Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500009 |
Resumo: | The growth and developmental characteristics of grasses and their high biodiversity make such plants suitable for remediation of areas contaminated by heavy metals. Nevertheless, heavy metal toxic effect on the plants may cause alteration in their metabolic pathways, such as photosynthesis, respiration, and growth, modifying plant anatomy. This work aimed to evaluate the effect of levels of soil contamination (0, 7.5 % and 15 % m³ m-3) on biomass production, on photosynthetic characteristics and on anatomical changes in roots and leaves of brachiaria (Brachiaria decumbens Stapf.). After seeds were planted, seedlings were uprooted and replanted in vases containing soil at different contamination levels, being left to rest for 120 days. At the end of that time, plants presented reduced yield of root and shoot dry matter, contents of chlorophyll a, chlorophyll b, total chlorophyll and potential photosynthesis with increased of soil contamination. The cell layers of endodermis and exodermis in the root tissues and the cell walls of the xylem and cortical parenchyma all thickened as contamination increased. In the leaf tissues, the adaxial and abaxial epidermis presented increased thickness while the leaf blade presented reduced thickness as contamination increased with consequent change in the root growth rate. In general, the effects of heavy metal increased with the metal concentration. Some results indicate that B. decumbens seems to have some degree of heavy metal tolerance. |
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Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbenscontaminated soilchlorophyllgrowthpotencial photosynthesisThe growth and developmental characteristics of grasses and their high biodiversity make such plants suitable for remediation of areas contaminated by heavy metals. Nevertheless, heavy metal toxic effect on the plants may cause alteration in their metabolic pathways, such as photosynthesis, respiration, and growth, modifying plant anatomy. This work aimed to evaluate the effect of levels of soil contamination (0, 7.5 % and 15 % m³ m-3) on biomass production, on photosynthetic characteristics and on anatomical changes in roots and leaves of brachiaria (Brachiaria decumbens Stapf.). After seeds were planted, seedlings were uprooted and replanted in vases containing soil at different contamination levels, being left to rest for 120 days. At the end of that time, plants presented reduced yield of root and shoot dry matter, contents of chlorophyll a, chlorophyll b, total chlorophyll and potential photosynthesis with increased of soil contamination. The cell layers of endodermis and exodermis in the root tissues and the cell walls of the xylem and cortical parenchyma all thickened as contamination increased. In the leaf tissues, the adaxial and abaxial epidermis presented increased thickness while the leaf blade presented reduced thickness as contamination increased with consequent change in the root growth rate. In general, the effects of heavy metal increased with the metal concentration. Some results indicate that B. decumbens seems to have some degree of heavy metal tolerance.Escola Superior de Agricultura "Luiz de Queiroz"2011-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500009Scientia Agricola v.68 n.5 2011reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162011000500009info:eu-repo/semantics/openAccessGomes,Marcelo PedrosaMarques,Teresa Cristina Lara Lanza de Sá e MeloNogueira,Mariana de Oliveira GonçalvesCastro,Evaristo Mauro deSoares,Ângela Mariaeng2011-10-03T00:00:00Zoai:scielo:S0103-90162011000500009Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2011-10-03T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens |
title |
Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens |
spellingShingle |
Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens Gomes,Marcelo Pedrosa contaminated soil chlorophyll growth potencial photosynthesis |
title_short |
Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens |
title_full |
Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens |
title_fullStr |
Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens |
title_full_unstemmed |
Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens |
title_sort |
Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens |
author |
Gomes,Marcelo Pedrosa |
author_facet |
Gomes,Marcelo Pedrosa Marques,Teresa Cristina Lara Lanza de Sá e Melo Nogueira,Mariana de Oliveira Gonçalves Castro,Evaristo Mauro de Soares,Ângela Maria |
author_role |
author |
author2 |
Marques,Teresa Cristina Lara Lanza de Sá e Melo Nogueira,Mariana de Oliveira Gonçalves Castro,Evaristo Mauro de Soares,Ângela Maria |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Gomes,Marcelo Pedrosa Marques,Teresa Cristina Lara Lanza de Sá e Melo Nogueira,Mariana de Oliveira Gonçalves Castro,Evaristo Mauro de Soares,Ângela Maria |
dc.subject.por.fl_str_mv |
contaminated soil chlorophyll growth potencial photosynthesis |
topic |
contaminated soil chlorophyll growth potencial photosynthesis |
description |
The growth and developmental characteristics of grasses and their high biodiversity make such plants suitable for remediation of areas contaminated by heavy metals. Nevertheless, heavy metal toxic effect on the plants may cause alteration in their metabolic pathways, such as photosynthesis, respiration, and growth, modifying plant anatomy. This work aimed to evaluate the effect of levels of soil contamination (0, 7.5 % and 15 % m³ m-3) on biomass production, on photosynthetic characteristics and on anatomical changes in roots and leaves of brachiaria (Brachiaria decumbens Stapf.). After seeds were planted, seedlings were uprooted and replanted in vases containing soil at different contamination levels, being left to rest for 120 days. At the end of that time, plants presented reduced yield of root and shoot dry matter, contents of chlorophyll a, chlorophyll b, total chlorophyll and potential photosynthesis with increased of soil contamination. The cell layers of endodermis and exodermis in the root tissues and the cell walls of the xylem and cortical parenchyma all thickened as contamination increased. In the leaf tissues, the adaxial and abaxial epidermis presented increased thickness while the leaf blade presented reduced thickness as contamination increased with consequent change in the root growth rate. In general, the effects of heavy metal increased with the metal concentration. Some results indicate that B. decumbens seems to have some degree of heavy metal tolerance. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-10-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500009 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500009 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-90162011000500009 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.68 n.5 2011 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1748936462495121408 |