コブノメイガに食害を受けたイネ葉身の光合成・呼吸特性

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タイトル別名
  • Photosynthetic and Respiration Rates of Leaves Damaged by Rice Leaf-folder Cnaphalocrocis medinalis GUENEE.
  • コブノメイガ ニ ショクガイ オ ウケタ イネ ヨウシン ノ コウゴウセイ コ

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説明

The rice leaf-folder Cnaphalocrocis medinalis GUENÉE is a serious pest in western Japan. We measured the net photosynthetic rate and dark respiration rate of undamaged, folded and damaged leaves using a portable system. The undamaged leaf net photosynthetic rate was 21.98μmol⋅m-2⋅s-1 at the leaf top and 21.81μmol⋅m-2⋅s-1 at the leaf base. The folded leaf net photosynthetic rate was 10.04-14.23μmol⋅m-2⋅s-1 or 42%-66% that of healthy leaves. The damaged leaf net photosynthetic rate of was -1.12μmol⋅m-2⋅s-1. The dark respiration rates of undamaged and damaged leaves were 0.45μmol⋅m-2⋅s-1 and 2.05μmol⋅m-2⋅s-1, respectively. The relationship between damaged leaf area (X) and net photosynthetic rate (Y) is Y=25.8-0.27X (r2=0.97, p<0.01). The relationship between damaged leaf area (X) and dark respiration rate (Y) is Y=0.36+0.019X (r2=0.68, p<0.01).

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