionine and ethylene, had no effect on the inhibition. Incorporation of /sup 14/C from added methionine-/sup 14/C into ethylene was curtailed by rhizobitoxine to about the same extent as was ethylene production. These results suggest that rhizobitoxine interferes with ethylene biosynthesis by blocking the conversion of methionine to ethylene and not indirectly by inhibiting the biosynthesis of methionine. Ethylene production by Penicillium digitatum, a fungus which produces ethylene via pathways not utilizing methionine as a precursor, was not affected by rhizobitoxine. 16 references, 2 figures, 4 tables.

• Research Organization: Dept. of Agriculture, Beltsville, MD
• OSTI ID: 5196944
• Journal Information: Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 48; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

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59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKENES
AMINO ACIDS
APPLES
BACTERIA
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BIOSYNTHESIS
CARBON 14
CARBON ISOTOPES
CARBOXYLIC ACIDS
CEREALS
DRUGS
ENZYME INHIBITORS
ETHYLENE
EVEN-EVEN NUCLEI
FOOD
FRUITS
FUNGI
GRASS
HYDROCARBONS
INHIBITION
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
LIPOTROPIC FACTORS
METHIONINE
MICROORGANISMS
NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PENICILLIUM
PLANTS
RADIOISOTOPES
SALMONELLA
SALMONELLA TYPHIMURIUM
SEEDLINGS
SORGHUM
SYNTHESIS
TRACER TECHNIQUES
YEARS LIVING RADIOISOTOPES