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Effects of elevated ozone on physiological, biochemical and morphological characteristics of eggplant

  • Yang Li
  • Su Young WooEmail author
  • Jong Kyu Lee
  • Myeong Ja Kwak
  • Inkyin Khaine
  • Ji Hwi Jang
  • Hae Naem Kim
  • Ji Eun Kim
  • Sang Hee Park
  • Han Dong Kim
  • Yea Ji Lim
Research Report
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Abstract

Air pollutants are emitted from various anthropogenic sources into the atmosphere. Especially, ozone (O3) has become a critical problem since the average O3 concentration is increasing every year by about 0.5–2% across the world. O3 in the air affects plant growth because it mainly passes through the stomata of leaves into plants. This experiment was designed to identify the physiological, morphological, and biochemical responses of plants to O3. For the purposes of this study, eggplant (Solanum melongena L.), which is one of the most well-known crops produced in the world, was used. Eggplants were continuously subjected to 110 nmol mol−1 for 25 days using the phytotron. Following O3 treatment, the growth and biomass of the eggplant were reduced, and the photosynthetic rates were lower than those of the controls. In contrast, water use efficiency increased progressively on the leaves of the eggplant. Initial visible injures were observed at 15 days after O3 treatment. Stomatal density was reduced in response to the O3 treatment. With regard to biochemical responses, malondialdehyde content and relative ion leakage were higher than those of the control. Superoxide and hydrogen peroxide accumulation was observed on the leaf surface after 25 days of O3 treatment. These observations indicate that treatment with 110 nmol mol−1 O3 had negative effects on the physiological, morphological, and biochemical activities of eggplant. Further studies investigating the damage caused by exposure to different concentrations of O3 and for different periods of time are required.

Keywords

Biomass O3 Photosynthetic rates Solanum melongena L. Visible injury 

Notes

Acknowledgements

This work was supported by the 2018 Research Fund of the University of Seoul.

Author contribution

LY and LJK carried out the experiments and wrote the manuscript. WSY, KMJ and KI designed the research. JJH, KHN, KJE, PSH, KHD and LYJ helped perform the experiments. All authors have read and approved the final manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

13580_2019_177_MOESM1_ESM.docx (170 kb)
Supplementary material 1 (DOCX 167 kb)

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Copyright information

© Korean Society for Horticultural Science 2019

Authors and Affiliations

  • Yang Li
    • 1
  • Su Young Woo
    • 1
    Email author
  • Jong Kyu Lee
    • 1
  • Myeong Ja Kwak
    • 1
  • Inkyin Khaine
    • 1
  • Ji Hwi Jang
    • 1
  • Hae Naem Kim
    • 1
  • Ji Eun Kim
    • 1
  • Sang Hee Park
    • 1
  • Han Dong Kim
    • 1
  • Yea Ji Lim
    • 1
  1. 1.Department of Environmental HorticultureUniversity of SeoulSeoulKorea

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