Effects of elevated [CO2] on stem and root lodging among rice cultivars
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- 作者：ChunWu Zhu (15640)
WeiGuo Cheng (25640)
Hidemitsu Sakai (15640)
Shimpei Oikawa (35640)
Rebecca C. Laza (45640)
Yasuhiro Usui (15640)
Toshihiro Hasegawa (15640) - 关键词：climate change ; cultivars ; lodging ; rice
- 刊名：Chinese Science Bulletin
- 出版年：2013
- 出版时间：May 2013
- 年：2013
- 卷：58
- 期：15
- 页码：1787-1794
- 全文大小：632KB
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WeiGuo Cheng (25640)
Hidemitsu Sakai (15640)
Shimpei Oikawa (35640)
Rebecca C. Laza (45640)
Yasuhiro Usui (15640)
Toshihiro Hasegawa (15640)
15640. National Institute for Agro-Environmental Sciences, Ibaraki, 305-8604, Japan
25640. Faculty of Agriculture, Yamagata University, Yamagata, 997-8555, Japan
35640. Faculty of International Agriculture and Food Studies, Tokyo University of Agriculture, Tokyo, 156-8502, Japan
45640. Crop and Environmental Sciences Division, International Rice Research Institute, DAPO Box 7777, Metro Manila, Philippines - ISSN：1861-9541
文摘
Studies showed that elevated [CO2] would improve photosynthetic rates and enhance yields of rice; however, few studies have focused on the response of rice lodging, which is a major cause of cereal yield loss and quality reduction, under elevated [CO2]. In this study, we examined the effects of elevated [CO2] on stem and root lodging using 4 rice cultivars (86Y8, japonica hybrid; LYP9, 2-line indica hybrid; variety 9311, type of indica inbred rice, and SY63, 3-line indica hybrid) grown under two [CO2] levels: 400 and 680 μmol mol?. Our results indicated that under elevated [CO2], the stem-lodging risk (SLR) of 9311 decreased, while in SY63 the SLR increased, 86Y8 and LYP9 were not significantly affected; the risk of root lodging was reduced for all cultivars, because root biomass (instead of root number) and bending strength were increased significantly, and then the increase of anti-lodging ability is far higher than that of self-weight mass moment for all cultivars. These findings suggested that higher [CO2] can enhance the risk of stem-lodging for cultivars with strong-[CO2]-responses, but may not aggravate the root lodging for all rice cultivars.