Modelling the progress of Asiatic citrus canker on Tahiti lime in relation to temperature and leaf wetness

Christiano, R. S. C.; Pria, Maristella Dalla; Jesús, Waldir Cintra de; Amorim, Lílian; Filho, Armando Bergamin

doi:10.1007/s10658-008-9389-8

Cited by 25 publications

(12 citation statements)

References 19 publications

(23 reference statements)

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“…An extension of the Beta function was fitted by non-linear regression to condial germination, appressorium formation and melanisation (Bassanezi et al 1998;Christiano et al 2009…”

Section: Resultsmentioning

confidence: 99%

Colletotrichum gloeosporioides, a new causal agent of citrus post-bloom fruit drop

et al. 2011

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Citrus post-bloom fruit drop (caused by Colletotrichum acutatum) frequently occurs in the southwestern region of São Paulo State, Brazil. A survey of Colletotrichum isolates associated with symptoms of post-bloom fruit drop in São Paulo State showed C. gloeosporioides in addition to C. acutatum. The objectives of this study were to confirm the identification of C. gloeosporioides isolated from symptomatic citrus flowers, to test the pathogenicity of C. gloeosporioides isolates, to compare the development of disease caused by C. gloeosporioides and C. acutatum, and to determine the frequency of C. gloeosporioides in a sample of isolates obtained from symptomatic flowers in different regions of São Paulo State. Through the use of species-specific primers by PCR, 17.3% of 139 isolates were C. gloeosporioides, and the remaining 82.7% were C. acutatum. The pathogenicity tests, carried out in 3-year old potted plants of sweet oranges indicated that both species caused typical symptoms of the disease including blossom blight and persistent calyces. Incubation periods (3.5 and 3.9 days, respectively, for C. acutatum and C. gloeosporioides) and fruit sets (6.7 and 8.5%, respectively for C. acutatum and C. gloeosporioides) were similar for both species. The incidences of blossom blight and persistent calyces were higher on plants inoculated with C. acutatum than in those inoculated with C. gloeosporioides. Conidial germination was similar for both species under different temperatures and wetness periods. Under optimal conditions, appressorium formation and melanisation were higher for C. gloeosporioides than for C. acutatum. These results indicated that Colletotrichum gloeosporioides is a new causal agent of post-bloom fruit drop.

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“…An extension of the Beta function was fitted by non-linear regression to condial germination, appressorium formation and melanisation (Bassanezi et al 1998;Christiano et al 2009…”

Section: Resultsmentioning

confidence: 99%

Colletotrichum gloeosporioides, a new causal agent of citrus post-bloom fruit drop

et al. 2011

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“…Xanthomonas spp. thrive better on slightly higher temperatures (on average 25-35 • C) and are capable to reach high enough inoculum in the host to allow dispersal (Christiano et al 2009;Morales et al 2018a;2018b). In addition, high humidity was found to be required for epiphytic survival and transmission (Christiano et al 2009).…”

Section: Environmental Factorsmentioning

confidence: 98%

“…thrive better on slightly higher temperatures (on average 25-35 • C) and are capable to reach high enough inoculum in the host to allow dispersal (Christiano et al 2009;Morales et al 2018a;2018b). In addition, high humidity was found to be required for epiphytic survival and transmission (Christiano et al 2009). In this condition, the high abundance of bacteria on the surface area of a infected host will be a more significant inoculum source for dispersal, while, in parallel, the same condition will contribute to epiphytic survival of the bacteria upon arrival to a leaf of a new host.…”

Section: Environmental Factorsmentioning

confidence: 99%

Mechanistic insights into host adaptation, virulence and epidemiology of the phytopathogenXanthomonas

Potnis

Dow

et al. 2019

FEMS Microbiology Reviews

160

134

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Xanthomonas is a well-studied genus of bacterial plant pathogens whose members cause a variety of diseases in economically important crops worldwide. Genomic and functional studies of these phytopathogens have provided significant understanding of microbial-host interactions, bacterial virulence and host adaptation mechanisms including microbial ecology and epidemiology. In addition, several strains of Xanthomonas are important as producers of the extracellular polysaccharide, xanthan, used in the food and pharmaceutical industries. This polymer has also been implicated in several phases of the bacterial disease cycle. In this review, we summarise the current knowledge on the infection strategies and regulatory networks controlling virulence and adaptation mechanisms from Xanthomonas species and discuss the novel opportunities that this body of work has provided for disease control and plant health.

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“…When temperatures or inoculum levels are low, symptoms can take 2 months or more to manifest (Schubert et al, 2001). When temperatures exceed 40 8C, symptoms typically do not develop on sweet orange, but develop on Tahiti lime, given sufficient leaf wetness duration (Christiano et al, 2009;Dalla Pria et al, 2006). Prolonged leaf wetness increases the severity of CC in sweet orange and lesion development in Tahiti lime (Christiano et al, 2009;Dalla Pria et al, 2006).…”

Section: Epidemiologymentioning

confidence: 99%

Recent advances in the understanding of Xanthomonas citri ssp. citri pathogenesis and citrus canker disease management

Ference

Gochez²,

Behlau

et al. 2018

Molecular Plant Pathology

118

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Taxonomic status: Bacteria; Phylum Proteobacteria; Class Gammaproteobacteria; Order Xanthomonadales; Family Xanthomonadaceae; Genus Xanthomonas; Species Xanthomonas citri ssp. citri (Xcc). Host range: Compatible hosts vary in their susceptibility to citrus canker (CC), with grapefruit, lime and lemon being the most susceptible, sweet orange being moderately susceptible, and kumquat and calamondin being amongst the least susceptible. Microbiological properties: Xcc is a rod-shaped (1.5-2.0 × 0.5-0.75 µm), Gram-negative, aerobic bacterium with a single polar flagellum. The bacterium forms yellow colonies on culture media as a result of the production of xanthomonadin. Distribution: Present in South America, the British Virgin Islands, Africa, the Middle East, India, Asia and the South Pacific islands. Localized incidence in the USA, Argentina, Brazil, Bolivia, Uruguay, Senegal, Mali, Burkina Faso, Tanzania, Iran, Saudi Arabia, Yemen and Bangladesh. Widespread throughout Paraguay, Comoros, China, Japan, Malaysia and Vietnam. Eradicated from South Africa, Australia and New Zealand. Absent from Europe.

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Modelling the progress of Asiatic citrus canker on Tahiti lime in relation to temperature and leaf wetness

Abstract: The combined effect of temperature (15°C,

Cited by 25 publications

References 19 publications

Colletotrichum gloeosporioides, a new causal agent of citrus post-bloom fruit drop

Colletotrichum gloeosporioides, a new causal agent of citrus post-bloom fruit drop

Mechanistic insights into host adaptation, virulence and epidemiology of the phytopathogenXanthomonas

Recent advances in the understanding of Xanthomonas citri ssp. citri pathogenesis and citrus canker disease management

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