Effects of soil temperature and moisture on the pathogenicity of fungi associated with root rot of subterranean clover

Wong, DH; Barbetti, MJ; Sivasithamparam, Krishnapillai

doi:10.1071/ar9840675

Cited by 79 publications

(79 citation statements)

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Section: Journal Of Soil and Water Conservationsupporting

confidence: 83%

“…Fusarium incidence decreased from 70% to 56% as watering amount increased from 5% to 12%. This result supports our field observations and also confirms previous reports that well-drained and dry soil favor Fusarium survival and multiplication (Cook and Papendick 1972;Stover 1953;Tan et al 2002;Wong et al 1984).Root dry weight was not different between soil sources (p = 0.19) but increased with increasing watering intensity (p < 0.01) (table 3). Root length was different between the two cultivars, and there was a significant cultivar × soil source interaction.…”

supporting

confidence: 82%

“…This study also supports that the well-drained soils favor survival and multiplication of Fusarium spp. (Cook and Papendick 1972;Stover 1953;Tan et al 2002;Wong et al 1984).…”

Section: Resultsmentioning

confidence: 99%

“…Fusarium spp. are more active and survive best in dry soil compared to wet soil and, therefore, cause more root disease when soil moisture is not high (Cook and Papendick 1972;Stover 1953;Wong et al 1984 Each block consisted of four drainage treatments. These two blocks were analyzed as one experiment considering blocks as replications.…”

Section: Abstract: Drainage-fusarium Spp-root Rot-soybeanmentioning

confidence: 99%

“…This study also supports that the well-drained soils favor survival and multiplication of Fusarium spp. (Cook and Papendick 1972;Stover 1953;Tan et al 2002;Wong et al 1984).Drainage treatments in the field were not significantly different for root dry weight, total root length, average root diameter, and root tips number in 2013 (table 1).Greenhouse Experiments. Main effects of soil source and cultivars were not significant for root rot severity in the greenhouse (p = 0.70; p = 0.11), but the soil source × cultivar interaction was significant (p < 0.01).…”

mentioning

confidence: 99%

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Influence of drainage on soybean seedling health

Han¹,

Kandel²,

Leandro³

et al. 2017

Journal of Soil and Water Conservation

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Subsurface tile drainage is a commonly used agricultural practice in Iowa croplands. Little is known about the effect of drainage on soybean (Glycine max) disease. Field and greenhouse studies were conducted to study the effect of drainage on seedling health. A field experiment was conducted at the Iowa State University research farm near Crawfordsville, Iowa, in 2012 and2013 (ND, no artificial drainage). A greenhouse experiment was conducted three times to compare two soil sources (ND and CvD soil from the field experiment), two soybean cultivars (Ripley and Williams 82), and three watering intensities (low, moderate, and saturated). Plants were sampled at the second trifoliate stage to assess root rot severity, root dry weight, root size, and Fusarium spp. incidence in roots. In the field, root rot severity was significantly (p < 0.01) greater in the ND and SD drainage treatments than in the CvD treatment in 2013 but not in 2012. Fusarium spp. were isolated less frequently from roots grown in ND soil than all other drainage treatments, in both years. In the greenhouse study, watering intensity significantly affected root rot on Ripley, with more water causing more root rot (p < 0.01). Despite greater rot, roots showed increased root weight, root length, root diameter, and number of root tips with increasing soil water up to saturation for both varieties. Fusarium incidence decreased as water amount increased. In summary, fields with high moisture are more prone to root rot, but well-drained soil favors infection of soybean roots by Fusarium spp. Key words: drainage-Fusarium spp.-root rot-soybeanAmple water supply is essential for plant growth; however, excessively wet soils cause several problems including inadequate soil oxygen (O 2 ) supply, reduced nutrient uptake, poor root growth, inadequate nodulation, and decreased photosynthesis, resulting in reduced foliage that ultimately impacts yield (Linkemer et al. 1998). Soybean (Glycine max L.) germination and emergence is favored in well-aerated soils (Pavelis 1987). Additionally, lower soil moisture increases soil trafficability, which can lead to earlier planting and germination, which potentially protect plants from possible later season water deficiency (Bornstin and Hedstrom 1982;Mayhew and Caviness 1994;Mengistu and Heatherly 2006). Subsurface drainage covers 12% of the agriculture land in the United States and accounts for 3.6 × 10 6 ha (8.9 × 10 6 ac) of cropland in Iowa (Baker et al. 2004;Evans and Fausey 1999; Garrison et al. 1999;Linkemer et al. 1998). Subsurface drainage is one of the most valuable practices to protect the crops as it can remove excess water after a heavy rain or over irrigation from the upper portions of the active root zone. The benefits of drainage include (1) removing excessive water that accumulated below the surface and therefore creating a well-aerated soil condition that favors soybean germination (Evans and Fausey 1999;Pavelis 1987;Tyagi and Tripathi 1983); (2) increasing trafficability by facilitating heavy ...

