Effect of temperature and humidity regimes on grain mold sporulation and seed quality in sorghum (<i>Sorghum bicolor</i>(L.) Moench)

Tonapi, Vilas A.; Mundada, R R; Navi, Shrishail S.; Reddy, R. K.; Thakur, R. P.; Bandyopadhyay, Ranajit; Varanavasiappan, S.; Seetharama, N.

doi:10.1080/03235400500355626

Cited by 21 publications

(19 citation statements)

References 8 publications

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“…The effect of temperature on the dynamics of spore production was in substantial agreement with previous studies (Jaurihar and Mehta 1973;Devi and Singh 1994;Tonapi et al 2007) and confirmed the ability of the fungus to develop under a wide range of temperatures (Marín et al 1995(Marín et al , 1996(Marín et al , 1999. Spore production occurred between 5°C and 45°C.…”

Section: Discussionsupporting

confidence: 88%

“…It likely that this results from the favourable effect of high relative humidity (Tonapi et al 2007) and of water availability in the substrate (Hsieh et al 1979) on spore production. In fact, rain, irrigation and the flux from the atmosphere (measured by the VPD) all provided soil and the stalk residues with water.…”

Section: Discussionmentioning

confidence: 97%

“…Temperature must be considered as an environmental factor that influences spore production under field conditions, in addition to the availability of water (Hsieh et al 1979), humidity (Indira and Muthusubramanian 2004;Tonapi et al 2007), and alternate light and dark (Devi and Singh 1994).…”

Section: Discussionmentioning

confidence: 99%

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Effect of environmental conditions on spore production by Fusarium verticillioides, the causal agent of maize ear rot

2008

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Silk infection by Fusarium verticillioides is caused by conidia produced on maize crop residues and results in kernel infection and consequent accumulation of fumonisins. Studies were carried out in both controlled and field conditions to understand the dynamics of sporulation on maize residues. The effect of temperature (5°C to 45°C) and incubation time (3 to 41 days) on spore production on maize meal agar was described by a logistic model that accounted for 85% of variability. The rate parameter depended on the length of incubation and the asymptote on temperature. Maximum sporulation occurred at 27°C, with a progressive increase between 5°C and 27°C and then a rapid decline, with no sporulation at 45°C. Fusarium verticillioides strains from different geographic origins showed different sporulation capabilities, with similar optimum temperatures. Pieces of stalk residues inoculated with F. verticillioides and placed above the soil between rows of maize crops, in 2003 to 2005, produced conidia continuously and abundantly for some weeks, particularly during the period after silk emergence, with an average of 1.59×10 7 conidia g −1 of stalk, over a wide range of environmental conditions. Sixty-seven percent of variability of the spore numbers found on stalks was accounted for by a multiple regression model. Precipitation (rain or overhead irrigation) in the 14 days before stalk sampling decreased the number of spores, whilst the number of days with conducive conditions of moisture (i.e. days with rainfall, average relative humidity >85% or vapour pressure deficit <4 hPa) and greater degreedays (base 0°C) in the 14 and 3 days before sampling, respectively, increased sporulation.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 97%

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Effect of environmental conditions on spore production by Fusarium verticillioides, the causal agent of maize ear rot

2008

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“…open-source statistical software R version 3.4.5 [16]. Descriptive statistics of recorded data were generated with pastecs package [17].…”

Section: Data Analysis Data Analysis Was Performed With Thementioning

confidence: 99%

Identification of Sources of Resistance for Peanut Aspergillus flavus Colonization and Aflatoxin Contamination

