Abstract
This Meeting Review article offers a synthesis of the science presented and discussed at the recently held 11th International Symposium on Leaf Surface Microbiology, also known as Phyllosphere 2022, at the University of California–Davis (UC Davis), 17 to 21 July 2022. Twice postponed due to Covid-19, this in-person conference covered wide-ranging but intersecting topics related to the microbiology of leaves (and other aboveground parts of plants), including phytopathology, food safety, plant physiology, microbial ecology, fluid physics, vegetation science, single-cell biology, canopy architecture, and human health. The overarching theme of the meeting (“understanding the rules of phyllospheric life”) was explored in 46 podium and 12 poster presentations. It also fueled the formal and informal discussions among 90-plus conference participants about existing and new questions in phyllosphere microbiology. Are there first principles underlying the acquisition, assembly and succession of microbial communities in the phyllosphere? How best to define, recognize, and exploit phyllosphere fitness of microscopic leaf dwellers? At what scales do or should we sample, interrogate, and understand the phyllosphere? What still needs to be learned that keeps us from new insights, resources, and tools to produce healthier or more nutritious plant foliage? Having the conference at UC Davis in the summer presented a unique opportunity to “vertically integrate” high school students from the COSMOS program into the Phyllosphere 2022 conference and allow face-to-face interactions with early-career scientists and prominent senior career professionals in phyllosphere microbiology. Students thus experienced first-hand the ways in which scientists address problems that affect society and seek understanding and solutions to those problems. It represented an effective approach to engage a younger generation into thinking about research and stewardship of plants and their foliage and, more generally, about the merits of a science career.
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