All plant-interacting microbes must acquire metabolites from their hosts to satisfy nutritional demands for growth. With carbon being crucial for all organisms, sufficient acquisition of sugars from plants is a cardinal task of plant pathogens for successful invasion. Blocking access to host sugars seems to be a promising strategy to control plant diseases. Plant sugar retrieval strengthens plant resistance to pathogens (Yamada et al., 2016). However, it is difficult to discriminate if this is a result of blocking the pathogen's access to sugar, or a disturbance in sugar-mediated signaling in plants (Milne et al., 2019; Moore et al., 2015). Since the identification of UfHXT1 provided the first evidence of sugar uptake in rust fungi (Voegele et al., 2001), many sugar transporters have been identified from different pathogenic fungi (Saitoh et al., 2014; Schuler et al., 2015). However, the effects of sugar starvation on pathogen growth, development and pathogenicity are still unclear.This article is protected by copyright. All rights reserved.
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