| Grain-filling problem in 'super' rice. | |
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MedLine Citation:
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PMID: 19959608 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Modern rice (Oryza sativa L.) cultivars, especially the newly bred 'super' rice, have numerous spikelets on a panicle with a large yield capacity. However, these cultivars often fail to achieve their high yield potential due to poor grain-filling of later-flowering inferior spikelets (in contrast to the earlier-flowering superior spikelets). Conventional thinking to explain the poor grain-filling is the consequence of carbon limitation. Recent studies, however, have shown that carbohydrate supply should not be the major problem because they have adequate sucrose at their initial grain-filling stage. The low activities of key enzymes in carbon metabolism may contribute to the poor grain-filling. Proper field practices, such as moderate soil drying during mid- and late grain-filling stages, could solve some problems in poor grain-filling. Further studies are needed by molecular approaches to investigate the signal transport, the hormonal action, the gene expressions, and the biochemical processes in inferior spikelets. |
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Authors:
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Jianchang Yang; Jianhua Zhang |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of experimental botany Volume: 61 ISSN: 1460-2431 ISO Abbreviation: J. Exp. Bot. Publication Date: 2010 |
Date Detail:
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Created Date: 2009-12-16 Completed Date: 2010-03-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882906 Medline TA: J Exp Bot Country: England |
Other Details:
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Languages: eng Pagination: 1-5 Citation Subset: IM |
Affiliation:
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Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou, Jiangsu, China. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Carbohydrate Metabolism Flowers / physiology Organ Size Oryza sativa / growth & development* Seeds / growth & development* Soil Solubility |
| Chemical | |
Reg. No./Substance:
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0/Soil |
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