Elevated CO2, temperature, and N effects on the photosynthesis of rice
Rice (Oryza sativa L. cv. IR72) was grown in growth chambers under all combinations of two CO2 concentration (375 and 750 mL/L), temperature (29/21 and 34/26 deg C day/night) and N concentration (40 and 80 mg/L) regimes. The stimulation of photosynthetic rates at elevated CO2 in both levels of tempe...
Saved in:
Published in | Acta Manilana. Series B: Socio-economic and historical sciences Vol. 47 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
1999
|
Subjects | |
Online Access | Get more information |
Cover
Loading…
Summary: | Rice (Oryza sativa L. cv. IR72) was grown in growth chambers under all combinations of two CO2 concentration (375 and 750 mL/L), temperature (29/21 and 34/26 deg C day/night) and N concentration (40 and 80 mg/L) regimes. The stimulation of photosynthetic rates at elevated CO2 in both levels of temperature and N treatments was maintained until flowering. Rubisco total activity and content increased with elevated CO2 and ambient temperature in both N treatments at 47 days after sowing (DAS), but declined in CO2-enriched plants at flowering under both temperature and N treatments. CO2-enriched plants at ambient temperature had higher overall leaf soluble sugar and starch contents. There was accumulation of starch in the leaves of CO2-enriched plants grown at ambient temperature and low N at flowering. Rice plants cv. IR72 have a high optimum temperature for photosynthesis under future global warming conditions |
---|---|
Bibliography: | F60 2000101301 |
ISSN: | 0065-1370 |