Dieme

Faye

Zoclanclounon

et al. 2018

International Journal of Agronomy

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Peanut aflatoxin contamination caused by Aspergillus flavus is a serious constraint for food safety and human health in Senegal. The present study aimed to identify sources of resistance for A. flavus colonization and aflatoxin contamination. Thus, seeds from 67 peanut genotypes were tested under laboratory conditions. Aqueous conidial suspension of an aflatoxinogenic strain of A. flavus was used for inoculation in Petri dishes containing ten seeds of each genotype, and data on incidence and severity were recorded. Total aflatoxin concentration in seeds was determined on 15th day after inoculation using mReader® method. Results showed a significant (p<0.001) variation of aflatoxin, incidence and severity among the tested peanut genotypes. Incidence ranged from 0 to 70% with a mean of 20.36 ± 0.8%. Out of the 67 genotypes, eight showed incidence less than 10%. Severity ranged from 0 to 44% with a mean value of 8.82 ± 0.45%. The genotype 12CS_104 showed aflatoxin concentration level in conformity with the European standard (4 ppb). Out of three clusters revealed by hierarchical classification based on disease incidence and severity, the cluster 1 contained 33 genotypes characterised by low incidence and severity values. These genotypes can be tested under field conditions to confirm their resistance to A flavus.

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“…e estimated field production losses due to grain mold ranges from 30% to 100% [18]. is results in a reduction in food availability, exposure to health risks through contaminated food, and income losses through lower prices [19]. Efforts in improving grain mold resistance in high yielding genotypes have been limited because the disease is governed by multiple mechanisms of resistance.…”

Section: Introductionmentioning

confidence: 99%

Multienvironment Evaluation of Tannin-Free Photoperiod-Insensitive Sorghum (Sorghum bicolor (L) Moench) for Yield and Resistance to Grain Mold in Senegal

Diatta

Sarr

Tovignan

et al. 2021

International Journal of Agronomy

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Combining resistance to grain mold with high grain yield in tannin-free white-grained photoperiod-insensitive sorghum is of major interest for farmers in Senegal. In this study, GGE biplot analysis was used to assess the performance, adaptability, and stability of eleven sorghum parental lines and their hybrid combinations for yield and grain mold resistance under Senegalese environments. Eleven inbred lines along with their 22 hybrid combinations and one check were evaluated across three sites during the 2015 and 2016 rainy seasons under natural grain mold infestation. The results of this study showed strong genetic variability among studied genotypes for all measured traits. The highly significant G × E interaction effects for grain yield and panicle grain mold rating score (PGMR) indicated that both traits are influenced by genetics and to some extent by environment. Broad-sense heritability computed was high for all these traits except PGMR, showing a high environmental pressure on this later. The study showed that grain mold pressure in the studied sites decreased following a South-North gradient similar to the rainfall pattern, with the south region wetter, explaining the high disease pressure in Darou and Sinthiou Maleme contrary to Bambey. The GGE biplot analysis performed showed that the first two principal components explained 85.84% of the total variation of GGE sum of squares for grain yield. The which-won-where view of the GGE biplot for grain yield showed that the hybrid HB16 was the most adapted for Bambey area. The ranking of genotypes based on both yield performance and stability showed that HB16, HB5, HB21, HB18, and HB7 were the best hybrids combining high grain yield, high stability performance, and tolerance to grain mold disease across the test environments. These hybrids outperformed the best yielding inbred line P29 (2196.7 kg ha−1) with grain yield advantages ranging 17–60%. Therefore, these hybrids could be recommended to farmers in order to improve sorghum yield in Senegal.

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Effect of temperature and humidity regimes on grain mold sporulation and seed quality in sorghum (Sorghum bicolor(L.) Moench)

Cited by 21 publications

References 8 publications

Effect of environmental conditions on spore production by Fusarium verticillioides, the causal agent of maize ear rot

Effect of environmental conditions on spore production by Fusarium verticillioides, the causal agent of maize ear rot

Identification of Sources of Resistance for Peanut Aspergillus flavus Colonization and Aflatoxin Contamination

Multienvironment Evaluation of Tannin-Free Photoperiod-Insensitive Sorghum (Sorghum bicolor (L) Moench) for Yield and Resistance to Grain Mold in Senegal

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