Artigo

Soybean 'Tracajá' seedlings exposed to ozone under controlled conditions

The objective of this work was to assess initial growth, biomass production, gas exchange and antioxidative defenses of soybean 'Tracajá' seedlings, cultivated in the Amazonian region, exposed to ozone under controlled conditions. Seeds germinated in pots were placed in two chambers, one with filter...

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Autor principal: Bulbovas, Patrícia
Outros Autores: Souza, S?lvia Ribeiro de, Moraes, Regina Maria, Luizão, Flávio Jesus, Artaxo, Paulo
Grau: Artigo
Idioma: pt_BR
Publicado em: Pesquisa Agropecuaria Brasileira 2020
Assuntos:
Glycine Max
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/15102
id oai:repositorio:1-15102
recordtype dspace
spelling oai:repositorio:1-15102 Soybean 'Tracajá' seedlings exposed to ozone under controlled conditions Plântulas de soja 'Tracajá' expostas ao ozônio sob condições controladas Bulbovas, Patrícia Souza, S?lvia Ribeiro de Moraes, Regina Maria Luizão, Flávio Jesus Artaxo, Paulo Glycine Max The objective of this work was to assess initial growth, biomass production, gas exchange and antioxidative defenses of soybean 'Tracajá' seedlings, cultivated in the Amazonian region, exposed to ozone under controlled conditions. Seeds germinated in pots were placed in two chambers, one with filtered air (AF) and other with filtered air plus 30 ppb of ozone (AF + O 3). At 10 and 20 days after sowing, gas exchange, growth and biomass were measured; at 20 days after sowing, antioxidative defenses (ascorbic acid and superoxide dismutase) were analyzed. Net photosynthesis, stomatal conductance, transpiration rate, height, leaf area and biomass were 16, 27, 11, 22, 29 and 18% smaller, respectively, in AF + O3 at 10 days after sowing. At 20 days after sowing, besides this parameters, root length, stem diameter and root:shoot ratio were 10, 15 and 12% smaller, respectively, although ascorbic acid concentrations and superoxide dismutase activity increased. Soybean 'Tracajá' seedlings have low tolerance to concentration of 30 ppb of ozone. 2020-05-07T14:06:13Z 2020-05-07T14:06:13Z 2007 Artigo https://repositorio.inpa.gov.br/handle/1/15102 10.1590/S0100-204X2007000500005 pt_BR Volume 42, Número 5, Pags. 641-646 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Pesquisa Agropecuaria Brasileira
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language pt_BR
topic Glycine Max
spellingShingle Glycine Max
Bulbovas, Patrícia
Soybean 'Tracajá' seedlings exposed to ozone under controlled conditions
topic_facet Glycine Max
description The objective of this work was to assess initial growth, biomass production, gas exchange and antioxidative defenses of soybean 'Tracajá' seedlings, cultivated in the Amazonian region, exposed to ozone under controlled conditions. Seeds germinated in pots were placed in two chambers, one with filtered air (AF) and other with filtered air plus 30 ppb of ozone (AF + O 3). At 10 and 20 days after sowing, gas exchange, growth and biomass were measured; at 20 days after sowing, antioxidative defenses (ascorbic acid and superoxide dismutase) were analyzed. Net photosynthesis, stomatal conductance, transpiration rate, height, leaf area and biomass were 16, 27, 11, 22, 29 and 18% smaller, respectively, in AF + O3 at 10 days after sowing. At 20 days after sowing, besides this parameters, root length, stem diameter and root:shoot ratio were 10, 15 and 12% smaller, respectively, although ascorbic acid concentrations and superoxide dismutase activity increased. Soybean 'Tracajá' seedlings have low tolerance to concentration of 30 ppb of ozone.
format Artigo
author Bulbovas, Patrícia
author2 Souza, S?lvia Ribeiro de
Moraes, Regina Maria
Luizão, Flávio Jesus
Artaxo, Paulo
author2Str Souza, S?lvia Ribeiro de
Moraes, Regina Maria
Luizão, Flávio Jesus
Artaxo, Paulo
title Soybean 'Tracajá' seedlings exposed to ozone under controlled conditions
title_short Soybean 'Tracajá' seedlings exposed to ozone under controlled conditions
title_full Soybean 'Tracajá' seedlings exposed to ozone under controlled conditions
title_fullStr Soybean 'Tracajá' seedlings exposed to ozone under controlled conditions
title_full_unstemmed Soybean 'Tracajá' seedlings exposed to ozone under controlled conditions
title_sort soybean 'tracajá' seedlings exposed to ozone under controlled conditions
publisher Pesquisa Agropecuaria Brasileira
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/15102
_version_ 1787141304448188416
score 11.755432

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