2021年12月
Maintaining higher leaf photosynthesis after heading stage could promote biomass accumulation in rice
Scientific Reports
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- 巻
- 11
- 号
- 1
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/s41598-021-86983-9
- 出版者・発行元
- Springer Science and Business Media LLC
<title>Abstract</title>Leaf photosynthetic rate changes across the growing season as crop plants age. Most studies of leaf photosynthesis focus on a specific growth stage, leaving the question of which pattern of photosynthetic dynamics maximizes crop productivity unanswered. Here we obtained high-frequency data of canopy leaf CO2 assimilation rate (<italic>A</italic>) of two elite rice (<italic>Oryza sativa</italic>) cultivars and 76 inbred lines across the whole growing season. The integrated <italic>A</italic> value after heading was positively associated with crop growth rate (CGR) from heading to harvest, but that before heading was not. A curve-smoothing analysis of <italic>A</italic> after heading showed that accumulated <italic>A</italic> at > 80% of its maximum (<italic>A</italic>80) was positively correlated with CGR in analyses of all lines mixed and of lines grouped by genetic background, while the maximum <italic>A</italic> and accumulated <italic>A</italic> at ≤ 80% were less strongly correlated with CGR. We also found a genomic region (~ 12.2 Mb) that may enhance both <italic>A</italic>80 and aboveground biomass at harvest. We propose that maintaining a high <italic>A</italic> after heading, rather than having high maximum <italic>A</italic>, is a potential target for enhancing rice biomass accumulation.
- リンク情報
- ID情報
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- DOI : 10.1038/s41598-021-86983-9
- eISSN : 2045-2322