scholarly journals Insights Into Triticum aestivum Seedling Root Rot Caused by Fusarium graminearum

2015 ◽  
Vol 28 (12) ◽  
pp. 1288-1303 ◽  
Author(s):  
Qing Wang ◽  
Stefanie Vera Buxa ◽  
Alexandra Furch ◽  
Wolfgang Friedt ◽  
Sven Gottwald
Keyword(s):  
Triticum Aestivum ◽  
Life Cycle ◽  
Fusarium Graminearum ◽  
Root Rot ◽  
Fungal Pathogens ◽  
Resistance Breeding ◽  
Root Infection ◽  
Head Blight ◽  
Root Rot Disease ◽  
Rot Disease

Fusarium graminearum is one of the most common and potent fungal pathogens of wheat (Triticum aestivum), known for causing devastating spike infections and grain yield damage. F. graminearum is a typical soil-borne pathogen that builds up during consecutive cereal cropping. Speculation on systemic colonization of cereals by F. graminearum root infection have long existed but have not been proven. We have assessed the Fusarium root rot disease macroscopically in a diverse set of 12 wheat genotypes and microscopically in a comparative study of two genotypes with diverging responses. Here, we show a ‘new’ aspect of the F. graminearum life cycle, i.e., the head blight fungus uses a unique root-infection strategy with an initial stage typical for root pathogens and a later stage typical for spike infection. Root colonization negatively affects seedling development and leads to systemic plant invasion by tissue-adapted fungal strategies. Another major outcome is the identification of partial resistance to root rot. Disease severity assessments and histological examinations both demonstrated three distinct disease phases that, however, proceeded differently in resistant and susceptible genotypes. Soil-borne inoculum and root infection are considered significant components of the F. graminearum life cycle with important implications for the development of new strategies of resistance breeding and disease control.

scholarly journals Biological control of Phaseolus vulgaris and Pisum sativum root rot disease using Trichoderma species

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Hammad Abdelwanees Ketta ◽  
Omar Abd El-Raouf Hewedy
Keyword(s):  
Phaseolus Vulgaris ◽  
Pisum Sativum ◽  
Common Bean ◽  
Root Rot ◽  
Fungal Pathogens ◽  
Plant Diseases ◽  
Root Rot Disease ◽  
Pea Root ◽  
Rot Disease ◽  
Pea Root Rot

Abstract Background Root rot pathogens reported to cause considerable losses in both the quality and productivity of common bean (Phaseolus vulgaris L.) and pea (Pisum sativum L.). It is an aggressive crop disease with detriment economic influence caused by Fusarium solani and Rhizoctonia solani among other soil-borne fungal pathogens. Destructive plant diseases such as root rot have been managed in the last decades using synthetic pesticides. Main body Seeking of economical and eco-friendly alternatives to combat aggressive soil-borne fungal pathogens that cause significant yield losses is urgently needed. Trichoderma emerged as promising antagonist that inhibits pathogens including those inducing root rot disease. Detailed studies for managing common bean and pea root rot disease using different Trichoderma species (T. harzianum, T. hamatum, T. viride, T. koningii, T. asperellum, T. atroviridae, T. lignorum, T. virens, T. longibrachiatum, T. cerinum, and T. album) were reported both in vitro and in vivo with promotion of plant growth and induction of systemic defense. The wide scale application of selected metabolites produced by Trichoderma spp. to induce host resistance and/or to promote crop yield, may represent a powerful tool for the implementation of integrated pest management strategies. Conclusions Biological management of common bean and pea root rot-inducing pathogens using various species of the Trichoderma fungus might have taken place during the recent years. Trichoderma species and their secondary metabolites are useful in the development of protection against root rot to bestow high-yielding common bean and pea crops.

scholarly journals An Endophytic Strain of Bacillus amyloliquefaciens Suppresses Fusarium oxysporum Infection of Chinese Wolfberry by Altering Its Rhizosphere Bacterial Community

2022 ◽  
Vol 12 ◽  
Author(s):  
Constantine Uwaremwe ◽  
Liang Yue ◽  
Yun Wang ◽  
Yuan Tian ◽  
Xia Zhao ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Fusarium Oxysporum ◽  
Root Rot ◽  
Bacillus Amyloliquefaciens ◽  
Fungal Pathogens ◽  
Metagenomic Sequencing ◽  
Lycium Barbarum ◽  
Root Rot Disease ◽  
Rot Disease ◽  
Biocontrol Strain

Root rot disease is a serious infection leading to production loss of Chinese wolfberry (Lycium barbarum). This study tested the potential for two bacterial biological control agents, Bacillus amyloliquefaciens HSB1 and FZB42, against five fungal pathogens that frequently cause root rot in Chinese wolfberry. Both HSB1 and FZB42 were found to inhibit fungal mycelial growth, in vitro and in planta, as well as to promote the growth of wolfberry seedlings. In fact, a biocontrol experiment showed efficiency of 100% with at least one treatment involving each biocontrol strain against Fusarium oxysporum. Metagenomic sequencing was used to assess bacterial community shifts in the wolfberry rhizosphere upon introduction of each biocontrol strain. Results showed that HSB1 and FZB42 differentially altered the abundances of different taxa present and positively influenced various functions of inherent wolfberry rhizosphere bacteria. This study highlights the application of biocontrol method in the suppression of fungal pathogens that cause root rot disease in wolfberry, which is useful for agricultural extension agents and commercial growers.

scholarly journals Efficacy of Trichoderma sp. to Control Lasiodiplodia theobromae, Casual Agent of Sweetpotato Root Rot Disease

2003 ◽  
Vol 3 (1) ◽  
pp. 61-73
Author(s):  
Manuel Palomar ◽  
◽  
Victoria Palermo
Keyword(s):  
Root Rot ◽  
Field Experiments ◽  
Microbial Control ◽  
Field Conditions ◽  
Systemic Fungicide ◽  
Root Infection ◽  
Lasiodiplodia Theobromae ◽  
Root Rot Disease ◽  
Trichoderma Sp ◽  
Rot Disease

Microbial control of sweetpotato root rot pathogen (Lasiodiplodia thebromae (Pat.) Griff. & Maubi.) was studied with the use of an antagonist (Trichoderma sp.) under screenhouse and field conditions. Application of 10-60g Trichoderma FI7c suppressed L. theobromae infection and reduced the incidence of root rotting during storage especially if applied two to three months after planting of sweetpotato in pots. Likewise, in field experiments, regardless of inoculum densities of Trichoderma FI7c (50, 75 and 100 g), root infection was reduced during storage when the antagonist was applied two and three months after planting than when applied during planting to one month. Control provided by Trichoderma FI7c was economically sound and even better compared to the effect of Benlate, a systemic fungicide.

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