Enhanced accumulation of gibberellins rendered rice seedlings sensitive to ammonium toxicity
文献类型：期刊论文
| 作者 | Wang, Baolan; Wei, Haifang1; Zhang, Hui3; Zhang, Wen-Hao
|
| 刊名 | JOURNAL OF EXPERIMENTAL BOTANY
 |
| 出版日期 | 2020 |
| 卷号 | 71期号:4页码:1514-1526 |
| 关键词 | Ammonium toxicity gibberellins nitrate polyamines putrescine rice (Oryza sativa L.) |
| ISSN号 | 0022-0957 |
| DOI | 10.1093/jxb/erz492 |
| 文献子类 | Article |
| 英文摘要 | Ammonium (NH4+) phytotoxicity is a worldwide phenomenon, but the primary toxic mechanisms are still controversial. In the present study, we investigated the physiological function of gibberellins (GAs) in the response of rice plants to NH4+ toxicity and polyamine accumulation using GA biosynthesis-related rice mutants. Exposure to NH4+ significantly decreased GA(4) production in shoots of wild-type (WT) plants. Both exogenous GA application to the WT and increases in endogenous GA levels in eui1 mutants rendered them more sensitive to NH4+ toxicity. In contrast, growth of sd1 GA-deficient mutants was more tolerant to NH4+ toxicity than that of their WT counterparts. The role of polyamines in GA-mediated NH4+ toxicity was evaluated using WT rice plants and their GA-related mutants. The eui1 mutants with GA overproduction displayed a higher endogenous putrescine (Put) accumulation than WT plants, leading to an enhanced Put/[spermidine (Spd)+spermine (Spm)] ratio in their shoots. In contrast, mutation of the SD1 gene encoding a defective enzyme in GA biosynthesis resulted in a significant increase in Spd and Spm production, and reduction in the Put/(Spd+Spm) ratio when exposed to a high NH4+ medium. Exogenous application of Put exacerbated symptoms associated with NH4+ toxicity in rice shoots, while the symptoms were alleviated by an inhibitor of Put biosynthesis. These findings highlight the involvement of GAs in NH4+ toxicity, and that GA-induced Put accumulation is responsible for the increased sensitivity to NH4+ toxicity in rice plants. |
| 学科主题 | Plant Sciences |
| 出版地 | OXFORD |
| 电子版国际标准刊号 | 1460-2431 |
| WOS关键词 | GREEN-REVOLUTION ; STRESS TOLERANCE ; CYTOCHROME-P450 MONOOXYGENASE ; PUTRESCINE ACCUMULATION ; ETHYLENE PRODUCTION ; NITRATE ; POLYAMINES ; METABOLISM ; QUANTIFICATION ; TRANSLOCATION |
| WOS研究方向 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000518530400027 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31672227] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/21876]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Baolan,Wei, Haifang,Zhang, Hui,et al. Enhanced accumulation of gibberellins rendered rice seedlings sensitive to ammonium toxicity[J]. JOURNAL OF EXPERIMENTAL BOTANY,2020,71(4):1514-1526. |
| APA | Wang, Baolan,Wei, Haifang,Zhang, Hui,&Zhang, Wen-Hao.(2020).Enhanced accumulation of gibberellins rendered rice seedlings sensitive to ammonium toxicity.JOURNAL OF EXPERIMENTAL BOTANY,71(4),1514-1526. |
| MLA | Wang, Baolan,et al."Enhanced accumulation of gibberellins rendered rice seedlings sensitive to ammonium toxicity".JOURNAL OF EXPERIMENTAL BOTANY 71.4(2020):1514-1526. |
入库方式： OAI收割
来源：植物研究所
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