Magenta and white Digitalis purpurea flowers

Deciphering the genetic bassis of flower color differences in Digitalis purpurea

Digitalis purpurea (Foxglove) is known for an intense purple/magenta flower color. However, some years ago, we observed white flowers. Immediately, the question arose regarding the genetic cause for this difference. The color is very likely due to anthocyanins. Therefore, we suspected a blockade in the anthocyanin biosynthetic pathway. But which gene could have been disrupted by a mutation in plants with white flowers? This mystery has now been solved by Katharina, Ronja, and Jakob through sequencing the genome of D. purpurea. A comparison of the genomes of plants with purple/magenta flowers against the genomes of plants with white flowers revealed a significant difference: white plants carry a large insertion in a gene encoding an anthocyanidin synthase. The loss of this gene could block the biosynthesis of anthocyanins. Further details of our analyses are described in a preprint on bioRxiv.


PBB group at Christmas Party 2023

PBB Christmas party 2023

The Christmas party last Friday was the festive highlight of a very successful week. In the lovingly decorated social room, we enjoyed a variety of delicious treats and spent a lovely evening. There was even a Christmas tree and a visit from Santa Claus (Benni), who distributed the gifts for our 'Schrottwichteln' (a fun gift exchange).


Bürgerpreis für Corinna

Corinna Thoben receives award for outstanding achievements

Corinna Thoben was awarded a prize for outstanding achievements during her bachelor's studies. Key factors for this award were her excellent academic performance and her social commitment, particularly in conveying basic biological principles to students. Additional details about the award ceremony and backgrounds are provided in an article in the TU Magazin.


PuckerLab at Christmas market 2023

Visiting the Christmas market 2023

On December 1st, we visited the Christmas market in the historical city center of Braunschweig. There was mulled wine, bratwurst, and many other delicious treats.


Ronja Friedhoff & Susanna Pape presenting the iGEM2023 project Li+onSwitch

Final iGEM2023 presentation

Ronja Friedhoff and Susanna Pape gave a final presentation about the iGEM2023 project Li+onSwitch at the BRICS. Interested relatives, students, and faculty had the opportunity to learn details about the project and to ask questions. This event celebrated the team's excellent achievements: Best Diagnostics Project, Top 10 Teams, and a Gold Medal. We wish the entire team much success in their future projects!

Samar Sheat visit

Cassva research in collaboration with Samar Sheat (DSMZ)

Today, Samar Sheat presented her cassava research in the AG Winter (DSMZ) to a group of students at TU Braunschweig. Cassava is an important crop grown on several continents. Samar is currently looking for resistance genes against viral infections that are currently destroying yields. Support is needed for this research. Interested students are welcome to get in touch.


iGEM2023 team TU-Braunschweig featured in various media

The huge success of the iGEM2023 team of TU Braunschweig is featured in various media (some in German):


TU Magazin



Investigating plant specialized metabolism through genomics and applied bioinformatics

Talk in DSMZ colloquium

Boas gave at talk with the title "Investigating plant specialized metabolism through genomics and applied bioinformatics" in the joined colloquium of DSMZ and JKI.


Huge success at Synthetic Biology competition (iGEM)

Our iGEM2023 team won the 'Best Diagnostics' award and a gold medal. Additionally, the team was nominated for the 'Best Composite Part' award. The project Li+onSwitch aiming at the quantification of lithium levels in blood samples convinced the judges at the Grand Jamboree in Paris. A detailed description of the project is available in the team wiki. Moreover, there are several videos about the team's project: project promotion video.


Interested in Synthetic Biology? We are recruiting a new team for an exciting project: SynBio @ TU Braunschweig.

Absolvententag 2023

Graduation Day 2023

On 3rd November 2023, biology and biotechnology students at TU Braunschweig received their graduation certificates. Huge congratulations to Melina, Sina and Benni for earning a Bachelor of Science degree in biology!

Pioneer of Genomes

Talk in seminar "Innovations from biotechnological research - trends and techniques that shape the future"

Boas gave a talk with the title "Pioneer in Genomes" in the seminar "Innovations from biotechnological research - trends and techniques that shape the future" at Bielefeld University and discussed carrier options with students.


no-iGEM Infoveranstaltung 2023

no-iGEM 2024 information events

We are offering some information events for students interested in synthetic biology. The aim is to enable a student team to work on a synbio project during the next months. Students who are interested, but cannot participate, are asked to send an email.



