Inheritance of resistance to cotton blue disease

Pupim, Osmério; Schuster, Ivan; Pinto, Ronald Barth; Pires, E. V.; Bélot, Jean-Louis; Silvie, Pierre; Chitarra, L. G.; Hoffmann, Lúcia Vieira; Barroso, Paulo Augusto Vianna

doi:10.1590/s0100-204x2008000500015

Cited by 16 publications

(4 citation statements)

References 4 publications

(4 reference statements)

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“…Interaction between the virus and host also contributes to the resistance dynamic reported in the cotton-CLRDV pathosystem. Upon the rise of CBD in Brazil, deploying cultivars with a single dominant resistance gene, Rghv1, effectively mitigated the disease (Junior et al, 2008). However, varieties carrying a single dominant resistance gene, Cbd (Fang et al, 2010), became susceptible to CLRDV-at in Argentina (Agrofoglio et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

A newly isolated cotton-infecting Polerovirus with cryptic pathogenicity encodes a weak suppressor of RNA silencing

Akinyuwa¹,

Price²,

Martin³

et al. 2023

Front. Agron.

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Cotton is a multipurpose crop grown globally, including the United States. Cotton leafroll dwarf virus (CLRDV), a phloem-limited virus (Solemoviridae) transmitted by aphids, causes significant economic losses to cotton cultivation. CLRDV strains (CLRDV-typical and atypical) that were previously prevalent in other countries cause severe symptoms leading to high yield loss. Recently, a new isolate of CLRDV (CLRDV-AL) has been characterized from infected cotton plants in Alabama that are often asymptomatic and difficult to detect, implying a low titer and pathogenicity within the host. Different pathogenicity among certain strains within the same species often correlates with both environmental and molecular factors. Thus, better management and control of the vector-borne disease can be achieved by elucidating host-pathogen interaction, such as host immune response and pathogen counter-response. In this study, we demonstrate the ability of CLRDV-AL to suppress a major host defense response known as RNA silencing and compare the potency of silencing suppression to other strains of the same virus. Also, we discuss the difference in pathogenicity among them by evaluating the observations based on the amino acid variation within the functional domain. Our study provides and suggests a future direction for specifying the strategy to mitigate potential cotton disease severity.

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Section: Discussionmentioning

confidence: 99%

A newly isolated cotton-infecting Polerovirus with cryptic pathogenicity encodes a weak suppressor of RNA silencing

Akinyuwa¹,

Price²,

Martin³

et al. 2023

Front. Agron.

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“…CBD was effectively mitigated in South America by deploying varieties possessing a single dominant resistance gene, Rghv1 (Pupim Junior et al, 2008 ). Morello et al ( 2010 ) developed BRS‐293, a midseason high‐yielding cultivar that is moderately resistant to typical and atypical CLRDV but was found to be susceptible to the prevalent CLRDV in the south‐eastern United States (Brown et al, 2019 ).…”

Section: Disease Managementmentioning

confidence: 99%

Cotton leafroll dwarf disease: An enigmatic viral disease in cotton

Edula

Bag

Milner

et al. 2023

Molecular Plant Pathology

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Taxonomy: Cotton leafroll dwarf virus (CLRDV) is a member of the genus Polerovirus, family Solemoviridae. Geographical Distribution: CLRDV is present in most cotton‐producing regions worldwide, prominently in North and South America. Physical Properties: The virion is a nonenveloped icosahedron with T = 3 icosahedral lattice symmetry that has a diameter of 26–34 nm and comprises 180 molecules of the capsid protein. The CsCl buoyant density of the virion is 1.39–1.42 g/cm3 and S20w is 115–127S. Genome: CLRDV shares genomic features with other poleroviruses; its genome consists of monopartite, single‐stranded, positive‐sense RNA, is approximately 5.7–5.8 kb in length, and is composed of seven open reading frames (ORFs) with an intergenic region between ORF2 and ORF3a. Transmission: CLRDV is transmitted efficiently by the cotton aphid (Aphis gossypii Glover) in a circulative and nonpropagative manner. Host: CLRDV has a limited host range. Cotton is the primary host, and it has also been detected in different weeds in and around commercial cotton fields in Georgia, USA. Symptoms: Cotton plants infected early in the growth stage exhibit reddening or bronzing of foliage, maroon stems and petioles, and drooping. Plants infected in later growth stages exhibit intense green foliage with leaf rugosity, moderate to severe stunting, shortened internodes, and increased boll shedding/abortion, resulting in poor boll retention. These symptoms are variable and are probably influenced by the time of infection, plant growth stage, varieties, soil health, and geographical location. CLRDV is also often detected in symptomless plants. Control: Vector management with the application of chemical insecticides is ineffective. Some host plant varieties grown in South America are resistant, but all varieties grown in the United States are susceptible. Integrated disease management strategies, including weed management and removal of volunteer stalks, could reduce the abundance of virus inoculum in the field.

