Elevated atmospheric CO2 concentration increases rice blast severity

Gória, Marina Meloni; Ghini, R.; Bettiol, W.

doi:10.1590/s1982-56762013005000010

Cited by 21 publications

(6 citation statements)

References 17 publications

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“…In a meta-analysis summarizing the response of rice yield to increased atmospheric CO 2 and O 3 concentrations, Ainsworth (2008) found that high CO 2 concentrations are anticipated to increase yield, while increased O 3 concentrations and elevated air temperature are anticipated to reduce yield. Other researchers have reported that elevated CO 2 concentrations are likely to increase the spread of rice blast [62][63][64][65]. Published results from simulation modeling research to predict the impact of climate change on rice blast are scarce; therefore, most assumptions are based on the epidemiology of the disease at specific temperature, humidity, and CO 2 levels [28].…”

Section: Impact Of Climate Change On Rice Productionmentioning

confidence: 99%

Rice Blast: A Disease with Implications for Global Food Security

2019

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Rice blast is a serious fungal disease of rice (Oryza sativa L.) that is threatening global food security. It has been extensively studied due to the importance of rice production and consumption, and because of its vast distribution and destructiveness across the world. Rice blast, caused by Pyricularia oryzae Cavara 1892 (A), can infect aboveground tissues of rice plants at any growth stage and cause total crop failure. The pathogen produces lesions on leaves (leaf blast), leaf collars (collar blast), culms, culm nodes, panicle neck nodes (neck rot), and panicles (panicle blast), which vary in color and shape depending on varietal resistance, environmental conditions, and age. Understanding how rice blast is affected by environmental conditions at the cellular and genetic level will provide critical insight into incidence of the disease in future climates for effective decision-making and management. Integrative strategies are required for successful control of rice blast, including chemical use, biocontrol, selection of advanced breeding lines and cultivars with resistance genes, investigating genetic diversity and virulence of the pathogen, forecasting and mapping distribution of the disease and pathogen races, and examining the role of wild rice and weeds in rice blast epidemics. These tactics should be integrated with agronomic practices including the removal of crop residues to decrease pathogen survival, crop and land rotations, avoiding broadcast planting and double cropping, water management, and removal of yield-limiting factors for rice production. Such an approach, where chemical use is based on crop injury and estimated yield and economic losses, is fundamental for the sustainable control of rice blast to improve rice production for global food security.

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Section: Impact Of Climate Change On Rice Productionmentioning

confidence: 99%

Rice Blast: A Disease with Implications for Global Food Security

2019

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“…The effect was less significant for cultivars with higher resistance to the pathogens tested ( Bencze et al., 2013 ; Váry et al., 2015 ; Cuperlovic-Culf et al., 2018 ). Concerning rice blast disease symptoms intensity, two FACE experiments on rice observed either an increase in symptom severity ( Gória et al., 2013 ) or in disease incidence ( Kobayashi et al., 2006 ). Although further studies are needed to decipher which components of immunity are responsible for the observed increase in susceptibility, our work has provided further evidence of links between hCO 2 and biotic stress responses in plants, paving the way for studies to establish the roles of components involved in Bd immunity within the context of climate change.…”

Section: Discussionmentioning

confidence: 99%

Impact of high atmospheric carbon dioxide on the biotic stress response of the model cereal species Brachypodium distachyon

Trémulot,

Macadré,

Gal

et al. 2023

Front. Plant Sci.

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Losses due to disease and climate change are among the most important issues currently facing crop production. It is therefore important to establish the impact of climate change, and particularly of high carbon dioxide (hCO2), on plant immunity in cereals, which provide 60% of human calories. The aim of this study was to determine if hCO2 impacts Brachypodium distachyon immunity, a model plant for temperate cereals. Plants were grown in air (430 ppm CO2) and at two high CO2 conditions, one that is relevant to projections within the coming century (1000 ppm) and a concentration sufficient to saturate photosynthesis (3000 ppm). The following measurements were performed: phenotyping and growth, salicylic acid contents, pathogen resistance tests, and RNAseq analysis of the transcriptome. Improved shoot development was observed at both 1000 and 3000 ppm. A transcriptomic analysis pointed to an increase in primary metabolism capacity under hCO2. Alongside this effect, up-regulation of genes associated with secondary metabolism was also observed. This effect was especially evident for the terpenoid and phenylpropanoid pathways, and was accompanied by enhanced expression of immunity-related genes and accumulation of salicylic acid. Pathogen tests using the fungus Magnaporthe oryzae revealed that hCO2 had a complex effect, with enhanced susceptibility to infection but no increase in fungal development. The study reveals that immunity in B. distachyon is modulated by growth at hCO2 and allows identification of pathways that might play a role in this effect.

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“…On average, high CO 2 concentrations will increase rice yields, but elevated temperatures and increased O 3 concentrations will dampen these effects. High concentrations of CO 2 are expected to increase blast spread [12][13][14].…”

Section: Editorialmentioning

confidence: 99%