Morphology, ultrastructure and mineral uptake is affected by copper toxicity in young plants of Inga subnuda subs. luschnathiana (Benth.) T.D. Penn

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• 作者：Tielle Abreu de Freitas…
• 关键词：Cu accumulation ; Heavy metal ; Cu localization ; Ultrastructural changes
• 刊名：Environmental Science and Pollution Research
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：22
• 期：20
• 页码：15479-15494
• 全文大小：4,028 KB
• 参考文献：ABRABI (2003) http://?www.?abrabi.?org.?br/?planta-transgenica.?htm . Acesso em: 03 Mar 2013
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• 作者单位：Tielle Abreu de Freitas (1)
  Marcel Giovanni Costa Fran?a (4)
  Alex-Alan Furtado de Almeida (1)
  Sérgio José Ribeiro de Oliveira (2)
  Raildo Mota de Jesus (2)
  Vania Lima Souza (3)
  José Victor dos Santos Silva (1)
  Pedro Ant?nio Mangabeira (1)
  
  1. Department of Biological Science, Santa Cruz State University, Km 16, Rodovia Jorge Amado, Ilhéus, BA, 45.662-000, Brazil
  4. Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
  2. Department of Technology Science and Department of Agrarian Science and Environment, Ilhéus, BA, 45.662-000, Brazil
  3. Bahia Federal Institute of Education, Science and Technology, Irecê, BA, Brazil
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

Toxic effects of copper (Cu) were analyzed in young plants of Inga subnuda subs. luschnathiana, a species that is highly tolerant to flooding and found in Brazil in wetlands contaminated with Cu. Plants were cultivated in fully nutritive solution, containing different concentrations of Cu (from 0.08 μmol to 0.47 mmol L?). Symptoms of Cu toxicity were observed in both leaves and roots of plants cultivated from 0.16 mmol Cu L?. In the leaves, Cu clearly induced alterations in the thickness of the epidermis, mesophyll, palisade parenchyma, and intercellular space of the lacunose parenchyma. Also, this metal induced disorganization in thylakoid membranes, internal and external membrane rupture in chloroplasts, mitochondrial alterations, and electrodense material deposition in vacuoles of the parenchyma and cell walls. The starch grains disappeared; however, an increase of plastoglobule numbers was observed according to Cu toxicity. In the roots, destruction of the epidermis, reduction of the intercellular space, and modifications in the format of initial cells of the external cortex were evident. Cell walls and endoderm had been broken, invaginations of tonoplast and vacuole retractions were found, and, again, electrodense material was observed in these sites. Mineral nutrient analysis revealed higher Cu accumulation in the roots and greater macro- and micronutrients accumulation into shoots. Thus, root morphological and ultrastructural changes induced differential nutrients uptake and their translocations from root toward shoots, and this was related to membrane and endoderm ruptures caused by Cu toxicity. Keywords Cu accumulation Heavy metal Cu localization Ultrastructural changes