Root growth of tomato seedlings intensified by humic substances from peat bogs
Peats are an important reserve of humified carbon in terrestrial ecosystems. The interest in the use of humic substances as plant growth promoters is continuously increasing. The objective of this study was to evaluate the bioactivity of alkaline soluble humic substances (HS), humic (HA) and fulvic...
Main Authors: | , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Sociedade Brasileira de Ciência do Solo
2011-10-01
|
Series: | Revista Brasileira de Ciência do Solo |
Subjects: | |
Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500015&lng=en&tlng=en |
id |
doaj-02098d3aa6ff465482b3ec292750a010 |
---|---|
record_format |
Article |
spelling |
doaj-02098d3aa6ff465482b3ec292750a0102021-01-02T00:32:09ZengSociedade Brasileira de Ciência do SoloRevista Brasileira de Ciência do Solo1806-96572011-10-013551609161710.1590/S0100-06832011000500015S0100-06832011000500015Root growth of tomato seedlings intensified by humic substances from peat bogsAlexandre Christofaro Silva0Luciano Pasqualoto Canellas1Fábio Lopes Olivares2Leonardo Barros Dobbss3Natalia Oliveira Aguiar4Daniele Ângela Rossinol Frade5Carlos Eduardo Rezende6Lázaro Eustáquio Pereira Peres7Universidade Federal dos Vales do Jequitinhonha e MucuriUniversidade Estadual do Norte FluminenseUniversidade Estadual do Norte FluminenseUniversidade Estadual do Norte FluminenseUniversidade Estadual do Norte FluminenseUniversidade Estadual do Norte FluminenseUniversidade Estadual do Norte FluminenseUniversidade de São PauloPeats are an important reserve of humified carbon in terrestrial ecosystems. The interest in the use of humic substances as plant growth promoters is continuously increasing. The objective of this study was to evaluate the bioactivity of alkaline soluble humic substances (HS), humic (HA) and fulvic acids (FA) isolated from peats with different decomposition stages of organic matter (sapric, fibric and hemic) in the Serra do Espinhaço Meridional, state of Minas Gerais. Dose-response curves were established for the number of lateral roots growing from the main plant axis of tomato seedlings. The bioactivity of HA was greatest (highest response in lateral roots at lowest concentration) while FA did not intensify root growth. Both HS and HA stimulated root hair formation. At low concentrations, HS and HA induced root hair formation near the root cap, a typical hormonal imbalance effect in plants. Transgenic tomato with reporter gene DR5::GUS allowed the observation that the auxin-related signalling pathway was involved in root growth promotion by HA.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500015&lng=en&tlng=enefeitos fisiológicosbioatividade |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Alexandre Christofaro Silva Luciano Pasqualoto Canellas Fábio Lopes Olivares Leonardo Barros Dobbss Natalia Oliveira Aguiar Daniele Ângela Rossinol Frade Carlos Eduardo Rezende Lázaro Eustáquio Pereira Peres |
spellingShingle |
Alexandre Christofaro Silva Luciano Pasqualoto Canellas Fábio Lopes Olivares Leonardo Barros Dobbss Natalia Oliveira Aguiar Daniele Ângela Rossinol Frade Carlos Eduardo Rezende Lázaro Eustáquio Pereira Peres Root growth of tomato seedlings intensified by humic substances from peat bogs Revista Brasileira de Ciência do Solo efeitos fisiológicos bioatividade |
author_facet |
Alexandre Christofaro Silva Luciano Pasqualoto Canellas Fábio Lopes Olivares Leonardo Barros Dobbss Natalia Oliveira Aguiar Daniele Ângela Rossinol Frade Carlos Eduardo Rezende Lázaro Eustáquio Pereira Peres |
author_sort |
Alexandre Christofaro Silva |
title |
Root growth of tomato seedlings intensified by humic substances from peat bogs |
title_short |
Root growth of tomato seedlings intensified by humic substances from peat bogs |
title_full |
Root growth of tomato seedlings intensified by humic substances from peat bogs |
title_fullStr |
Root growth of tomato seedlings intensified by humic substances from peat bogs |
title_full_unstemmed |
Root growth of tomato seedlings intensified by humic substances from peat bogs |
title_sort |
root growth of tomato seedlings intensified by humic substances from peat bogs |
publisher |
Sociedade Brasileira de Ciência do Solo |
series |
Revista Brasileira de Ciência do Solo |
issn |
1806-9657 |
publishDate |
2011-10-01 |
description |
Peats are an important reserve of humified carbon in terrestrial ecosystems. The interest in the use of humic substances as plant growth promoters is continuously increasing. The objective of this study was to evaluate the bioactivity of alkaline soluble humic substances (HS), humic (HA) and fulvic acids (FA) isolated from peats with different decomposition stages of organic matter (sapric, fibric and hemic) in the Serra do Espinhaço Meridional, state of Minas Gerais. Dose-response curves were established for the number of lateral roots growing from the main plant axis of tomato seedlings. The bioactivity of HA was greatest (highest response in lateral roots at lowest concentration) while FA did not intensify root growth. Both HS and HA stimulated root hair formation. At low concentrations, HS and HA induced root hair formation near the root cap, a typical hormonal imbalance effect in plants. Transgenic tomato with reporter gene DR5::GUS allowed the observation that the auxin-related signalling pathway was involved in root growth promotion by HA. |
topic |
efeitos fisiológicos bioatividade |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500015&lng=en&tlng=en |
work_keys_str_mv |
AT alexandrechristofarosilva rootgrowthoftomatoseedlingsintensifiedbyhumicsubstancesfrompeatbogs AT lucianopasqualotocanellas rootgrowthoftomatoseedlingsintensifiedbyhumicsubstancesfrompeatbogs AT fabiolopesolivares rootgrowthoftomatoseedlingsintensifiedbyhumicsubstancesfrompeatbogs AT leonardobarrosdobbss rootgrowthoftomatoseedlingsintensifiedbyhumicsubstancesfrompeatbogs AT nataliaoliveiraaguiar rootgrowthoftomatoseedlingsintensifiedbyhumicsubstancesfrompeatbogs AT danieleangelarossinolfrade rootgrowthoftomatoseedlingsintensifiedbyhumicsubstancesfrompeatbogs AT carloseduardorezende rootgrowthoftomatoseedlingsintensifiedbyhumicsubstancesfrompeatbogs AT lazaroeustaquiopereiraperes rootgrowthoftomatoseedlingsintensifiedbyhumicsubstancesfrompeatbogs |
_version_ |
1724363618864070656 |