ダイズの葉の調位運動が乾物生産および光阻害に及ぼす影響   :   Effects of Leaf Movement on Dry Matter Production and Photoinhibition in Field Grown Soybean 

作成者 磯田, 昭弘, 戸間替, 崇
作成者 (ヨミ) イソダ, アキヒロ, トマガエ, タカシ
作成者の別表記 Isoda, Akihiro, Tomagae, Takashi
日本十進分類法 (NDC) 620
内容 開花期盛期より収穫期までダイズ群落上層を防雀網で覆い, 群落上層の小葉の調位運動を抑える処理を行い, 調位運動を抑えない無処理区と比較し, 葉の調位運動が乾物生産特性および光合成の光化学系IIに及ぼす影響を検討した.処理期間中の生長パラメータの個体群生長速度, 葉面積指数, 純同化率は両区で有意な差がみられなかった.収量および収量構成要素にも有意な差はみられなかった.8月中旬の晴天日における葉温は, 処理区が日中大きく推移し, 無処理区に比べ最大で5.5℃高くなった.光化学系IIの量子収量(Φ_<PSII>)および非光化学的クエンテング(NPQ)は, 8月16日を除き処理期間中, 両区に有意な差がみられなかった.処理期間中, 処理により上昇したものの葉温は40℃以下に抑えられたこと, 9月は圃場に水分が足りない状態ではなかったと思われることから, 光化学系IIの効率低下や光阻害が起こらず, 乾物生産にも影響がなかったものと考えられた.
Effects of leaf movement on dry matter production, yield and photosystem II (PSII) in soybean were examined. The leaves of the upper layers of the canopy were restrained by a net during the period from the flowering stage to the harvesting sage, as compared with non-restraining treatment of leaves. There was no significant difference in the growth parameters (crop growth rates, leaf area index and net assimilation rates) between the treatments during the treated period. Differences in the seed yield and yield components were not also found between the treatments. The leaf temperature in the plot of the restraining leaves was higher than the non-restraining treatment during daytime. Though the maximum difference was 5.5℃ between the treatments on 16 Aug., the maximum leaf temperature of the treated plot was lower than 40℃. There were not found significant differences between the treatments in quantum yield of photosystem II (Φ_<PSII>) and non-photochemical quenching (NPQ) except 16 Aug., which are concerning with the efficiency and photoinhibition in PSII, respectively. A less gain in the leaf temperature by the treatment in Aug. and enough available water in the field in Sept. might not reduce the efficiency in PSII, consequently not decrease dry matter production.

公開者 千葉大学園芸学部
コンテンツの種類 紀要論文 Departmental Bulletin Paper
DCMI資源タイプ text
ファイル形式 application/pdf
ISSN 0069-3227
NCID AN00142658
掲載誌情報 千葉大学園芸学部学術報告 Vol.57 page.1-5 (20030329)
情報源 The technical bulletin of Faculty of Horticulture, Chiba University
言語 日本語
著者版フラグ publisher

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