Coffee Leaf Rust Resistance: An Overview

Guerra-Guimarães, Leonor; Diniz, Inês; Azinheira, Helena Gil; Loureiro, Andreia; Pereira, Ana Paula; Tavares, Sílvia; Batista, Dora; Várzea, Vítor; Silva, Maria do Céu Lavado da

doi:10.1007/978-3-662-67273-0_2

Cited by 2 publications

(1 citation statement)

References 95 publications

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“…The primary strategy to control this disease in coffee-producing countries has been using resistant cultivars. However, the description of more than 50 physiological races described globally, from which 16 races of this pathogen have already been reported in Brazil (Zambolim 2016; Guerra- Guimarães et al 2023), hinders the fast and timely release of new and improved cultivars. Therefore, developing new strategies to enhance the resistance of coffee plants to H. vastatrix is essential to its control.…”

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Expression profiling of galactinol synthase genes in Coffea arabica L. in response to Hemileia vastatrix infection

Santos,

Yaguinuma,

Baba

et al. 2024

Preprint

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Galactinol synthase (GolS; EC 2.4.1.123) is an enzyme that plays crucial roles in various plant species under different stress conditions. Few studies have evaluated the expression of the galactinol synthase (GolS) gene under biotic stress conditions. Here, we report the transcriptional profiles of galactinol synthase genes (CaGolS) and RFOs (Raffinose Family of Oligosaccharides) abundance in two contrasting cultivars of Coffea arabica L. (IAPAR59, resistant and Catuaí Vermelho IAC 99, susceptible) infected with Hemileia vastatrix (coffee leaf rust), one of the most destructive fungal diseases in coffee crops worldwide. RT-qPCR results showed distinct transcriptional regulation of three CaGolS genes in leaves infected with H. vastatrix race II at 0, 12, 24, and 48 h post-inoculation. CaGolS1 was upregulated (12 and 24 h) in response to the pathogen infection in the susceptible genotype, while CaGolS2 was downregulated in both genotypes at all sampling times, notably in the susceptible one. CaGolS3 showed a very weak expression level in the leaves of the susceptible genotype. The findings of this study justify further research into the association of RFOs with the response of Arabica coffee plants to H. vastatrix infection using a large panel of resistant and susceptible genotypes.

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confidence: 99%

Expression profiling of galactinol synthase genes in Coffea arabica L. in response to Hemileia vastatrix infection

Santos,

Yaguinuma,

Baba

et al. 2024

Preprint

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Climatic Favorability to the Occurrence of Hemileia vastatrix in Apt Areas for the Cultivation of Coffea arabica L. in Brazil

Rizzo Moreira,

Rosa dos Santos,

Polonini Moreli

et al. 2024

Climate

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In Brazil, coffee leaf rust (CLR), caused by the fungus Hemileia vastatrix, was first detected in Coffea arabica in January of 1970 in southern Bahia. Now widespread across all cultivation areas, the disease poses a significant threat to coffee production, causing losses of 30–50%. In this context, the objective of this study was to identify and quantify the different classes of occurrence of CLR in areas apt and restricted to the cultivation of Arabica coffee in Brazil for a more informed decision regarding the cultivar to be implanted. The areas of climatic aptitude for Arabica coffee were defined, and then, the climatic favorability for the occurrence of CLR in these areas was evaluated based on climatic data from TerraClimate from 1992 to 2021. The apt areas, apt with some type of irrigation, restricted, and with some type of restriction for the cultivation of Arabica coffee add up to 16.34% of the Brazilian territory. Within this 16.34% of the area of the Brazilian territory, the class of climatic favorability for the occurrence of CLR with greater representation is the favorable one. Currently, the disease is controlled with the use of protective and systemic fungicides, including copper, triazoles, and strobilurins, which must be applied following decision rules that vary according to the risk scenario, and according to the use of resistant cultivars. This study provides a basis for choosing the most suitable cultivars for each region based on the degree of CLR resistance.

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Coffee Leaf Rust Resistance: An Overview

Cited by 2 publications

References 95 publications

Expression profiling of galactinol synthase genes in Coffea arabica L. in response to Hemileia vastatrix infection

Expression profiling of galactinol synthase genes in Coffea arabica L. in response to Hemileia vastatrix infection

Climatic Favorability to the Occurrence of Hemileia vastatrix in Apt Areas for the Cultivation of Coffea arabica L. in Brazil

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