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Section: Journal Of Soil and Water Conservationsupporting

confidence: 83%

supporting

confidence: 82%

“…This study also supports that the well-drained soils favor survival and multiplication of Fusarium spp. (Cook and Papendick 1972;Stover 1953;Tan et al 2002;Wong et al 1984).…”

Section: Resultsmentioning

confidence: 99%

Section: Abstract: Drainage-fusarium Spp-root Rot-soybeanmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Influence of drainage on soybean seedling health

Han¹,

Kandel²,

Leandro³

et al. 2017

Journal of Soil and Water Conservation

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Calcium and strontium anthranilato complexes as effective Fusarium moniliforme controlling agents

Mahmoud

Zidan

Aly

et al. 2018

Applied Organom Chemis

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This paper presents the one‐pot reaction synthesis of coordination calcium and strontium compounds [Ca(L)2(H2O)2 1 and Sr(L)2(H2O)2 2] with the 2‐(4‐chlorophenylamino) benzoic acid ligand (HL = C13H10NO2Cl). The complexes were obtained in good yields, and their structures were corroborated according to their CHN, spectroscopic (IR and UV/Vis.) and solution molar conductivity data as the latter confirmed their molecular nature. Additionally, the powder X‐ray diffraction pattern of the complexes was used to determine the cell parameters and the hkl indices together with their corresponding 2θ values. The microbial resistance against the currently available antifungal agents requires searching for new antifungal compounds. Promising fungicidal activities of these coordination complexes were determined against the Fusarium corn disease as complexes 1 and 2 at 30°C inhibited the grain pathogenicity by 70% and 66%, respectively. Moreover, 1 and 2 retarded the amylase enzymes that are responsible for the pathogenicity by 35.13% and 26.22% at 30°C.

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Elevational variation in density dependence in a subtropical forest

2014

Ecology and Evolution

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Density-dependent mortality has been recognized as an important mechanism that underpins tree species diversity, especially in tropical forests. However, few studies have attempted to explore how density dependence varies with spatial scale and even fewer have attempted to identify why there is scale-dependent differentiation. In this study, we explore the elevational variation in density dependence. Three 1-ha permanent plots were established at low and high elevations in the Heishiding subtropical forest, southern China. Using data from 1200 1 m2 seedling quadrats, comprising of 200 1 m2 quadrats located in each 1-ha plot, we examined the variation in density dependence between elevations using a generalized linear mixed model with crossed random effects. A greenhouse experiment also investigated the potential effects of the soil biota on density-dependent differentiation. Our results demonstrated that density-dependent seedling mortality can vary between elevations in subtropical forests. Species found at a lower elevation suffered stronger negative density dependence than those found at a higher elevation. The greenhouse experiment indicated that two species that commonly occur at both elevations suffered more from soilborne pathogens during seed germination and seedling growth when they grew at the lower elevation, which implied that soil pathogens may play a crucial role in density-dependent spatial variation.

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Effects of soil temperature and moisture on the pathogenicity of fungi associated with root rot of subterranean clover

Cited by 79 publications

References 0 publications

Influence of drainage on soybean seedling health

Influence of drainage on soybean seedling health

Calcium and strontium anthranilato complexes as effective Fusarium moniliforme controlling agents

Elevational variation in density dependence in a subtropical forest

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