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 PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Porter, M. A. Articles by Grodzinski, B. Search for Related Content PubMed PubMed Citation Articles by Porter, M. A. Articles by Grodzinski, B. Agricola Articles by Porter, M. A. Articles by Grodzinski, B.

Articles

Acclimation to High CO₂ in Bean ¹

Carbonic Anhydrase and Ribulose Bisphosphate Carboxylase

Department of Horticultural Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada

Young bean plants (Phaseolus vulgaris L. cv Seafarer) grew faster in air enriched with CO₂ (1200 microliters per liter) than in ambient CO₂ (330 microliters per liter). However, by 7 days when increases in overall growth (dry weight, leaf area) were visible, there was a significant decline (about 25%) in the leaf mineral content (N, P, K, Ca, Mg) and a drop in the activity of two enzymes of carbon fixation, carbonic anhydrase and ribulose 1,5-bisphosphate (RuBP) carboxylase under high CO₂. Although the activity of neither enzyme was altered in young, expanding leaves during the acclimation period, in mature leaves the activity of carbonic anhydrase was reduced 95% compared with a decline of 50% in ambient CO₂. The drop in RuBP carboxylase was less extreme with 40% of the initial activity retained in the high CO₂ compared with 50% in the ambient atmosphere. While CO₂ enrichment might alter the flow of carbon into the glycolate pathway by modifying the activities of carbonic anhydrase or RuBP carboxylase, there is no early change in the ability of photosynthetic tissue to oxidize glycolate to CO₂.

This article has been cited by other articles:

				H. Usuda Effects of Elevated CO2 on the Capacity for Photosynthesis of a Single Leaf and a Whole Plant, and on Growth in a Radish Plant Cell Physiol., February 1, 2006; 47(2): 262 - 269. [Abstract] [Full Text] [PDF]

				H. Sasaki, T. Hirose, Y. Watanabe, and R. Ohsugi Carbonic Anhydrase Activity and CO2-Transfer Resistance in Zn-Deficient Rice Leaves Plant Physiology, November 1, 1998; 118(3): 929 - 934. [Abstract] [Full Text]