Association between aflatoxin contamination and drought tolerance traits in peanut

Arunyanark, A.; Jogloy, Sanun; Wongkaew, Sopone; Akkasaeng, C.; Vorasoot, Nimitr; Wright, G. C.; Rachaputi, Rao C. N.; Patanothai, A.

doi:10.1016/j.fcr.2009.06.018

Cited by 41 publications

(40 citation statements)

References 28 publications

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“…The single validation site which did not fit with the thresholds and risk prediction had been inoculated with A. flavus-infested grits. Arunyanark et al (2009) noted that inoculation increased aflatoxin contamination regardless of the drought-status of the peanut crop. Specifically, severe drought increased ppb by 175% compared to non-inoculated irrigated treatment (7 ppb compared to 4 ppb), while inoculation plus severe drought increased ppb by 625% (29 ppb).…”

Section: Discussionmentioning

confidence: 99%

Temperature and Moisture Conditions That Affect Aflatoxin Contamination of Peanuts

Bowen

Hagan

2015

Peanut Science

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Reliable prediction of aflatoxin occurrence in peanut is needed so that growers can make appropriate management decisions when contamination risk is high. The goal of this study was to develop such a prediction system. Aflatoxin concentrations were monitored in rainfed peanuts over 5 yr at the Wiregrass Research and Extension Center in SE Alabama; in each year, 4 planting dates subjected the crop to different temperatures and rainfall patterns. The first planting in each year was in late April with subsequent plantings scheduled at 2 wk intervals. Daily maximum temperatures averaged over the final 6 wk prior to inversion (MaxT.6wk) and cumulative 3-d-dry periods during the 4 wk prior to inversion (d3d.4wk) were better correlated to aflatoxin levels than other temperature and moisture variables including rain days and total precipitation. When MaxT.6wk . 31.5 C and d3d.4wk $17, there was a high risk ($30% chance of .20 ppb) of aflatoxin contamination in peanuts; when neither of these conditions were met, the risk was lower. Further, when MaxT.6wk . 31.5 C, d3d.4wk could be used to predict the risk for aflatoxin contamination in peanuts. Specifically, the proportion of samples with .20 ppb (PGT20) was used to reflect the risk for aflatoxin contamination; when MaxT.6wk . 31.5 C, PGT20 5 14.03 3 d3d.4wk -209.48 (0 $ PGT20 # 100; R 2 5 0.77, P 5 0.0097). Knowing the precise temperature and moisture thresholds for aflatoxin occurrence in peanuts, and the ability to predict the risk for aflatoxin problems in peanuts, can contribute to improving crop management for minimizing aflatoxin contamination in peanuts and reducing the number of aflatoxin contaminated loads accepted by shellers.

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Section: Discussionmentioning

confidence: 99%

Temperature and Moisture Conditions That Affect Aflatoxin Contamination of Peanuts

Bowen

Hagan

2015

Peanut Science

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“…These diseases drastically reduce pod yield in groundnut as well as haulm quantity and quality. Aflatoxins produced by Aspergillus flavus and A. parasiticus also reduce grain quality resulting in lower incomes for farmers [18,19]. The abiotic constraints include poor soil fertility (lower levels of N, P, and Ca) and erratic rainfall which results in intermittent drought [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Selected Groundnut (Arachis hypogaea L.) Lines for Yield and Haulm Nutritive Quality Traits

Oteng‐Frimpong

Konlan²,

Denwar

2017

International Journal of Agronomy

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Groundnut, the most important grain legume in Ghana, is largely cultivated under rainfed conditions within the Guinea savanna zone of the country. The pods and haulms are important sources of income for smallholder farmers in the region. There is an emerging market for groundnut haulms as livestock feed in Ghana. A population of 30 groundnut genotypes were evaluated for yield (pod and haulm) and its components as well as good haulm nutritive value. High significant differences were observed among the genotypes for all agronomic traits. Average pod yield ranged from 1.6 to 5.7 t/ha with SAMNUT 23 and ICGV-IS 13081 being the most productive. Eight out of the 30 genotypes produced haulm yields above 8 t/ha. There was no significant difference among genotypes for in vitro gas production, digestible organic matter, ash, neutral detergent fibre, and metabolizable energy. However, crude protein, crude fibre, and acid detergent fibre were significantly different. Crude protein content was highest (12.53%) in GAF 1723 and lowest (8.00%) in ICGV-IS 08837. Genotypes GAF 1723, ICGV 00064, and ICGV-IS 13998 combined good pod/haulm yield with high haulm nutritive quality. Their utilization will improve farmers' income and livelihoods in the Guinea savanna of Ghana.

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“…Drought stress seems to function as a predisposing factor for PAC in peanut [78,79]. Therefore, a common idea arises that drought tolerant cultivars would assist in alleviating PAC, indicating that direct or indirect selection for PAC during drought tolerance would be appropriate.…”

Section: Correlating Environmental Stress and Aflatoxin Resistance Inmentioning

confidence: 98%

Resistance to Aspergillus flavus in maize and peanut: Molecular biology, breeding, environmental stress, and future perspectives

et al. 2015

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The colonization of maize (Zea mays L.) and peanut (Arachis hypogaea L.) by the fungal pathogen Aspergillus flavus results in the contamination of kernels with carcinogenic mycotoxins known as aflatoxins leading to economic losses and potential health threats to humans. The regulation of aflatoxin biosynthesis in various Aspergillus spp. has been extensively studied, and has been shown to be related to oxidative stress responses. Given that environmental stresses such as drought and heat stress result in the accumulation of reactive oxygen species (ROS) within host plant tissues, host-derived ROS may play an important role in cross-kingdom communication between host plants and A. flavus. Recent technological advances in plant breeding have provided the tools necessary to study and apply knowledge derived from metabolomic, proteomic, and transcriptomic studies in the context of productive breeding populations. Here, we review the current understanding of the potential roles of environmental stress, ROS, and aflatoxin in the interaction between A.flavus and its host plants, and the current status in molecular breeding and marker discovery for resistance to A. flavus colonization and aflatoxin contamination in maize and peanut. We will also propose future directions and a working model for continuing research efforts linking environmental stress tolerance and aflatoxin contamination resistance in maize and peanut.

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Association between aflatoxin contamination and drought tolerance traits in peanut

Cited by 41 publications

References 28 publications

Temperature and Moisture Conditions That Affect Aflatoxin Contamination of Peanuts

Temperature and Moisture Conditions That Affect Aflatoxin Contamination of Peanuts

Evaluation of Selected Groundnut (Arachis hypogaea L.) Lines for Yield and Haulm Nutritive Quality Traits

Resistance to Aspergillus flavus in maize and peanut: Molecular biology, breeding, environmental stress, and future perspectives

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