The Effects of Increased Atmospheric Carbon Dioxide on Growth, Carbohydrates, and Photosynthesis in Radish, Raphanus sativus

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概要

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• The effects of sink capacity on the regulation of the acclimation of photosynthetic capacity to elevated levels of carbon dioxide are important from a global perspective. We investigated the effeocts of elevated (750 μmol mol^<-1>) and ambient (350 μmol mol^<-1>) atmospheric CO_2 on growth, carbohydrate levels, and photosynthesis in radish seedlings from 15 to 46 d after planting. In radish, a major sink is the storage root, and its thickening is initiated early. Elevated CO_2 increased the accumulation of dry matter by 111% but had no effect on the acclimation of the rate of photosynthesis or on the levels of carbohydrates in leaves at dawn. Elevated CO_2 increased the dry weight in storage roots by 105% by 46 d after planting, apparently enhancing the sink capacity. This enhanced capacity seemed to be responsible for absorption of elevated levels of photosynthate and to result in the absence of any over-accumulation of carbohydrates in source leaves and the absence of negative acclimation of photosynthetic capacity at the elevated level of CO_2.

• 日本植物生理学会の論文

著者

• Usuda H

  Teikyo Univ. School Of Medicine Tokyo Jpn

• Usuda Hideaki

  Laboratory Of Chemistry Faculty Of Medicine Teikyo University

• Shimogawara Kousuke

  Laboratory of Chemistry, Teikyo University School of Medicine

• Shimogawara Kousuke

  Laboratory Of Chemistry Faculty Of Medicine Teikyo University

• Usuda Hideaki

  Laboratory Of Chemisry Teikyc University School Of Medicine

• Shimogawara Kousuke

  Laboratory of Chemistry, Teikyo University, School of Medicine

• Usuda Hideaki

  Laboratory of Chemistry, Teikyo University, School of Medicine

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