| Response of rice (oryza sativa) with root surface iron plaque under aluminium stress | |
| Chen, Rong Fu; Shen, Ren Fang; Gu, Pei; Dong, Xiao Ying; Du, Chang Wen; Ma, Jian Feng | |
| 刊名 | Annals of botany
 |
| 2006-08-01 | |
| 卷号 | 98期号:2页码:389-395 |
| 关键词 | Rice (oryza sativa) Formation of iron plaque Root surface Fe(ii)-edta Aluminium (a1) stress Citrate secretion Dcb (dithionite-citrate-bicarbonate) Root tip A1 translocation |
| ISSN号 | 0305-7364 |
| DOI | 10.1093/aob/mcl110 |
| 通讯作者 | Shen, ren fang(rfshen@issas.ac.cn) |
| 英文摘要 | Background and aims rice (oryza sativa) is an aquatic plant with a characteristic of forming iron plaque on its root surfaces. it is considered to be the most al-tolerant species among the cereal crops. the objective of this study was to determine the effects of root surface iron plaque on al translocation, accumulation and the change of physiological responses under al stress in rice in the presence of iron plaque. 9 methods the japonica variety rice, koshihikari, was used in this study and was grown hydroponically in a growth chamber. iron plaque was induced by exposing the rice roots to 30 mg l-1 ferrous iron either as fe(ii)-edta in nutrient solution (6 d, method i) or as feso4 in water solution (12 h, method ii). organic acid in root exudates was retained in the anion-exchange resin and eluted with 2m hcl, then analysed by high-performance liquid chromatography (hplc) after proper pre-treatment. fe and al in iron plaque were extracted with dcb (dithionite-citrate-bicarbonate) solution. key results and conclusions both methods (i and ii) could induce the formation of iron plaque on rice root surfaces. the amounts of dcb-extractable fe and al on root surfaces were much higher in the presence of iron plaque than in the absence of iron plaque. al contents in root tips were significantly decreased with iron plaque; translocation of at from roots to shoots was significantly reduced with iron plaque. al-induced secretion of citrate was observed and iron plaque could greatly depress this citrate secretion. these results suggested that iron plaque on rice root surfaces can be a sink to sequester al onto the root surfaces and fe ions can pre-saturate al-binding sites in root tips, which protects the rice root tips from suffering al stress to a certain extent. |
| WOS关键词 | PHRAGMITES-AUSTRALIS ; TYPHA-LATIFOLIA ; ARSENATE UPTAKE ; ORGANIC-ACIDS ; EXCESS COPPER ; TOLERANCE ; PLANTS ; PHOSPHORUS ; L. ; ACCUMULATION |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000239630500010 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2379135 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Shen, Ren Fang |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Okayama Univ, Bioresources Res Inst, Chuo Ku, Kurashiki, Okayama 7100046, Japan |
| 推荐引用方式 GB/T 7714 | Chen, Rong Fu,Shen, Ren Fang,Gu, Pei,et al. Response of rice (oryza sativa) with root surface iron plaque under aluminium stress[J]. Annals of botany,2006,98(2):389-395. |
| APA | Chen, Rong Fu,Shen, Ren Fang,Gu, Pei,Dong, Xiao Ying,Du, Chang Wen,&Ma, Jian Feng.(2006).Response of rice (oryza sativa) with root surface iron plaque under aluminium stress.Annals of botany,98(2),389-395. |
| MLA | Chen, Rong Fu,et al."Response of rice (oryza sativa) with root surface iron plaque under aluminium stress".Annals of botany 98.2(2006):389-395. |
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