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Association between aflatoxin contamination and drought tolerance traits in peanut

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Arunyanark, A., Jogloy, S., Wongkaew, S., Akkasaeng, C., Vorasoot, N., Wright, G. C., Rachaputi, R. C. N. and Patanothai, A. (2009) Association between aflatoxin contamination and drought tolerance traits in peanut. Field Crops Research, 114 (1). pp. 14-22. ISSN 0378-4290

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Article Link(s): https://doi.org/10.1016/j.fcr.2009.06.018

Publisher URL: https://www.sciencedirect.com/science/article/pii/S0378429009001713

Abstract

The current study investigates the association between drought tolerance traits and aflatoxin contamination in peanut grown under long-term drought. Two field experiments were conducted at Khon Kaen University, Thailand using a split–split plot design with three drought stress levels as main plots, 11 genotypes as sub-plots, and two soil inoculations of Aspergillus flavus treatments as sub-sub-plots. The effects of temperature, soil moisture and A. flavus population on kernel colonization and aflatoxin contamination, and drought tolerance traits viz. specific leaf area (SLA) and root length density (RLD) were measured. The results demonstrated that elevated soil temperatures and reduced soil moisture, favored aflatoxin production. Drought in combination with higher levels of A. flavus inoculum load in the soil resulted in an increase in the fungal populations in the soil which in turn resulted in increased kernel colonization and subsequent aflatoxin contamination. A combination of SLA and RLD, and kernel colonization had a significant influence on aflatoxin contamination under drought conditions in both seasons (r=0.73** and 0.76**). The results revealed that drought tolerance traits (SLA and RLD) could be contributing to resistance to aflatoxin contamination suggesting that a combination of SLA, RLD and kernel colonization could be used as selection criteria in selecting parents for aflatoxin resistance.

Item Type:Article
Business groups:Crop and Food Science
Keywords:Drought stress population Kernel colonization Aflatoxin contamination Specific leaf area Root length density
Subjects:Agriculture > Agriculture (General) > Agricultural meteorology. Crops and climate
Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Plant culture > Food crops
Plant culture > Fruit and fruit culture > Nuts
Plant pests and diseases > Plant pathology
Deposited On:02 Feb 2022 06:12
Last Modified:02 Feb 2022 06:12

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