biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 43:587-590, 2000 | DOI: 10.1023/A:1002810923897

Maintenance Respiration of Oryza sativa Leaves at Different Growth Stages as Influenced by Nitrogen Supply

P. Swain1, M.J. Baig1,*, S.K. Nayak1
1 Plant Physiology Division, Central Rice Research Institute, Cuttack, Orissa -, India

Maintenance respiration rate, RM, irrespective of growth stages, increased with increase in nitrogen supply. The RM increased almost in proportion with net photosynthetic rate, PN, and biomass production during early growth stages, while it declined after anthesis. Significant positive correlation was observed between biomass production and PN at all growth stages except tillering. Though RM was positively correlated with biomass production during early growth stages, it was negatively correlated with the rate of increase in shoot biomass after flowering, which could indicate a possibility to identify certain cultivars endowed with low maintenance expenses despite building up biomass.

Keywords: biomass production; diurnal variation; photosynthetic rate; rice cultivars
Subjects: biomass production, maintenance respiration; cultivar differences, maintenance respiration; diurnal changes, maintenance respiration; maintenance respiration, development, N supply; net photosynthetic rate, maintenance respiration; nitrogen supply, maintenance respiration; Oryza sativa; photosynthetic rate, maintenance respiration; respiration, maintenance, development, N supply; rice cultivars, maintenance respiration

Published: December 1, 2000  Show citation

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Swain, P., Baig, M.J., & Nayak, S.K. (2000). Maintenance Respiration of Oryza sativa Leaves at Different Growth Stages as Influenced by Nitrogen Supply. Biologia plantarum, 43(4), 587-590. doi: 10.1023/A:1002810923897
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