Differential ozone sensitivity of rice cultivars as indicated by visible injury and grain yield
Sawada, H; Kohno, Y
HERO ID
199426
Reference Type
Journal Article
Year
2009
Language
English
PMID
| HERO ID | 199426 |
|---|---|
| In Press | No |
| Year | 2009 |
| Title | Differential ozone sensitivity of rice cultivars as indicated by visible injury and grain yield |
| Authors | Sawada, H; Kohno, Y |
| Journal | Plant Biology |
| Volume | 11 |
| Page Numbers | 70-75 |
| Abstract | Surface ozone pollution may cause reductions in rice (Oryza sativa L.) yield. Ozone sensitivity in rice cultivars is often evaluated based on visible leaf injury at an early growth stage. However, it is not clear whether reduction in grain yield is related to visible injury. Therefore, visible damage and grain yield reduction were examined in Japanese and Asian rice cultivars exposed to ozone. In experiment 1, 3-week-old rice seedlings were exposed to ozone (min.: 20 nl center dot l-1, max.:120 nl center dot l-1) for 12 h in open-top chambers (OTCs). Visible leaf injury was quantified according to a leaf bronzing score. In experiment 2, rice plants were exposed to ozone in OTCs throughout the cropping season until grain harvest. Daily mean ozone concentrations were maintained at 2, 23, 28, 42, and 57 nl center dot l-1 with a regular diurnal pattern of exposure. After harvest, grain yield was determined. Based on visible injury to the uppermost fully expanded leaf, the indica cultivar 'Kasalath' was most tolerant, and the japonica cultivar 'Kirara 397' was most sensitive to ozone. However, grain yields for both 'Kasalath' and 'Kirara 397' were significantly decreased after ozone exposure. The indica cultivar 'Jothi' suffered severe injury after ozone exposure but had no reduction in grain yield. Therefore, ozone sensitivity of rice cultivars evaluated by visible injury did not coincide with that evaluated by the reductions in grain yield. These results suggest that mechanisms that induce acute leaf injury do not relate to chronic ozone toxicity that reduces yield. |
| Doi | 10.1111/j.1438-8677.2009.00233.x |
| Pmid | 19778370 |
| Wosid | WOS:000270153300008 |
| Url | http://doi.wiley.com/10.1111/j.1438-8677.2009.00233.x |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | N1-NovN1-Differential ozone sensitivity of rice cultivars as indicated by visible injury and grain yieldN1-ISI:000270153300008N1-Sawada, H. Kohno, Y.Suppl. 1AD-[Sawada, H.; Kohno, Y.] Cent Res Inst Elect Power Ind, Environm Sci Res Lab, Chiba 2701194, Japan.Sawada, H, Cent Res Inst Elect Power Ind, Environm Sci Res Lab, Chiba 2701194, Japan.hiroko-s@criepi.denken.or.jp |
| Is Public | Yes |
| Language Text | English |
| Keyword | Grain yield; ozone; rice; visible leaf injury; SURFACE OZONE; GROWTH; CHINA; MECHANISMS; RESPONSES; STRESS; IMPACT |
| Is Qa | No |
| Relationship(s) |
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