Effect of sulfur dioxide on physiological responses, cysteine, and glutathione in pepper and eggplant

Hyun Kyung Lee, Su Young Woo, Myeong Ja Kwak, Inkyin Khaine, Ie Reh Kim, Tae Yoon Lee, Ji Hwi Jang, Ha Na You, Won Il Kim

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


This study was carried out to investigate the photosynthetic rate, water use efficiency, chlorophyll content, morphological changes, and cysteine and glutathione contents of pepper and eggplant plants treated with 50 µg·kg-1 sulfur dioxide (SO2) in a controlled environment chamber. Plants were treated with 50 µg·kg-1 SO2 for 24 h/day in a naturally irradiated phytotron. After exposure, SO2 damage was examined by evaluating photosynthetic rate, water use efficiency (WUE), chlorophyll and carotenoid content, visible injury, stomata characteristics, and cysteine and glutathione content. The photosynthetic rate was significantly lower in treated plants compared to the control, and WUE increased with the SO2 treatment in both pepper and eggplant compared to untreated plants. The chlorophyll and carotenoid content also decreased in plants treated with SO2. The visible injury to leaves appeared after about 14 d of SO2 exposure in pepper and 18 d after SO2 exposure in eggplant. The leaves had yellow and white spots on their surface in both the pepper and eggplant plants. Over a period of SO2 exposure, necrosis was observed in both pepper and eggplant leaves. Stomatal density and size decreased in response to SO2 exposure in both of pepper and eggplant. The cysteine and glutathione levels significantly increased after SO2 exposure in both pepper and eggplant.

Original languageEnglish
Pages (from-to)487-500
Number of pages14
JournalHorticultural Science and Technology
Issue number4
StatePublished - 2018


  • Capsicum annuum L
  • Photosynthesis
  • SO
  • Solanum melongena L
  • Stomata
  • Water use efficiency


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