The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in eucalyptus young plants
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/26204 |
Resumo: | The symptoms of magnesium (Mg) deficiency have been well documented in crop plants. The relationship between sugar partitioning and Mg deficiency consists an important abiotic stress that may restrict root growth and limit the success of planting in the field. Despite of this, the primary physiological effects of low Mg availability remain largely unknown in eucalyptus. This paper aimed to investigate how the Mg deficiency affects biochemical aspects of sugar partitioning associated to dry matter accumulation in roots of young Eucalyptus urophylla plants. Experimental work was carried out at a greenhouse, arranged by completely randomized design, consisted by split plot 5x4, with five Mg concentrations (0, 25, 50, 75 and 100 % Mg levels of nutrient solution) and four times of evaluations – 15, 30, 50 and 120 days after planting (DAP). Soluble (SS) and reducing (RS) sugar contents, invertase and sucrose synthase activity and shoot and root dry matter weight were measured. Increased sugar concentrations, both SS and RS, were found in leaf tissues from 30 DAP. In root tissues, neither RS nor SS content showed differences between Mg deficiency and control. Significant differences were also not found neither in root dry matter accumulation, nor in shoot/root dry matter ratio. Mg deficiency did not affect sucrose cleaving in roots, which was predominantly catalyzed by acidic invertase, followed by susy and neutral invertase. We concluded that Eucalyptus urophylla is tolerant to Mg deficiency, since the sugar accumulation in leaf tissues is not enough to constrain dry matter accumulation in roots. |
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The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in eucalyptus young plantsOs efeitos da deficiência de magnésio na partição de açúcares não restringem o crescimento de raízes em plantas jovens de eucaliptoWoody plantsMineral nutritionAssimilate partitioningSource-sink systemPlantas lenhosasNutrição mineralPartição de assimiladosFonte-drenoThe symptoms of magnesium (Mg) deficiency have been well documented in crop plants. The relationship between sugar partitioning and Mg deficiency consists an important abiotic stress that may restrict root growth and limit the success of planting in the field. Despite of this, the primary physiological effects of low Mg availability remain largely unknown in eucalyptus. This paper aimed to investigate how the Mg deficiency affects biochemical aspects of sugar partitioning associated to dry matter accumulation in roots of young Eucalyptus urophylla plants. Experimental work was carried out at a greenhouse, arranged by completely randomized design, consisted by split plot 5x4, with five Mg concentrations (0, 25, 50, 75 and 100 % Mg levels of nutrient solution) and four times of evaluations – 15, 30, 50 and 120 days after planting (DAP). Soluble (SS) and reducing (RS) sugar contents, invertase and sucrose synthase activity and shoot and root dry matter weight were measured. Increased sugar concentrations, both SS and RS, were found in leaf tissues from 30 DAP. In root tissues, neither RS nor SS content showed differences between Mg deficiency and control. Significant differences were also not found neither in root dry matter accumulation, nor in shoot/root dry matter ratio. Mg deficiency did not affect sucrose cleaving in roots, which was predominantly catalyzed by acidic invertase, followed by susy and neutral invertase. We concluded that Eucalyptus urophylla is tolerant to Mg deficiency, since the sugar accumulation in leaf tissues is not enough to constrain dry matter accumulation in roots.Os sintomas da deficiência de magnésio (Mg) têm sido bem documentados em plantas cultivadas. A relação entre a deficiência de Mg, como um importante fator de estresse abiótico, e a partição do açúcares, pode restringir o crescimento das raízes e limitar o sucesso do plantio no campo. Apesar disso, os efeitos fisiológicos primários da baixa disponibilidade de Mg permanecem amplamente desconhecidos no eucalipto. Este trabalho buscou investigar como a deficiência de Mg afeta aspectos bioquímicos da partição de açúcares, associados ao acúmulo de matéria seca em raízes de plantas jovens de Eucalyptus urophylla. O experimento foi conduzido em casa de vegetação em delineamento inteiramente casualizado, com parcelas subdivididas 5 x 4, utilizando os seguintes níveis de Mg: 0, 25, 50, 75 e 100% na concentração da solução nutritiva de Clark. As avaliações foram realizadas aos 15, 30, 50 e 120 dias após o plantio (DAP) das mudas em vasos. Determinaram-se os teores de açúcares solúveis (SS) e redutores (RS), as atividades da invertase e da sacarose sintase (susy), e a matéria seca da parte aérea e da raiz. Aumentos nas concentrações de açúcares, tanto SS como RS, foram encontrados em tecidos foliares a partir de 30 DAP. Nos tecidos de raízes, os teores de RS e SS não apresentaram diferenças entre os tratamentos com deficiência de Mg e o controle. Diferenças significativas também não foram encontradas, tanto no acúmulo de matéria seca da raiz, como na razão matéria seca de parte aérea / raízes. A deficiência de Mg não afetou a clivagem de sacarose nas