Association between aflatoxin contamination and N2 fixation in peanut under drought conditions

Arunyanark, A. and Pimratch, S. and Jogloy, S. and et al, . (2012) Association between aflatoxin contamination and N2 fixation in peanut under drought conditions. International Journal of Plant Production (IJPP), 6 (2). pp. 161-172.

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Abstract

Abstract Traits related to nitrogen fixation may be used as indirect selection criteria for aflatoxin resistance in peanut. The aim of this study was to investigate the relationship between N2 fixation traits and aflatoxin contamination in peanut under different drought conditions. Eleven peanut genotypes were evaluated under three water regimes for two seasons in the field. Data were observed on kernel infection by Aspergillus flavus, aflatoxin contamination, total nitrogen content, N2 fixation and its related traits viz. nodule number, nodule dry weight and nitrogenese activity. Drought stress reduced total nitrogen content and N2 fixation, but it increased kernel infection and aflatoxin contamination. Total nitrogen content, N2 fixation and its related traits had negative and significant effects on kernel infection and aflatoxin contamination especially under drought conditions. In addition, negative correlations between kernel infection and aflatoxin contamination with drought tolerance index (DTI) of N2 fixation traits were also found. The results indicated that the ability to maintain high N2 fixation under drought conditions of peanut genotypes can result in better resistance to aflatoxin contamination. Keywords: Aflatoxin contamination; Aspergillus flavus; Kernel infection; Drought tolerance; Nitrogen content; N2 fixation

Item Type: Article
Author Affiliation: Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom 73140, Thailand
Subjects: Plant Protection > Pests
Divisions: Groundnut
Depositing User: Ms K Syamalamba
Date Deposited: 06 Apr 2012 09:08
Last Modified: 06 Apr 2012 09:08
Official URL: http://journals.gau.ac.ir:8080/ijpp/Content.aspx?v...
URI: http://eprints.icrisat.ac.in/id/eprint/4533

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