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Journal Article

Stomatal Penetration of Wheat Seedlings by Stem and Leaf Rust: Effect of Light and Carbon Dioxide

Dagnatchew Yirgou and Ralph M. Caldwell
New Series, Vol. 141, No. 3577 (Jul. 19, 1963), pp. 272-273
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Page Count: 2

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Topics: Stomata, Seedlings, Carbon dioxide, Fungi, Atmospherics
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Removal of atmospheric carbon dioxide enhanced penetration of seedling wheat by stem rust Puccinia graminis in light and dark but did not materially affect penetration by leaf rust P. recondita. A concentration of 5 percent CO$_{2}$ nearly suppressed penetration by P. graminis but not by P. recondita. Thus light may promote penetration by P. graminis through photosynthetic reduction of CO$_{2}$ within the leaf and P. recondita may penetrate independently of light because it is relatively insensitive to the effects of CO$_{2}$.

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