期刊
FIELD CROPS RESEARCH
卷 118, 期 2, 页码 194-198出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fcr.2010.04.013
关键词
Aerobic rice; Comair; Introgression lines; IR64; Upland rice; Water-saving technology
类别
资金
- Japan Society for the Promotion of Science [20780010]
- Grants-in-Aid for Scientific Research [20780010] Funding Source: KAKEN
Precise evaluation of root system architecture is important for understanding how rice plants are adapted to non-puddled and non-flooded conditions in aerobic culture. The objective of this study was to compare estimates of root length by the Comair root length scanner and a flat bed scanner and image analysis software in rice grown in aerobic, near-saturated and flooded fields. Fine roots (diameter < 0.2 mm) accounted for >80% of root length in all hydrological conditions. The Comair root length scanner detected fewer fine roots than the software; root length estimated by the Comair scanner was between that of roots wider than 0.1 mm and roots wider than 0.2 mm estimated by image analysis software. Importantly, total root length under aerobic and near-saturated conditions was 10-30% of that under flooding by image analysis software, but not by the Comair scanner. Digital image analysis detected genotypic differences in fine root development in the subsurface layer in aerobic culture that the Comair root length scanner would have missed. Although root length measurement by image analysis software is still under development, this new tool will facilitate the phenotyping of root system architecture and shed light on the roles of fine roots in water-saving rice cultivation. (C) 2010 Elsevier B.V. All rights reserved.
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