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Effect of carbon dioxide-enrichment on tobacco


Awang, Muhamad and A. Halim, Ridzwan (1990) Effect of carbon dioxide-enrichment on tobacco. Transactions of the Malaysian Society of Plant Physiology, 1. pp. 79-82. ISSN 0128-9004


Three-wk old seedlings of tobacco variety Bell-W3 and Bell-B were grown in growth chambers under sunlight and subjected to 3 levels of ambient CO2 concentrations: 300-315 (low), 350-400 (medium) and 600-700 (high) umol mol-1.Weekly measurements of rates of photosynthesis, respiration, transpiration, diffusive resistance and chlorophyll content were taken for 5 wks after which plants were harvested for dry matter yield estimations. Photosynthetic and respiratory rates showed a trend for a quadratic increase with increasing CO2 levels. Variety Bell-W3 had a 27% greater rate of photosynthesis and 12% greater chlorophyll content than variety Bell-B. Variety Bell-W3 also showed a 50% increase in total yield at the high CO2 compared to the medium and low CO2 treatments. No differences in yield was obtained for variety Bell-B. The differences in response between the two varieties may be associated with their inherent photosynthetic capacity.

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Additional Metadata

Item Type: Article
Divisions: Universiti Pertanian Malaysia
Publisher: Malaysian Society of Plant Physiology
Notes: Persidangan Pertama Fisologi Tumbuhan, Universiti Pertanian Malaysia, Serdang, Selangor, 14-15 August 1990
Keywords: Tobacco; Seedlings; Photosynthesis
Depositing User: Mohd Hafiz Che Mahasan
Date Deposited: 05 May 2016 07:29
Last Modified: 05 May 2016 07:29
URI: http://psasir.upm.edu.my/id/eprint/47355
Statistic Details: View Download Statistic

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