Measurement of ethylene emission from Japanese red pine (Pinus densiflora) under field conditions in NO(x)-polluted areas

A. Kume, N. Tsuboi, N. Nakatani, K. Nakane, N. Sakurai, N. Nakagawa, H. Sakugawa

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Emission of ethylene from the needles of Japanese red pine, Pinus densiflora, was measured in air-polluted areas in Hiroshima, Japan. We applied a suitable protocol to determine the rate of ethylene emission from the excised needles. The influence of excision of needles on ethylene emission was not detected during the first 4 h of incubation at 20°C. Ethylene emissions were low in the unpolluted (clean) areas regardless of the altitude or season. The emission of stress ethylene increased with the atmospheric NO2 concentration, suggesting that atmospheric NO(x) or related substances induced the higher ethylene emission in the polluted areas (near urban and industrial areas). In all cases, 1-year-old needles emitted significantly larger amounts of ethylene than the current needles. Ethylene emission did not increase evenly in the polluted areas, but the frequency of trees emitting high ethylene increased. Therefore, threshold rates for the baseline ethylene emission were proposed.

Original languageEnglish
Pages (from-to)389-394
Number of pages6
JournalEnvironmental Pollution
Issue number3
Publication statusPublished - Jan 1 2001
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

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