Effect of ozone on indicators of leaf aging. [Solanum tuberosum]
- Pennsylvania State Univ., University Park (United States)
Ozone (O{sub 3}) stress induces accelerated foliar senescence, as measured by a decline in ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco). The authors wish to determine (1) whether the decline in rubisco is under genetic regulation and (2) what role is played by ethylene and polyamines in modulating this response. Plants of Solanum tuberosum L. cv. Norland were grown in a charcoal filtered greenhouse and treated with 0.15 {mu}1 1{sup {minus}1} O{sub 3} in continuous stirred tank reactors for 4 h. Immediately, 4 h and 20 h after O{sub 3} exposure, the fourth, seventh and tenth leaves from the apex were harvested and the tissue analyzed for ethylene emission, ethylene forming enzyme, malonyl transferase, ACC, malonyl ACC, spermine, spermidine, putrescine, ornithine decarboxylase and messenger RNA for the large and small subunits of rubisco. Ozone induced changes in most of the variables studied and the response was most evident in the younger tissue. In contrast O{sub 3} induces accelerated senescence of the oldest tissue. The relationship between O{sub 3}-induced changes in younger foliage and accelerated aging of older tissue will be the subject of further investigation.
- OSTI ID:
- 5559388
- Report Number(s):
- CONF-9107184-; CODEN: PPYSA
- Journal Information:
- Plant Physiology, Supplement; (United States), Vol. 96:1; Conference: Annual meeting of the American Society of Plant Physiology, Albuquerque, NM (United States), 28 Jul - 1 Aug 1991; ISSN 0079-2241
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
LEAVES
PHYSIOLOGY
OZONE
TOXICITY
AGE DEPENDENCE
AMINES
BIOLOGICAL INDICATORS
COMPARATIVE EVALUATIONS
ENZYME ACTIVITY
ETHYLENE
GREENHOUSES
MESSENGER-RNA
RIBULOSE DIPHOSPHATE CARBOXYLASE
SOLANUM TUBEROSUM
ALKENES
BUILDINGS
CARBON-CARBON LYASES
CARBOXY-LYASES
ENZYMES
EVALUATION
HYDROCARBONS
LYASES
MAGNOLIOPHYTA
MAGNOLIOPSIDA
NUCLEIC ACIDS
ORGANIC COMPOUNDS
PLANTS
PROTEINS
RNA
SOLANUM
560300* - Chemicals Metabolism & Toxicology
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