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KMID : 0903619940350040309
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Journal of the Korean Society for Horticultural Science
1994 Volume.35 No. 4 p.309 ~ p.317
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Effect of Long Term CO2 Enrichment on Chlorophyll , Starch , Soluble Protein Content , and RuBPCase Activity in Tomato Plants
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Abstract
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The tomato plant (Lycopersicon esculentum Mill cv. Kwansu) was acclimated with long-term CO₂ enrichment of 800 ppm and 2400 ppm in greenhouse. This plant was studied to clarify the changes of starch, chlorophyll, soluble protein, and RuBPCase activity in the tomato leaves. Starch accumulation by means of CO₂ enrichment increased in the plant enriched with CO₂ 800 ppm, especially in the upper part of the plant, and tended to increase continuously after the CO₂ enrichment. Chlorophyll and soluble protein content per fresh weight in the CO₂-enriched tomato leaves declined linearly with the age of leaves and those components rapidly decreased in the leaves of CO₂ 800 ppm enrichment. RuBPCase activity of the tomato plant in the CO₂-enriched house rapidly decreased with the age of the tomato plant than the ambient plant. The RuBPCase activity below the optimum nitrogen concentration decreased than that in the CO₂ enrichment, but the activity in the CO₂ enrichment increased in the higher nitrogen concentration than in the optimum nitrogen concentration. The more nitrogen concentration in the plant, the more increase of RuBPCase activity, and the decrease of the activity of RuBPCase was rapid more than the decrease of nitrogen content in the tomato leaves.
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