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Efficient acquisition of iron confers greater tolerance to saline-alkaline stress in rice (Oryza sativa L.) | |
Li, Qian; Yang, An; Zhang, Wen-Hao | |
2016 | |
发表期刊 | JOURNAL OF EXPERIMENTAL BOTANY |
ISSN | 0022-0957 |
卷号 | 67期号:22页码:6431-6444 |
摘要 | To elucidate the mechanisms underlying tolerance to saline-alkaline stress in two rice genotypes, Dongdao-4 and Jigeng-88, we exposed them to medium supplemented with 10 mM Na2CO3 and 40 mM NaCl (pH 8.5). Dongdao-4 plants displayed higher biomass, chlorophyll content, and photosynthetic rates, and a larger root system than Jigeng-88 under saline-alkaline conditions. Dongdao-4 had a higher shoot Na+/K+ ratio than Jigeng-88 under both control and saline-alkaline conditions. Dongdao-4 exhibited stronger rhizospheric acidification than Jigeng-88 under saline-alkaline conditions, resulting from greater up-regulation of H+-ATPases at the transcriptional level. Moreover, Fe concentrations in shoots and roots of Dongdao-4 were higher than those in Jigeng-88, and a higher rate of phytosiderophore exudation was detected in Dongdao-4 versus Jigeng-88 under saline-alkaline conditions. The Fe-deficiency-responsive genes OsIRO2, OsIRT1, OsNAS1, OsNAS2, OsYSL2, and OsYSL15 were more strongly up-regulated in Dongdao-4 than Jigeng-88 plants in saline-alkaline medium, implying greater tolerance of Dongdao-4 plants to Fe deficiency. To test this hypothesis, we compared the effects of Fe deficiency on the two genotypes, and found that Dongdao-4 was more tolerant to Fe deficiency. Exposure to Fe-deficient medium led to greater rhizospheric acidification and phytosiderophore exudation in Dongdao-4 than Jigeng-88 plants. Expression levels of OsIRO2, OsIRT1, OsNAS1, OsNAS2, OsYSL2, and OsYSL15 were higher in Dongdao-4 than Jigeng-88 plants under Fe-deficient conditions. These results demonstrate that a highly efficient Fe acquisition system together with a large root system may underpin the greater tolerance of Dongdao-4 plants to saline-alkaline stress. |
关键词 | Dongdao-4 iron acquisition iron deficiency Jigeng-88 Oryza sativa rice saline-alkaline stress |
学科领域 | Plant Sciences |
DOI | 10.1093/jxb/erw407 |
收录类别 | SCI |
语种 | 英语 |
WOS关键词 | FERRIC-CHELATE REDUCTASE ; NICOTIANAMINE SYNTHASE GENES ; VACUOLAR NA+/H+ ANTIPORTER ; SALT TOLERANCE ; ION BALANCE ; FE-DEFICIENCY ; PHYSIOLOGICAL-RESPONSES ; PUCCINELLIA-TENUIFLORA ; GROWTH ; BICARBONATE |
WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
WOS记录号 | WOS:000397126300015 |
出版者 | OXFORD UNIV PRESS |
文献子类 | Article |
出版地 | OXFORD |
EISSN | 1460-2431 |
资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31301832] ; Chinese Academy of SciencesChinese Academy of Sciences [XDA08010401] |
作者邮箱 | whzhang@ibcas.ac.cn |
作品OA属性 | Green Submitted, Green Published, hybrid |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/25128 |
专题 | 植被与环境变化国家重点实验室 |
作者单位 | 1.[Li, Qian 2.Yang, An 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Beijing Inst Life Sci, Res Network Global Change Biol, Beijing 100093, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Qian,Yang, An,Zhang, Wen-Hao. Efficient acquisition of iron confers greater tolerance to saline-alkaline stress in rice (Oryza sativa L.)[J]. JOURNAL OF EXPERIMENTAL BOTANY,2016,67(22):6431-6444. |
APA | Li, Qian,Yang, An,&Zhang, Wen-Hao.(2016).Efficient acquisition of iron confers greater tolerance to saline-alkaline stress in rice (Oryza sativa L.).JOURNAL OF EXPERIMENTAL BOTANY,67(22),6431-6444. |
MLA | Li, Qian,et al."Efficient acquisition of iron confers greater tolerance to saline-alkaline stress in rice (Oryza sativa L.)".JOURNAL OF EXPERIMENTAL BOTANY 67.22(2016):6431-6444. |
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