Application of pesticides suppress foliar proanthocyanidin content in Leucaena species

Dalzell, Scott A. and Mullen, Brendan F. (2004) Application of pesticides suppress foliar proanthocyanidin content in Leucaena species. Animal Feed Science and Technology, 113 1-4: 191-198. doi:10.1016/j.anifeedsci.2003.10.016


Author Dalzell, Scott A.
Mullen, Brendan F.
Title Application of pesticides suppress foliar proanthocyanidin content in Leucaena species
Journal name Animal Feed Science and Technology   Check publisher's open access policy
ISSN 0377-8401
Publication date 2004-03-01
Sub-type Article (original research)
DOI 10.1016/j.anifeedsci.2003.10.016
Volume 113
Issue 1-4
Start page 191
End page 198
Total pages 8
Place of publication Amsterdam
Publisher Elsevier
Language eng
Subject 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
070501 Agroforestry
Abstract Pesticides are routinely used to protect plants in agricultural and ecological studies that investigate plant secondary metabolism, although the impact of exposure to agrochemicals on the concentrations of secondary metabolites in plant tissues is largely unknown. To screen potential pesticides for use on Leucaena species, the phytotoxic effects of four foliar applied systemic insecticides and one miticide on growth and proanthocyanidin (PA) status of seedlings of six Leucaena species were evaluated in a glasshouse experiment. All pesticides were applied at recommended rates in deionized water, with a surfactant, until excess spray ran off the leaves. These were compared to a water-only control. Plant dry matter (DM) production and the PA concentration (butanol–HCl) in the youngest fully expanded leaves (YFEL) were recorded. All pesticide treatments reduced DM production (P<0.05) across Leucaena species by 13–28% compared to control plants. Application of methidathion, dicofol and dimethoate suppressed mean extractable PA concentrations across Leucaena species by 59, 40 and 23%, respectively (P<0.05), while pirimicarb and demeton-S-methyl did not affect plant extractable PA status (P>0.05). Bound PA contents were not affected by pesticide application. Results highlight the need to understand the impact that application of non-treatment agrochemicals has on the PA status of plants under investigation, in order to prevent phytotoxic interactions confounding the interpretation of experimental results.
Keyword Proanthocyanidin
Condensed tannin
Pesticide phytotoxicity
Leucaena
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Agriculture and Food Sciences
 
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Created: Sat, 18 Mar 2006, 00:47:11 EST