Phytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field.

<h4>Background</h4>Exploring the residence time of allelochemicals released by plants into different soils, episodic exposure of plants to allelochemicals, and the effects of allelochemicals in the field has the potential to improve our understanding of interactions among plants.<h4&g...

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Autores principales:	Inderjit, Jarrod L Pollock, Ragan M Callaway, William Holben
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2008
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d0af76bf4bfc45eba98f0e3d99eb3551
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spelling	oai:doaj.org-article:d0af76bf4bfc45eba98f0e3d99eb35512021-11-25T06:11:45ZPhytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field.1932-620310.1371/journal.pone.0002536https://doaj.org/article/d0af76bf4bfc45eba98f0e3d99eb35512008-07-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18648546/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Exploring the residence time of allelochemicals released by plants into different soils, episodic exposure of plants to allelochemicals, and the effects of allelochemicals in the field has the potential to improve our understanding of interactions among plants.<h4>Methodology/principal findings</h4>We conducted experiments in India and the USA to understand the dynamics of soil concentrations and phytotoxicity of (+/-)-catechin, an allelopathic compound exuded from the roots of Centaurea maculosa, to other plants in vitro and in soil. Experiments with single and pulsed applications into soil were conducted in the field. Experimental application of (+/-)-catechin to soils always resulted in concentrations that were far lower than the amounts added but within the range of reported natural soil concentrations. Pulses replenished (+/-)-catechin levels in soils, but consistently at concentrations much lower than were applied, and even pulsed concentrations declined rapidly. Different natural soils varied substantially in the retention of (+/-)-catechin after application but consistent rapid decreases in concentrations over time suggested that applied experimental concentrations may overestimate concentrations necessary for phytotoxicity by over an order of magnitude. (+/-)-Catechin was not phytotoxic to Bambusa arundinacea in natural Indian soil in a single pulse, but soil concentrations at the time of planting seeds were either undetectable or very low. However, a single dose of (+/-)-catechin suppressed the growth of bamboo in sand, in soil mixed with organic matter, and Koeleria macrantha in soils from Montana and Romania, and in field applications at 40 microg l(-1). Multiple pulses of (+/-)-catechin were inhibitory at very low concentrations in Indian soil.<h4>Conclusions/significance</h4>Our results demonstrate that (+/-)-catechin is highly dynamic in natural soils, but is phytotoxic well below natural concentrations measured in some soils and applied at low concentrations in the field. However, there is substantial conditionality in the effects of the allelochemical.InderjitJarrod L PollockRagan M CallawayWilliam HolbenPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 3, Iss 7, p e2536 (2008)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Inderjit Jarrod L Pollock Ragan M Callaway William Holben Phytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field.
description	<h4>Background</h4>Exploring the residence time of allelochemicals released by plants into different soils, episodic exposure of plants to allelochemicals, and the effects of allelochemicals in the field has the potential to improve our understanding of interactions among plants.<h4>Methodology/principal findings</h4>We conducted experiments in India and the USA to understand the dynamics of soil concentrations and phytotoxicity of (+/-)-catechin, an allelopathic compound exuded from the roots of Centaurea maculosa, to other plants in vitro and in soil. Experiments with single and pulsed applications into soil were conducted in the field. Experimental application of (+/-)-catechin to soils always resulted in concentrations that were far lower than the amounts added but within the range of reported natural soil concentrations. Pulses replenished (+/-)-catechin levels in soils, but consistently at concentrations much lower than were applied, and even pulsed concentrations declined rapidly. Different natural soils varied substantially in the retention of (+/-)-catechin after application but consistent rapid decreases in concentrations over time suggested that applied experimental concentrations may overestimate concentrations necessary for phytotoxicity by over an order of magnitude. (+/-)-Catechin was not phytotoxic to Bambusa arundinacea in natural Indian soil in a single pulse, but soil concentrations at the time of planting seeds were either undetectable or very low. However, a single dose of (+/-)-catechin suppressed the growth of bamboo in sand, in soil mixed with organic matter, and Koeleria macrantha in soils from Montana and Romania, and in field applications at 40 microg l(-1). Multiple pulses of (+/-)-catechin were inhibitory at very low concentrations in Indian soil.<h4>Conclusions/significance</h4>Our results demonstrate that (+/-)-catechin is highly dynamic in natural soils, but is phytotoxic well below natural concentrations measured in some soils and applied at low concentrations in the field. However, there is substantial conditionality in the effects of the allelochemical.
format	article
author	Inderjit Jarrod L Pollock Ragan M Callaway William Holben
author_facet	Inderjit Jarrod L Pollock Ragan M Callaway William Holben
author_sort	Inderjit
title	Phytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field.
title_short	Phytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field.
title_full	Phytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field.
title_fullStr	Phytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field.
title_full_unstemmed	Phytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field.
title_sort	phytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field.
publisher	Public Library of Science (PLoS)
publishDate	2008
url	https://doaj.org/article/d0af76bf4bfc45eba98f0e3d99eb3551
work_keys_str_mv	AT inderjit phytotoxiceffectsofcatechininvitroinsoilandinthefield AT jarrodlpollock phytotoxiceffectsofcatechininvitroinsoilandinthefield AT raganmcallaway phytotoxiceffectsofcatechininvitroinsoilandinthefield AT williamholben phytotoxiceffectsofcatechininvitroinsoilandinthefield
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Phytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field.

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