In 2024 and 2025, Plant Synthetic Genomics emerged as a recognised field in Europe, with the UK ARIA agency committing £62.4M to the Synthetic Plants programme across nine funded teams. The narrative that will attach to this field — who started it, where, when, and on what intellectual basis — is not yet settled. This document provides a factual account, grounded in primary source documents with verifiable dates, tracing the origins of Plant Synthetic Genomics as an active research programme in Europe to Heinrich Heine University Düsseldorf, where it was started by Uriel Urquiza-García and a group of BSc and MSc students with a seed fund from the Cluster of Exellence on Plant Sciences (CEPLAS) November 2022.

The account does not argue that Düsseldorf is the only place where relevant work is happening. It documents, with primary sources, that a named, funded, institutionally recognised programme called "Plant Synthetic Genomics" was operating here before the field had a name in any funding agency or national programme. That temporal fact matters for the historical record, without documentation of primary sources this will be go into ovlivion.

On 11 November 2022, Uriel Urquiza-García submitted a grant application to the CEPLAS Steering Committee at HHU Düsseldorf. The application was titled "Laying the foundations for plant synthetic genomics by creating a Plant Artificial Chromosome in Physcomitrium patens." Budget: €23,602. It was awarded by the steering committee on 25 November 2022.

This application contains the earliest known institutional use of the phrase "Plant Synthetic Genomics" as the name of a funded research programme in Europe [unless contested by others]. The three work packages — establishing genomic and synthetic biology tools in the chosen model organism, characterising the chromosomal elements required for artificial chromosome construction, and assembling and testing a synthetic chromosome body — describe the same core technical challenges that ARIA's Synthetic Plants programme would organise a national consortium to address twenty-two months later.

The application also contains a career narrative section explicitly stating: "I identified synthetic genomics as a promising area in which I could develop a competitive line of research... Synthetic genomics is in an early stage in higher eukaryotes, especially bottom-up approaches. The seed fund will allow pioneer work in the area." This is a contemporaneous, verified claim of pioneer status — written in November 2022 and awarded by an independent committee.

The following table places the Düsseldorf programme in relation to other significant events in the field, with verified dates where available.

Prehistory: Edinburgh, 2016–2017. The earliest documented engagement with plant synthetic genomics as a research direction predates the institutional programme by approximately six years. During Uriel's doctoral training at the University of Edinburgh — where the primary research focus was quantitative modelling of the plant circadian clock under Prof. Andrew Millar — an independent line of thinking developed around the idea of using chromosome-scale synthetic biology to test fundamental questions in plant biology. This was not a direction initiated by the PhD supervisor.

A correspondence archive from December 2016 to March 2017 documents collaborative experimental work with Yue (Chantal) Shen, then at the Genome Synthesis and Editing Platform, China National GeneBank (CNGB), BGI-Research, Shenzhen — the same Chinese synthetic genomics infrastructure that would later be part of the ecosystem producing the SynMoss project. The work involved designing and cloning plant metabolic pathway genes with NanoLuciferase fusions for plant transformation, with explicit discussion of bottlenecks in plant synthetic genomics. An email from 10 January 2017 states: "you will see what are going to be the bottle necks for doing synthetic genomics. But It's an amazing endeavour!!"

The NanoLuciferase approach used in this 2017 experimental work is the same bioluminescence-based quantification strategy used as a core measurement tool in the MSB 2025 paper (absolute protein quantification of clock components) and subsequently in the Düsseldorf programme's chromosome engineering work. The methodological lineage is continuous.

The organising scientific question. The question that now organises the programme — whether the circadian clock is modular with respect to genomic context, or whether its function depends on its native chromosomal architecture — crystallised over several years of doctoral and postdoctoral work. It was not answerable with the tools available during the PhD. Answering it required a synthetic chromosome or tools to restructure clock genes programatically. That requirement drove the subsequent programme design.

The chassis insight. The choice of Physcomitrium patens as the experimental chassis was made after two years of attempting alternative large-DNA assembly strategies that proved insufficient. The moss was selected because its native homologous recombination efficiency — unusually high among plants — makes large-DNA integration tractable in a way it is not in other plant species. This insight preceded the broader community's recognition of moss as a suitable chassis; it was arrived at independently, from first principles, after direct experimental failure with the standard approaches.

Two traceable lineages. The programme has two intellectual lineages that converge in the JTF grant "Bottling Time": Edinburgh (quantitative clock biology, absolute protein quantification, the organising scientific question) and Düsseldorf (synthetic chromosome assembly, light-inducible control systems, centromere engineering). The 2016–2017 Edinburgh correspondence represents the earliest documented point at which these two lineages were being simultaneously pursued — clock biology and synthetic genomics — by the same person, independently of the official PhD research direction.

Between August 2021 and December 2025, 16 BSc and MSc students were supervised in the programme across two research pillars: precision molecular control (light-inducible gene regulation) and synthetic chromosome engineering. The two pillars are connected — control tools developed in the first pillar became instruments used in the second.

The table below lists all students with their thesis title, type, and document date.

Rows highlighted in green indicate Plant Synthetic Genomics pillar. The seven highlighted theses collectively cover: genomic infrastructure; standardised part library; programmable chromosome identity targeting; large-DNA assembly methodology and design automation; large-DNA integration into the P. patens genome; centromere histone tagging and quantification; synthetic telomere design. Three of the seven students (Andrejic, Finkenrath, Petrova) are co-authors on the RepTiles preprint (bioRxiv, Feb 2025), with Petrova as first author.

The following presentations and publications constitute the dissemination record of the programme, with documented dates and venues.

The following table summarises the groups now working in adjacent areas, their approach, organism, and publicly stated goals, alongside the Düsseldorf programme.