raízes, que foi predominantemente catalisada pela invertase ácida, seguida de susy e invertase neutra. Concluiu-se que Eucalyptus urophylla é tolerante à deficiência de Mg, uma vez que o acúmulo de açúcares nos tecidos foliares não foi suficiente para restringir o acúmulo de matéria seca nas raízes.Universidade Federal de Santa Maria2019-06-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/2620410.5902/1980509826204Ciência Florestal; Vol. 29 No. 2 (2019); 622-631Ciência Florestal; v. 29 n. 2 (2019); 622-6311980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMenghttps://periodicos.ufsm.br/cienciaflorestal/article/view/26204/pdfCopyright (c) 2019 Ciência Florestalinfo:eu-repo/semantics/openAccessBarbosa, Romário PereiraCairo, Paulo Araquém RamosLacerda, Janderson de JesusBotelho, Vinícius Vieira2019-09-05T20:25:07Zoai:ojs.pkp.sfu.ca:article/26204Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2019-09-05T20:25:07Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in eucalyptus young plants Os efeitos da deficiência de magnésio na partição de açúcares não restringem o crescimento de raízes em plantas jovens de eucalipto |
title |
The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in eucalyptus young plants |
spellingShingle |
The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in eucalyptus young plants Barbosa, Romário Pereira Woody plants Mineral nutrition Assimilate partitioning Source-sink system Plantas lenhosas Nutrição mineral Partição de assimilados Fonte-dreno |
title_short |
The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in eucalyptus young plants |
title_full |
The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in eucalyptus young plants |
title_fullStr |
The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in eucalyptus young plants |
title_full_unstemmed |
The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in eucalyptus young plants |
title_sort |
The effects of magnesium deficiency on sugar partitioning do not restrict the root growth in eucalyptus young plants |
author |
Barbosa, Romário Pereira |
author_facet |
Barbosa, Romário Pereira Cairo, Paulo Araquém Ramos Lacerda, Janderson de Jesus Botelho, Vinícius Vieira |
author_role |
author |
author2 |
Cairo, Paulo Araquém Ramos Lacerda, Janderson de Jesus Botelho, Vinícius Vieira |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Barbosa, Romário Pereira Cairo, Paulo Araquém Ramos Lacerda, Janderson de Jesus Botelho, Vinícius Vieira |
dc.subject.por.fl_str_mv |
Woody plants Mineral nutrition Assimilate partitioning Source-sink system Plantas lenhosas Nutrição mineral Partição de assimilados Fonte-dreno |
topic |
Woody plants Mineral nutrition Assimilate partitioning Source-sink system Plantas lenhosas Nutrição mineral Partição de assimilados Fonte-dreno |
description |
The symptoms of magnesium (Mg) deficiency have been well documented in crop plants. The relationship between sugar partitioning and Mg deficiency consists an important abiotic stress that may restrict root growth and limit the success of planting in the field. Despite of this, the primary physiological effects of low Mg availability remain largely unknown in eucalyptus. This paper aimed to investigate how the Mg deficiency affects biochemical aspects of sugar partitioning associated to dry matter accumulation in roots of young Eucalyptus urophylla plants. Experimental work was carried out at a greenhouse, arranged by completely randomized design, consisted by split plot 5x4, with five Mg concentrations (0, 25, 50, 75 and 100 % Mg levels of nutrient solution) and four times of evaluations – 15, 30, 50 and 120 days after planting (DAP). Soluble (SS) and reducing (RS) sugar contents, invertase and sucrose synthase activity and shoot and root dry matter weight were measured. Increased sugar concentrations, both SS and RS, were found in leaf tissues from 30 DAP. In root tissues, neither RS nor SS content showed differences between Mg deficiency and control. Significant differences were also not found neither in root dry matter accumulation, nor in shoot/root dry matter ratio. Mg deficiency did not affect sucrose cleaving in roots, which was predominantly catalyzed by acidic invertase, followed by susy and neutral invertase. We concluded that Eucalyptus urophylla is tolerant to Mg deficiency, since the sugar accumulation in leaf tissues is not enough to constrain dry matter accumulation in roots. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-06-30 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/26204 10.5902/1980509826204 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/26204 |
identifier_str_mv |
10.5902/1980509826204 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/26204/pdf |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Ciência Florestal info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Ciência Florestal |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 29 No. 2 (2019); 622-631 Ciência Florestal; v. 29 n. 2 (2019); 622-631 1980-5098 0103-9954 reponame:Ciência Florestal (Online) instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Florestal (Online) |
collection |
Ciência Florestal (Online) |
repository.name.fl_str_mv |
Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br |
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1799944131800203264 |