Fusarium verticillioides inoculum potential influences soybean seed quality

Pedrozo, Rodrigo; Little, Christopher R.

doi:10.1007/s10658-016-1127-z

Cited by 12 publications

(12 citation statements)

References 12 publications

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“…To be worthwhile, F. vericillioides, F. fujikuroi and F. proliferatum classified into the FFSC were specifically isolated from intercropping. Actually, they are among important pathogens causing maize ear rot and stalk rot in Sichuan Province and other countries [49][50][51][52]. In this study, the co-growth period for maize and soybean lasts more than two months in our maize/soybean relay strip intercropping pattern, and this might provide enough time for the dispersion of Fusarium spores causing maize stalk rot to soybean becoming the inoculums of seedling blight and pod decay of soybean [53].…”

Section: Pcr Amplification and Phylogenetic Analysismentioning

confidence: 82%

Maize/Soybean Relay Strip Intercropping Reduces the Occurrence of Fusarium Root Rot and Changes the Diversity of the Pathogenic Fusarium Species

Chang

Naeem

et al. 2020

Pathogens

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Fusarium species are the most detrimental pathogens of soybean root rot worldwide, causing large loss in soybean production. Maize/soybean relay strip intercropping has significant advantages on the increase of crop yields and efficient use of agricultural resources, but its effects on the occurrence and pathogen population of soybean root rot are rarely known. In this study, root rot was investigated in the fields of the continuous maize/soybean strip relay intercropping and soybean monoculture. Fusarium species were isolated from diseased soybean roots and identified based on sequence analysis of translation elongation factor 1α (EF-1α) and RNA polymerase II second largest subunit (RPB2), and the diversity and pathogenicity of these species were also analyzed. Our results showed that intercropping significantly decreased soybean root rot over monoculture. A more diverse Fusarium population including Fusarium solani species complex (FSSC), F. incarnatum-equiseti species complex (FIESC), F. oxysporum, F. fujikuroi, F. proliferatum and F. verticillioides, F. graminearum and F. asiaticum was identified from intercropping while FSSC, FIESC, F. oxysporum, F. commune, F. asiaticum and F. meridionale were found from monoculture. All Fusarium species caused soybean root infection but exhibited distinct aggressiveness. The most aggressive F. oxysporum was more frequently isolated in monoculture than intercropping. FSSC and FIESC were the dominant species complex and differed in their aggressiveness. Additionally, F. fujikuroi, F. proliferatum and F. verticillioides were specifically identified from intercropping with weak or middle aggressiveness. Except for F. graminearum, F. meridionale and F. asiaticum were firstly reported to cause soybean root rot in China. This study indicates maize/soybean relay strip intercropping can reduce soybean root rot, change the diversity and aggressiveness of Fusarium species, which provides an important reference for effective management of this disease.

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Section: Pcr Amplification and Phylogenetic Analysismentioning

confidence: 82%

Maize/Soybean Relay Strip Intercropping Reduces the Occurrence of Fusarium Root Rot and Changes the Diversity of the Pathogenic Fusarium Species

Chang

Naeem

et al. 2020

Pathogens

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“…These genera have previously been reported as the important pathogens of several soybean diseases, such as seedling blight, root rot and pod and seed decay by Fusarium spp. [ 4 , 10 , 25 , 27 , 37 ]; seedling blight and seed decay caused by Diaporthe/Phomopsis species complex [ 15 , 18 ]; soybean anthracnose caused by Colletotrichum spp. [ 21 , 38 ]; and leaf spot by Alternaria spp.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies showed that only 33% of soybean seeds were infected by Fusarium species in Kansas [ 37 ]. Among nine Fusarium species found in soybean seeds, F. semitectum was the most frequent species in Kansas with the isolation frequency of 56.42% followed by F. proliferatum (19.25%) and F. verticillioides (13.20%), while F. equiseti (2.80%), F. fujikuroi (1.95%) and F. graminearum (0.33%) were isolated in low frequency among naturally infected seeds [ 25 , 40 , 41 ]. In our study, five Fusarium species were identified from intercropped soybean seeds, but they had different isolation frequency.…”

Section: Discussionmentioning

confidence: 99%

“…caulivora in Diaporthe/Phomopsis complex can also cause seed decay [ 1 , 19 , 22 ]. Besides Phomopsis spp., several Fusarium species have frequently been reported to deteriorate the seed quality, as well as cause root rot, seed decay and pod and seedling blight [ 10 , 23 , 24 , 25 ]. In North America, at least 14 species in the Fusarium genus have reported in soybean seeds [ 2 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…In North America, at least 14 species in the Fusarium genus have reported in soybean seeds [ 2 , 17 ]. Among them, the infection of F. verticillioides changed flavonoids content in seeds and resulted in poor seed quality [ 3 , 25 ]. In China, Fusarium species have the potential to cause seed and pod decay and root rot in soybean [ 4 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

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Diversity of the Seedborne Fungi and Pathogenicity of Fusarium Species Associated with Intercropped Soybean

Chang

Naeem

et al. 2020

Pathogens

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Maize/soybean relay strip intercropping has been widely practiced in Southwest China due to its high productivity and effective application of agricultural resources; however, several seedborne diseases such as seedling blight, pod and seed decay are frequently observed causing severe yield loss and low seed quality. So far, the population and pathogenicity of the seedborne fungi associated with intercropped soybean remain unexplored. In this study, seeds of 12 soybean cultivars screened for intercropping were collected from three growing regions in Sichuan Province of Southwest China, and the seedborne fungi were isolated from the surface-sterilized seeds. Based on sequence analysis of ribosomal DNA internal transcribed spacer (rDNA ITS), 148 isolates were identified into 13 fungal genera, among which Fusarium covered 55.0% as the biggest population followed by Colletotrichum. Furthermore, Fusarium isolates were classified into five distinct species comprising F. fujikuroi, F. proliferatum, F. verticillioides, F. asiaticum and F. incarnatum through sequence analysis of translation elongation factor 1 alpha (EF-1α) and DNA-directed RNA ploymerase II second largest subunit (RPB2). Among them, F. fujikuroi accounted for 51.22% (42/82) and was isolated from 91.7% (11/12) soybean varieties. Pathogenicity assay showed that five Fusarium species were able to infect the seeds of soybean cultivar “Nandou12” and caused water-soaked or rot symptoms, while F. fujikuroi and F. asiaticum had much higher aggressiveness than other species with significant reductions of seed fresh weight and germination percentage. Accordingly, this study indicates that Fusarium species are the dominant seedborne fungi in the intercropped soybean in Sichuan, China, and this provides some useful references for the effective management of seedborne fungal diseases as well as soybean resistance breeding in maize/soybean relay strip intercropping.

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Seed-Borne Mycoflora and Their Management

Ilyas

Manohara²

2023

Plant Mycobiome

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Fusarium verticillioides inoculum potential influences soybean seed quality

Cited by 12 publications

References 12 publications

Maize/Soybean Relay Strip Intercropping Reduces the Occurrence of Fusarium Root Rot and Changes the Diversity of the Pathogenic Fusarium Species

Maize/Soybean Relay Strip Intercropping Reduces the Occurrence of Fusarium Root Rot and Changes the Diversity of the Pathogenic Fusarium Species

Diversity of the Seedborne Fungi and Pathogenicity of Fusarium Species Associated with Intercropped Soybean

Seed-Borne Mycoflora and Their Management

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