The genus Phyllosticta includes both endophytic and phytopathogenic species that occur on a broad range of plant hosts, including Citrus. Some pathogenic species cause severe disease, such as Phyllosticta citricarpa, the causal agent of Citrus Black Spot (CBS). In contrast, other species, such as Phyllosticta capitalensis, have an endophytic lifestyle in numerous plant hosts. Carbon utilization capabilities are hypothesized to influence both host range and lifestyle, and are in part determined by the set of Carbohydrate Active Enzyme (CAZyme) encoding genes of a species. In this study, carbon utilization capabilities of five Phyllosticta species were determined, as well as the CAZyme repertoire (CAZome) encoded in their genomes. Little variation was found among species in terms of carbon utilization capabilities and CAZome. However, one of the tested carbon sources, sugar beet pulp (SBP), inhibited growth of the plant pathogens, also when combined with another carbon source, while endophytic species remained unaffected.

Phyllosticta属包括内生和植物病原物种，它们发生在广泛的植物宿主上，包括柑橘属植物。一些病原物种会导致严重的疾病，例如柑橘黑斑病(CBS) 的病原体 柑橘叶柄病 ( Phyllosticta citricarpa )。相比之下，其他物种，例如Phyllosticta capitalensis，在众多植物宿主中具有内生性生活方式。假设碳利用能力会影响宿主范围和生活方式，并且部分由编码一个物种的碳水化合物活性酶 (CAZyme) 的基因组决定。本研究中五种叶藻的碳利用能力确定了物种，以及它们基因组中编码的 CAZyme 库（CAZome）。在碳利用能力和 CAZome 方面，物种之间几乎没有变化。然而，一种被测试的碳源，甜菜浆 (SBP)，当与另一种碳源结合时，也会抑制植物病原体的生长，而内生物种不受影响。