* • Season-long effects of elevated CO2 concentration (CO2) on the carbon balance of the rice (Oryza sativa) canopy are reported here. The experiment was conducted in six sunlit, semiclosed growth chambers for an entire growing season. Rice plants (cv. Nipponbare) were grown at 350 µmol mol−1CO2 (ambient) in three chambers, or at 650 µmol mol−1 (elevated) in the other three chambers. Canopy net photosynthesis and night-time respiration were determined in the chambers by mass balance. Both canopy gross photosynthesis and total respiration, through the entire growing season, were increased by the CO2 enrichment. But CO2-induced variations in canopy carbon gain were mainly caused by changes in canopy photosynthesis. The enhancement of daily canopy gross photosynthesis by elevated CO2 was 33.4\% for the first 3 week, but it declined gradually and disappeared by heading. Enhancement of daily net carbon gain also decreased as rice plants grew. These results show that the increase in rice biomass by elevated CO2 results more from the increase in carbon gain at early rather than later stages of growth.
%0 Journal Article
%1 citeulike:12851123
%A Sakai, Hidemitsu
%A Yagi, Kazuyuki
%A Kobayashi, Kazuhiko
%A Kawashima, Shigeto
%D 2001
%I Blackwell Science Ltd
%J New Phytologist
%K chamber, citeulikeExport co2, face, photosynthesis, respiration, rice
%N 2
%P 241--249
%R 10.1046/j.1469-8137.2001.00105.x
%T Rice carbon balance under elevated CO2
%U http://dx.doi.org/10.1046/j.1469-8137.2001.00105.x
%V 150
%X * • Season-long effects of elevated CO2 concentration (CO2) on the carbon balance of the rice (Oryza sativa) canopy are reported here. The experiment was conducted in six sunlit, semiclosed growth chambers for an entire growing season. Rice plants (cv. Nipponbare) were grown at 350 µmol mol−1CO2 (ambient) in three chambers, or at 650 µmol mol−1 (elevated) in the other three chambers. Canopy net photosynthesis and night-time respiration were determined in the chambers by mass balance. Both canopy gross photosynthesis and total respiration, through the entire growing season, were increased by the CO2 enrichment. But CO2-induced variations in canopy carbon gain were mainly caused by changes in canopy photosynthesis. The enhancement of daily canopy gross photosynthesis by elevated CO2 was 33.4\% for the first 3 week, but it declined gradually and disappeared by heading. Enhancement of daily net carbon gain also decreased as rice plants grew. These results show that the increase in rice biomass by elevated CO2 results more from the increase in carbon gain at early rather than later stages of growth.
@article{citeulike:12851123,
abstract = {{* • Season-long effects of elevated CO2 concentration ([CO2]) on the carbon balance of the rice (Oryza sativa) canopy are reported here. The experiment was conducted in six sunlit, semiclosed growth chambers for an entire growing season. Rice plants (cv. Nipponbare) were grown at 350 µmol mol−1[CO2] (ambient) in three chambers, or at 650 µmol mol−1 (elevated) in the other three chambers. Canopy net photosynthesis and night-time respiration were determined in the chambers by mass balance. Both canopy gross photosynthesis and total respiration, through the entire growing season, were increased by the CO2 enrichment. But CO2-induced variations in canopy carbon gain were mainly caused by changes in canopy photosynthesis. The enhancement of daily canopy gross photosynthesis by elevated [CO2] was 33.4\% for the first 3 week, but it declined gradually and disappeared by heading. Enhancement of daily net carbon gain also decreased as rice plants grew. These results show that the increase in rice biomass by elevated [CO2] results more from the increase in carbon gain at early rather than later stages of growth.}},
added-at = {2019-03-31T01:14:40.000+0100},
author = {Sakai, Hidemitsu and Yagi, Kazuyuki and Kobayashi, Kazuhiko and Kawashima, Shigeto},
biburl = {https://www.bibsonomy.org/bibtex/2277ab5fbe3e3f1e3213efe747cf8c3ed/dianella},
citeulike-article-id = {12851123},
citeulike-linkout-0 = {http://dx.doi.org/10.1046/j.1469-8137.2001.00105.x},
day = 1,
doi = {10.1046/j.1469-8137.2001.00105.x},
interhash = {c1afe5edb53f07060efe09084c5e58a8},
intrahash = {277ab5fbe3e3f1e3213efe747cf8c3ed},
journal = {New Phytologist},
keywords = {chamber, citeulikeExport co2, face, photosynthesis, respiration, rice},
month = may,
number = 2,
pages = {241--249},
posted-at = {2013-12-17 20:35:16},
priority = {1},
publisher = {Blackwell Science Ltd},
timestamp = {2019-03-31T01:16:26.000+0100},
title = {{Rice carbon balance under elevated CO2}},
url = {http://dx.doi.org/10.1046/j.1469-8137.2001.00105.x},
volume = 150,
year = 2001
}