We can now pinpoint with great accuracy the crops being affected by the Xf pathogen rather than by other environmental causes before any symptoms appear. Swansea University researcher Alberto Hornero said: “This new research is a step forward in large scale hyperspectral screening for Xf detection. The Swansea University team mainly focussed on the development and setting up of the radiative transfer models used to collect the plant traits retrieval, and also participated in the field work and airborne data collection. The research published in Nature Communications led by Professor Pablo Zarco-Tejada (UoM and CSIC), reveals that new aerial large-scale plant crop scanning methods can achieve up to 92% accuracy in detecting Xf and could be key to successfully to containing or even eradicating it. Using advanced imaging technology, known as hyperspectral imagery, and thermal imaging they found it could detect infectious plant diseases caused by the Xf pathogen before symptoms became visible. Swansea University researchers from Department of Geography were part of an international team of experts from the University of Salford, the University of Melbourne (UoM), the Spanish National Research Council (CSIC), and the European Commission that scanned one million infected and healthy trees in seven regions across Europe. Outside America and Europe, the spread of this pathogen in Asia and Israel has intensified international calls to contain this global Xf epidemic. The plant kingdom produces a diverse array of chemicals, collectively making an estimated 10 5 to 10 6 different metabolites 1,2.These compounds are either known or likely to have important ecological functions, for example, in providing protection against herbivores, pests, and pathogens in allelopathy (competition with neighboring plants) and in shaping the plant microbiome. The Xf pathogen seriously disrupts agriculture production - in the olive sector alone it has led to losses of up €5.2 billion per year. However, the Xylella fastidiosa (Xf) pathogen is arguably the greatest threat to crops, causing dieback, browning and loss of leaves, reduced fruit size and death and is a threat to at least 550 species worldwide. Virulent diseases which devastate food crops like coffee, almond, citrus and grapevines with serious global economic and environmental consequences, could be controlled by large-scale aerial scanning, says new collaborative research involving Swansea University.Įach year, plant pathogens causing disease result in an estimated 16% production loss globally - a level that has not significantly reduced over the last 40 years despite increased pesticide use. Its 4,061,186-bp genome contains an estimated 3853 protein-coding sequences and the 1155 genes of XF-1 are. In particular, it is especially highly efficient at controlling the clubroot disease of cruciferous crops. Image: Trees showing increasing signs of disease severity. Bacillus subtilis XF-1 is a gram-positive, plant-associated bacterium that stimulates plant growth and produces secondary metabolites that suppress soil-borne plant pathogens.
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