自然光下の測定によるウミショウブの光合成光化学効率の日変化

島田 菜摘, Gregory N. Nishihara, 寺田 竜太

doi:10.11233/aquaculturesci.70.277

自然光下の測定によるウミショウブの光合成光化学効率の日変化

DOI 日本農学文献記事索引 Web Site

島田菜摘

鹿児島大学大学院連合農学研究科
Gregory N. Nishihara

長崎大学海洋未来イノベーション機構環東シナ海環境資源研究センター
寺田竜太

鹿児島大学大学院連合農学研究科

書誌事項

タイトル別名

Diurnal change of the photochemical efficiency in a seagrass, <i>Enhalus acoroides</i>, based on the measurement under incident sunlight
シゼンコウカノソクテイニヨルウミショウブノコウゴウセイコウカガクコウリツノニチヘンカ

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説明

<p>The diurnal change in photochemical efficiency of a seagrass, Enhalus acoroides was determined in Okinawa, Japan. The measurements under incident sunlight were conducted from sunrise through sunset using a submersible pulse amplitude modulation (PAM)-chlorophyll fluorometer (Diving-PAM). The effective quantum yield (ΔF/F_m’) declined with increasing incident sunlight in the morning, with a ΔF/F_m’ minima occurring during noon-time. Thereafter, the ΔF/F_m’ gradually recovered during the afternoon incident sunlight decreased, indicating a dynamic negative response to the excess sunlight. The decline of ΔF/F_m’ in the habitat is likely a photoprotective response to protect the photosynthetic reaction center from damage by excess light energy.</p>