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“…The following supporting information can be downloaded at: , Section S1: Number of aphids used for CLRDV- transmission; Section S2: Plants inoculated by viruliferous and non-viruliferous aphids; Section S3: CLRDV host range; Section S4: CLRDV detection from seeds of hosts; Section S5: Relative quantitation of CLRDV P1 gene in plant hosts. Table S1: Number of aphids used for CLRDV transmission from virus-infected to non-infected cotton plants; Table S2: Number of CLRDV-inoculated plant samples; Table S3: Seeds of CLRDV hosts tested for the presence of virus; Table S4: List of primers used for CLRDV P1 and host actin genes; Figure S1: Photographs of CLRDV-inoculated and mock-inoculated plants 21 days post aphid-mediated inoculation; Figure S2: Normalized abundance of CLRDV P1 in relation with the housekeeping gene [ 61 , 62 , 63 , 64 , 65 ].…”

mentioning

confidence: 99%

Prospective Alternate Hosts of an Emerging Polerovirus in Cotton Landscapes in the Southeastern United States

Pandey

Bag

Roberts

et al. 2022

Viruses

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The identification of alternate hosts that can act as virus inoculum sources and vector reservoirs in the landscape is critical to understanding virus epidemics. Cotton leafroll dwarf virus (CLRDV) is a serious pathogen in cotton production and is transmitted by the cotton/melon aphid, Aphis gossypii, in a persistent, circulative, and non-propagative manner. CLRDV was first reported in the United States in Alabama in 2017, and thereafter in several cotton-producing states. CLRDV has since established itself in the southeastern United States. The role of alternate hosts in CLRDV establishment is not clear. Fourteen common plant species in the landscape, including crops, weeds, and ornamentals (cotton, hollyhock, marshmallow, country mallow, abutilon, arrowleaf sida, okra, hibiscus, squash, chickpea, evening primrose, henbit, Palmer amaranth, and prickly sida) were tested as potential alternate hosts of CLRDV along with an experimental host (Nicotiana benthamiana) via aphid-mediated transmission assays. CLRDV was detected following inoculation in hibiscus, okra, N. benthamiana, Palmer amaranth, and prickly sida by RT-PCR, but not in the others. CLRDV accumulation determined by RT-qPCR was the highest in N. benthamiana compared with cotton and other hosts. However, aphids feeding on CLRDV-infected prickly sida, hibiscus, and okra alone were able to acquire CLRDV and back-transmit it to non-infected cotton seedlings. Additionally, some of the alternate CLRDV hosts supported aphid development on par with cotton. However, in a few instances, aphid fitness was reduced when compared with cotton. Overall, this study demonstrated that plant hosts in the agricultural landscape can serve as CLRDV inoculum sources and as aphid reservoirs and could possibly play a role in the reoccurring epidemics of CLRDV in the southeastern United States.

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Inheritance of resistance to cotton blue disease

Cited by 16 publications

References 4 publications

A newly isolated cotton-infecting Polerovirus with cryptic pathogenicity encodes a weak suppressor of RNA silencing

A newly isolated cotton-infecting Polerovirus with cryptic pathogenicity encodes a weak suppressor of RNA silencing

Cotton leafroll dwarf disease: An enigmatic viral disease in cotton

Prospective Alternate Hosts of an Emerging Polerovirus in Cotton Landscapes in the Southeastern United States

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