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Photosynthesis of Sago Palm ( Metroxylon sagu Rottb.) Seedling at Different Air Temperatures

Author

Listed:
  • Aidil Azhar

    (Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-0814, Japan
    Vocational School, Bogor Agricultural University, Bogor 16680, Indonesia)

  • Daigo Makihara

    (International Cooperation Center for Agricultural Education, Nagoya University, Nagoya 464-0814, Japan)

  • Hitoshi Naito

    (College of Life Science, Kurashiki University of Science and The Arts, Kurashiki 712-8505, Japan)

  • Hiroshi Ehara

    (International Cooperation Center for Agricultural Education, Nagoya University, Nagoya 464-0814, Japan
    Applied Social System Institute of Asia, Nagoya University, Nagoya 464-0814, Japan)

Abstract

Photosynthetic activities of the sago palm ( Metroxylon sagu Rottb.) were studied to find out its sensitivity to changes in ambient air temperature. The minimum ambient air temperature designed for the experiment was 25–29 °C, while the higher end was 29–33 °C. Several photosynthetic parameters were studied to support our analysis in sago photosynthetic activity, including diurnal leaf gas exchange, assimilation rate vs. CO 2 concentration, leaf greenness, leaf chlorophyll content, and photosynthetic rate vs. irradiance. We found that sago palm photosynthetic activity tends to be more sensitive to minimum than to maximum ambient air temperature. The plants exposed to higher air temperatures had dark green leaf color associated with higher rates of diurnal photosynthesis, chlorophyll content, and rubisco limited photosynthetic activity. They also exhibited higher trend in optimum irradiance absorption level. Consequently, maximum light energy dissipation occurred at higher temperatures.

Suggested Citation

  • Aidil Azhar & Daigo Makihara & Hitoshi Naito & Hiroshi Ehara, 2018. "Photosynthesis of Sago Palm ( Metroxylon sagu Rottb.) Seedling at Different Air Temperatures," Agriculture, MDPI, vol. 8(1), pages 1-10, January.
    • Handle: RePEc:gam:jagris:v:8:y:2018:i:1:p:4-:d:124941
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