Epidemiological Significance of Crown Rot in the Fruiting Field in Relation to <i>Colletotrichum gloeosporioides</i> Infection of Strawberry Nursery Plants

Rahman, M.; Louws, Frank J.

doi:10.1094/pdis-06-16-0802-re

Cited by 4 publications

(3 citation statements)

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“…Colletotrichum spp., causing anthracnose, poses a devastating threat to various crops globally, and extensive research indicates that Colletotrichum is a major pathogen in strawberry fields. Anthracnose is likely to occur throughout the growth cycle of strawberries ( Curry et al, 2002 ; Rahman and Louws, 2017 ). The increased Colletotrichum relative abundance could be a significant factor triggering strawberry disease.…”

Section: Discussionmentioning

confidence: 99%

Rhizosphere microbial ecological characteristics of strawberry root rot

Zhang,

Kong,

et al. 2023

Front. Microbiol.

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IntroductionStrawberry (Fragaria × ananassa Duch.) holds a preeminent position among small fruits globally due to its delectable fruits and significant economic value. However, strawberry cultivation is hampered by various plant diseases, hindering the sustainable development of the strawberry industry. The occurrence of plant diseases is closely linked to imbalance in rhizosphere microbial community structure.MethodsIn the present study, a systematic analysis of the differences and correlations among non-culturable microorganisms, cultivable microbial communities, and soil nutrients in rhizosphere soil, root surface soil, and non-rhizosphere soil of healthy and diseased strawberry plants affected by root rot was conducted. The goal was to explore the relationship between strawberry root rot occurrence and rhizosphere microbial community structure.ResultsAccording to the results, strawberry root rot altered microbial community diversity, influenced fungal community composition in strawberry roots, reduced microbial interaction network stability, and enriched more endophytic-phytopathogenic bacteria and saprophytic bacteria. In addition, the number of bacteria isolated from the root surface soil of diseased plants was significantly higher than that of healthy plants.DiscussionIn summary, the diseased strawberry plants changed microbial community diversity, fungal species composition, and enriched functional microorganisms significantly, in addition to reshaping the microbial co-occurrence network. The results provide a theoretical basis for revealing the microecological mechanism of strawberry root rot and the ecological prevention and control of strawberry root rot from a microbial ecology perspective.

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Section: Discussionmentioning

confidence: 99%

Rhizosphere microbial ecological characteristics of strawberry root rot

Zhang,

Kong,

et al. 2023

Front. Microbiol.

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“…Colletotrichum gloeosporioides is a necrotrophic fungi that causes Colletotrichum crown rot (CCR) of strawberry ( Fragaria × ananassa ), which is an important disease in Florida and throughout the southeastern United States. The necrotic infections in crown tissues cause necrosis, plant collapse, and death in hot and humid conditions ( MacKenzie et al, 2006 ; Rahman and Louws, 2017 ). Most commercial cultivars currently grown in the United States are susceptible to CCR and, thus, economic losses occur nearly every season from this disease.…”

Section: Introductionmentioning

confidence: 99%

“…Most commercial cultivars currently grown in the United States are susceptible to CCR and, thus, economic losses occur nearly every season from this disease. Both curative (pyraclostrobin, strobilurins, and azoxystrobin) and preventive (captan) fungicides are commonly used to control CCR, but chemical controls are not very effective once plants become infected ( MacKenzie et al, 2009 ; Rahman and Louws, 2017 ). The use of resistant varieties would be the most robust and economically viable way to control this disease.…”

Section: Introductionmentioning

confidence: 99%

Comparative Transcriptome Analysis to Identify Candidate Genes for FaRCg1 Conferring Resistance Against Colletotrichum gloeosporioides in Cultivated Strawberry (Fragaria × ananassa)

Chandra

Han

et al. 2021

Front. Genet.

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Colletotrichum crown rot (CCR) caused by Colletotrichum gloeosporioides is a serious threat to the cultivated strawberry (Fragaria × ananassa). Our previous study reported that a major locus, FaRCg1, increases resistance. However, the genomic structure of FaRCg1 and potential candidate genes associated with the resistance remained unknown. Here, we performed comparative transcriptome analyses of resistant ‘Florida Elyana’ and susceptible ‘Strawberry Festival’ after infection and identified candidate genes potentially involved in resistance. In ‘Florida Elyana’, 6,099 genes were differentially expressed in response to C. gloeosporioides. Gene ontology analysis showed that the most upregulated genes were functionally associated with signaling pathways of plant defense responses. Three genes in the genomic region of FaRCg1 were highly upregulated: a von Willebrand Factor A domain-containing protein, a subtilisin-like protease, and a TIFY 11A-like protein. Subgenome-specific markers developed for the candidate genes were tested with a diverse panel of 219 accessions from University of Florida and North Carolina State University breeding programs. Significant and positive associations were found between the high-resolution melting (HRM) marker genotypes and CCR phenotypes. These newly developed subgenome-specific functional markers for FaRCg1 can facilitate development of resistant varieties through marker-assisted selection.

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Fungal Pathogens Associated with Strawberry Crown Rot Disease in China

Zhang¹,

Hu³

et al. 2022

JoF

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Strawberry crown rot (SCR) is a serious disease that is generally referred to as seedling anthracnose due to its association with Colletotrichum spp. Presently, SCR is the main cause of death of strawberry seedlings. However, management strategies, including fungicides targeting Colletotrichum spp., have failed to obtain satisfactory results. Therefore, identifying the exact pathogen species causing SCR could guide its management. A total of 287 isolates were obtained from SCR-diseased plants. Based on the culture, morphology, and phylogenetic characteristics, the above 287 fungal isolates of SCR pathogens were identified as 12 different species, including Colletotrichum siamense, C. fructicola, Fusarium oxysporum, F. commune, F. equiseti, F. solani, F. tricinctum, Epicoccum sorghinum, Stemphylium lycopersici, Clonostachys rosea, Phoma herbarum, and Curvularia trifolii. Pathogenicity results showed that most isolates were pathogenic to strawberry seedlings and exhibited different degrees of virulence. In severe cases, poor growth on the ground, yellowing of the leaves, and even death of seedlings occurred. In mild cases, only black disease spots appeared on the stems of the strawberry seedlings, and a few withered leaves became necrotic. The inoculation experiments showed that the most virulent species were C. siamense and F. oxysporum, followed by F. equiseti, P. herbarum, Cl. rosea, S. lycopersici, and C. fructicola, which had disease incidences above 50%. E. sorghinum, S. lycopersici, Cl. rosea, P. herbarum and Cu. trifolii were reported to cause SCR for the first time herein. In conclusion, SCR is a sophisticated disease caused by a diversity of pathogenic fungi. This work provides new valuable data about the diversity and pathogenicity of SCR pathogens, which will help in formulating effective strategies to better control of the SCR disease.

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Epidemiological Significance of Crown Rot in the Fruiting Field in Relation to Colletotrichum gloeosporioides Infection of Strawberry Nursery Plants

Cited by 4 publications

References 38 publications

Rhizosphere microbial ecological characteristics of strawberry root rot

Rhizosphere microbial ecological characteristics of strawberry root rot

Comparative Transcriptome Analysis to Identify Candidate Genes for FaRCg1 Conferring Resistance Against Colletotrichum gloeosporioides in Cultivated Strawberry (Fragaria × ananassa)

Fungal Pathogens Associated with Strawberry Crown Rot Disease in China

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