2013年10月
The Long-Term Changes in Midday Photoinhibition in Rice (Oryza sativa L.) Growing under fluctuating Soil Water Conditions
PLANT PRODUCTION SCIENCE
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- 巻
- 16
- 号
- 4
- 開始ページ
- 287
- 終了ページ
- 294
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1626/pps.16.287
- 出版者・発行元
- CROP SCIENCE SOC JAPAN
Rice crops growing under fluctuating soil water conditions in a rainfed field frequently experience severe photoinhibition at midday, potentially decreasing their biomass production. In this study, the long-term changes in midday photoinhibition in five rice cultivars growing under variable soil water conditions in a rainfed field were evaluated by determining the maximum quantum yield of photosystem II (F-v/F-m). F-v/F-m was generally lower under rainfed conditions than under flooded conditions at 65 - 75 days after sowing (DAS), but was similar under both conditions at 109 - 124 DAS. This mitigation of photoinhibition over time is likely an up-regulation of mechanisms to dissipate excess electrons, and an analysis of covariance showed that the degree of mitigation under the rainfed condition varied among the cultivars. Such genotypic differences in the long-term changes in F-v/F-m might be determined by the capacity of the cultivar to adapt to drought conditions.
- リンク情報
- ID情報
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- DOI : 10.1626/pps.16.287
- ISSN : 1343-943X
- eISSN : 1349-1008
- Web of Science ID : WOS:000329011600001