This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Web of Science (9) Citing Articles via Google Scholar Google Scholar Articles by Kana, T. M. Articles by Miller, J. H. Search for Related Content PubMed PubMed Citation Articles by Kana, T. M. Articles by Miller, J. H. Agricola Articles by Kana, T. M. Articles by Miller, J. H.

Articles

Effect of Colored Light on Stomatal Opening Rates of Vicia faba L ¹

^a Biological Research Laboratory, Syracuse University, Syracuse, New York 13210

The average opening rate of Vicia faba L. stomata was determined over an initial 20-minute light period following darkness. Nonsaturating intensities of broad band red and blue light had similar quantum effectiveness for the promotion of opening, whereas broad band green was about 40% and far red about 5% as effective. The opening rates under saturating red, green, and blue light were the same. Net photosynthesis was measured under various intensities of the same red, green, and blue light spectra. Red and blue light were equally efficient in causing photosynthesis, whereas green was 60% as effective. The light compensation points for the three colors were at higher intensities than those which saturated the opening rate response. These data suggest that only a single pigment system, probably the photosynthetic pigments, is responsible for initiating the light-induced opening response in V. faba stomata.

¹ This work was supported in part by a Sigma Xi Grant-in-Aid of Research to T. M. K.