生态与农村环境学报 ›› 2019, Vol. 35 ›› Issue (11): 1468-1474.doi: 10.19741/j.issn.1673-4831.2019.0200

• 污染控制与修复 • 上一篇    下一篇

钒在不同品种玉米中的积累和化学形态特征

侯明1,2, 杨心瀚1,2, 赵菲菲1,2, 霍岩1,2   

  1. 1. 桂林理工大学化学与生物工程学院, 广西 桂林 541004;
    2. 广西高校食品安全与检测重点实验室, 广西 桂林 541004
  • 收稿日期:2019-03-29 发布日期:2019-11-19
  • 通讯作者: 侯明 E-mail:glhou@glut.edu.cn
  • 作者简介:侯明(1957-),女,山东济宁人,教授,博士,主要研究方向为重金属污染控制和生态毒理。E-mail:glhou@glut.edu.cn
  • 基金资助:
    国家自然科学基金(41561077)

Accumulation and Chemical Forms of Vanadium in Seedlings of Different Maize Varieties

HOU Ming1,2, YANG Xin-han1,2, ZHAO Fei-fei1,2, HUO Yan1,2   

  1. 1. College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China;
    2. Key Laboratory of Food Safety and Detection of Guangxi Colleges and Universities, Guilin 541004, China
  • Received:2019-03-29 Published:2019-11-19

摘要: 通过盆栽试验,研究了钒(V)胁迫下2个甜玉米(Zea mays)品种幼苗中V的积累和化学形态。结果表明:不同品种玉米幼苗中V含量分布均表现为根部远大于茎叶部,玉米幼苗根部富集的V较多。美甜糯八号根部V含量占总量的83.91%~89.09%,益甜608根部V含量占总量的84.59%~92.33%。不同品种玉米茎叶中V化学形态以乙醇提取态(FE)为主;但在根部,美甜糯八号和益甜608分别以盐酸提取态(FHCl)和残渣态(FR)为主,表明美甜糯八号玉米幼苗根中V多为活性较低的有机酸盐、果胶酸盐和蛋白质结合态,而益甜608则以难溶于水的重金属磷酸盐或草酸盐沉积在根部,这就避免了过量V从根部转运到茎叶,减轻了V对玉米幼苗的毒害。益甜608对V的耐性较强。该研究结果可为探讨甜玉米幼苗对V的吸收和耐性机制提供理论依据。

关键词: 玉米, 钒(V), 积累, 化学形态

Abstract: The accumulation and chemical forms of vanadium (V) in the seedlings of two sweet maize (Zea mays) cultivars under V stress were investigated by pot experiment. The results show that the distribution of V content in two sweet maize cultivars was much higher in roots than in shoots, more V enriched by the roots of maize seedlings. The V content of the roots of Meitiannuo No.8 accounted for 83.91%-89.09% of the total, and Yitian 608 was for 84.59%-92.33%. Among the stems and leaves of different maize varieties, the chemical form of V is mainly ethanol extracted (FE), but V speciation were mainly in the chemical forms of HCl extractable (FHCl) and residue state (FR) in roots, respectively. It indicates that V in the roots of Meitiannuo 8 maize was mostly less active organic acid salt, pectin acid salt and protein binding state, while V in Yitian 608 maize was deposited at the root with heavy metal phosphate or oxalate, which is hardly soluble in water, avoiding the ability of excessive V to transfer from the roots to the shoots, reducing the toxicity of V to maize seedlings. Yitian 608 is more resistant to V. The results provide a theoretical basis for exploring the absorption and tolerance mechanism of sweet maize seedlings to V.

Key words: maize (Zea mays), vanadium, accumulation, chemical form

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