西南农业学报2025，Vol.38Issue(7)：1435-1443,9.DOI:10.16213/j.cnki.scjas.2025.7.008
不同籼稻品种对总砷和无机砷转运积累特征研究
Characterization of total and inorganic arsenic translocation and accumulation by different indica hybrid rice cultivars
摘要
Abstract
[Objective]The present study aimed to compare arsenic(As)accumulation in different organs among indica hybrid rice cultivars,screen low-As cultivars for practical production,and investigate the differences in translocation and accumulation of inorganic As species,thereby providing a scientific basis for safe rice production in As-contaminated fields.[Method]A field trial was conducted in 2022 in an As-contaminated agricultural area in Liling,Hunan province,using eight indica hybrid rice cultivars.The LSD multiple comparison method was employed to analyze inter-cultivar differences in As accumulation.Multi-organ translocation coefficients were calculated to quantify As translo-cation pathways,and correlation analysis was used to identify key nodes affecting grain As accumulation.[Result]As concentrations in roots,shoots,husks and brown rice were determined.The shoot As content of Quanyou 737(QY737)was significantly higher than that of other cul-tivars,while Jingliangyou 534(JLY534)exhibited the lowest brown rice As content,and Shenyou 9586(SY9586)showed the highest.Anal-ysis of As distribution in shoot organs(stems,stem nodes,leaves and leaf sheaths)revealed that QY737 had significantly higher As concen-trations in stem node Ⅲ(J3),stem node Ⅳ(J4),stem Ⅰ(S1),stem Ⅱ(S2),stem Ⅲ(S3),leaf Ⅲ(L3),leaf sheath Ⅰ(E1)and leaf sheath Ⅱ(E2)compared to JLY534.QY737 also showed higher As levels in J3,J4,S1,S3,E1 and E2 than SY9586.Translocation coeffi-cients and correlation analysis identified stem node Ⅱ(J2),J4,S2,S3 and leaf Ⅰ(L1)as key organs influencing As accumulation.The translocation process from stem Ⅱ(J2)to S2 was critical for As distribution.Speciation analysis indicated that inorganic As,dominated by arsenate[As(Ⅴ)],was distributed across all organs,while organic As,primarily dimethylarsinic acid(DMA),accumulated mainly in leaves,with negligible levels in stems and stem nodes.[Conclusion]QY737,with its high shoot As content,is ideal for phytoremediation in As-con-taminated areas,whereas JLY534,with low brown rice As content,is suitable for safe grain production.The distribution and grain accumula-tion of As in indica hybrid rice are significantly regulated by specific organs(J2,J4,S2,S3 and L1)and the J2-to-S2 translocation process.These findings provide a scientific foundation for breeding low-As indica hybrid rice cultivars.关键词
砷/水稻/转运系数/茎节/砷形态Key words
Arsenic/Rice/Transporter/Stem node/Arsenic morphology分类
农业科技引用本文复制引用
薛昊波,雷东阳,柏斌,罗秋红,姚栋萍,刘宇,牟保辉,陈哲,孟芙碟,庞旭桐,吴俊..不同籼稻品种对总砷和无机砷转运积累特征研究[J].西南农业学报,2025,38(7):1435-1443,9.基金项目
国家重点研发计划资助项目(2023YFD1703000、2022YFD1700103) （2023YFD1703000、2022YFD1700103）
长沙市杰出创新青年培养项目(kq2209025) （kq2209025）
