Photosynthetic acclimation and productivity of mungbean cultivars under elevated CO2 concentration

Mungbean [Vigna radiata (L.) Wilczek] cultivars (Pusa Baisakhi, PS 16 and P 105) were grown in field at atmospheric (360 ± 10 ppm, AC) and elevated CO2 (650 ± 50 ppm, EC) concentrations inside open top chambers for entire period of growth and development till maturity. Leaf net photosynthesis rate (...

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Bibliographic Details
Published in:Journal of agronomy and crop science (1986) 2004-04, Vol.190 (2), p.81-85
Main Authors: Sharma-Natu, P, Pandurangam, V, Ghildiyal, M.C
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
CO2 concentration
dry matter
Fundamental and applied biological sciences. Psychology
mungbean
photosynthetic acclimation
saccharides
seed yield
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Summary:Mungbean [Vigna radiata (L.) Wilczek] cultivars (Pusa Baisakhi, PS 16 and P 105) were grown in field at atmospheric (360 ± 10 ppm, AC) and elevated CO2 (650 ± 50 ppm, EC) concentrations inside open top chambers for entire period of growth and development till maturity. Leaf net photosynthesis rate (PN) of AC and EC grown plants when compared at same CO2 concentration showed no significant down‐regulation of PN in EC plants. In cv. P 105, even up‐regulation of PN was observed in EC plants. Mungbean cultivars accumulated assimilates in the leaves during the day mostly in the form of starch. Nodule number and weight were also higher in EC plants. The positive effect of elevated CO2 on PN, dry‐matter production and seed yield was better expressed in cv. P 105 having greater podding ability.
ISSN:0931-2250
1439-037X
DOI:10.1046/j.1439-037X.2003.00077.x