首页> 外文期刊>Marine pollution bulletin >Short-term cadmium exposure induces gas exchanges, morphological and ultrastructural disturbances in mangrove Aviceunia schaueriana young plants
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Short-term cadmium exposure induces gas exchanges, morphological and ultrastructural disturbances in mangrove Aviceunia schaueriana young plants

机译:短期接触镉会导致红树林Aviceunia schaueriana年幼植物中的气体交换,形态和超微结构扰动

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摘要

Mangroves have been subject to more metal contamination, including cadmium (Cd). This study evaluated if a relatively short Cd exposure may induce metabolic, morphological and ultrastructural cell disturbance in Avicennia schaueriana. Cd induced evident constraints to seedlings since there was reduction in leaf gas exchanges and the plants did not survive for more than 10 days at a higher Cd exposure in controlled conditions. The highest Cd accumulation was observed in roots and gradually less in stem and leaves. Cadmium induced lignin deposition was observed in xylem cells of all vegetative organs. Intense sclerification in xylem cells, endoderm and change in the hypoderm organization were also detected. Cadmium clearly induced chloroplast deformities with ruptures of its membranes, thylakoids and core and provoked cytoplasm disorganization. These metal constraints under natural conditions for long term can lead to the accumulation of cellular and metabolic damages and jeopardize seedlings establishment and local biodiversity.
机译:红树林遭受了更多金属污染,包括镉(Cd)。这项研究评估了较短的Cd暴露量是否可能导致schavieriana的代谢,形态和超微结构细胞紊乱。 Cd诱导了对幼苗的明显限制,因为叶片气体交换减少,并且在受控条件下较高的Cd暴露条件下,植物无法存活超过10天。在根部观察到最高的Cd积累,而在茎和叶中则逐渐减少。在所有营养器官的木质部细胞中观察到镉诱导的木质素沉积。还检测到木质部细胞的强烈硬化,内胚层和皮下组织的变化。镉明显引起叶绿体畸形,其膜,类囊体和核心破裂,引起细胞质紊乱。长期处于自然条件下的这些金属限制会导致细胞和代谢损伤的积累,并危害幼苗的生长和当地的生物多样性。

著录项

  • 来源
    《Marine pollution bulletin》 |2018年第6期|122-129|共8页
  • 作者单位

    Univ Estadual Santa Cruz, Dept Ciencias Biol, Rodovia Jorge Amado,Km 16, BR-45662900 Ilheus, Brazil;

    Univ Estadual Santa Cruz, Dept Ciencias Biol, Rodovia Jorge Amado,Km 16, BR-45662900 Ilheus, Brazil;

    Univ Estadual Santa Cruz, Dept Ciencias Biol, Rodovia Jorge Amado,Km 16, BR-45662900 Ilheus, Brazil;

    Univ Fed Minas Gerais, Dept Quim, Inst Ciencias Exatas, Av Antonio Carlos, BR-31270901 Belo Horizonte, MG, Brazil;

    Univ Estadual Santa Cruz, Dept Ciencias Biol, Rodovia Jorge Amado,Km 16, BR-45662900 Ilheus, Brazil;

    Univ Fed Minas Gerais, Dept Bot, Inst Ciancias Biol, 6627 Av Antonio Carlos, BR-31270901 Belo Horizonte, MG, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Acantathaceae; Mangrove; Photosynthesis; Trace metals; Ultrastructure;

    机译:科;红树林;光合作用;痕量金属;超微结构;

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