Ecki Wohlgehagen Foundation supports molecular biology education at TU Braunschweig

The Ecki Wohlgehagen Foundation has supported the purchase of a new thermocycler for molecular biology experiments at the TU Braunschweig. With this device, reaction mixtures can be incubated under a variety of precisely controlled temperatures. This is important for controlling molecular reactions and the activity of enzymes. The spectrum of possible applications ranges from routine methods such as PCR for amplification of DNA molecules to sample preparation for modern nanopore sequencing.

The board of trustees of the Ecki Wohlgehagen Foundation, represented by Mr. Wohlgehagen and Mr. Smyrek, visited the AG Pucker laboratories and had the new device and various possible applications explained to them. “Through the support of the Ecki Wohlgehagen Foundation, we can provide students with practical experience in the use of state-of-the-art laboratory methods and thus ensure the high level of life science education at the TU Braunschweig,” says Prof. Dr. Boaz Pucker.

Life science students use this device in courses on plant molecular biology and genomics. The iGEM team at TU Braunschweig also benefits from this new acquisition because additional capacity for DNA replication has been created. “The thermal cycler was very helpful for our iGEM project because we had to carry out a particularly large number of clonings and PCRs,” says Corinna Thoben from the iGEM team at TU-Braunschweig 2023. “DNA amplification and the combination of different pieces of DNA via PCR provides "The basis for many applications in synthetic biology," adds Ronja Friedhoff, who is also a member of the iGEM team. In the future, other students will work on their synthetic biology projects with this device. Among other things, projects are planned to produce glowing plants to create the targeted introduction of the necessary genes. Students should use this thermal cycler to prepare their samples for nanopore sequencing in courses on plant genome sequencing.

The Ecki Wohlgehagen Foundation is managed in trust by the Braunschweig Community Foundation and supports numerous educational measures.

Exploring biosynthesis pathways in fungi and plants

Talk in workshop "Microbial Interactions in the Phytosphere"

Boas gave a talk with the title "Exploring biosynthesis pathways in fungi and plants" as part of the workshop "Microbial Interactions in the Phytosphere" and discussed future projects with researchers of different institutions.

Boas at inaugural lecture

Inaugural lecture

On 10th October, Boas introduced himself and the research of the group to Faculty 2 during an inaugural lecture. Title of the lecture was "Big data-driven discoveries in the specialized plant metabolism". Selected research projects of the group were presented around three methods (comparative genomics, coexpression, applied bioinformatics). Afterwards, there was plenty of time for questions and discussions at the buffet.


Jen und Sarah in the TU Magazine

Jen and Sarah share their internship experiences in the TU Magazine.


Farewell to Michael and Jen

This week, Michael and Jen left our group to continue their studies at their home universities. Michael is now working at Uni Marburg to earn his doctoral degree. Jen is back at UC San Diego to complete her undergraduate studies. Michael performed an amazing coexpression analysis on Arabidopsis thaliana data to identify novel genes in the anthocyanin biosynthesis. Many thanks for the excellent help in setting up the lab and also supporting the iGEM teams in 2022 and 2023! Jen studied cacao genomes to understand their specific properties. All the best for the future!

Boas presenting comparative genomics projects at the DBG section meeting biodiversity and evolution 2023

DBG section meeting biodiversity & evolution 2023

Boas presented some research of the group in his talk about comparative genomics at the section meeting biodiversity & evolution 2023 in Gießen. It was a successful meeting with many fruitful discussions, which might lead to future collaborations. The photo shows a figure from a study about the evolution of the Apiaceae FNS I (Pucker & Iorizzo, 2023).

Pictures of Urtica dioica (stinging nettle)

Presentation about the anthocyanin biosynthesis in stinging nettle (Urtica dioica)

Lena Fürstenberg examined the anthocyanin biosynthesis in the stinging nettle (Urtica dioica) for her bachelor's thesis. The medicinal plant of the year 2022 is renowned for producing various flavonoids, including anthocyanins. These compounds are formed in response to stress and accumulated within the plant, resulting in an intense red coloring of the leaves. The findings of this study were presented and discussed with the research group.

Genome sequence of Rheum nobile published

Rheum nobile grows in the Himalayas and is famous for its adaptation to the extreme conditions at high altitudes. The plant has an outer layer of leaves that serve for insulation and protection against UV radiation. This helps to increase the temperature inside the plant and safeguard the vital parts of the plant from the harmful effects of UV radiation. The genome sequence of Rheum nobile has now been published by Feng, Pucker, Kuang et al., 2023, providing an important foundation for understanding the biology of this species.

New BioInfTool server is online

Our new BioInfTool server is online and allows the use of various bioinformatics tools without any installation. Through a web browser, genes involved in flavonoid biosynthesis can be identified in new plant species, or transcription factor families can be investigated. We welcome feedback and suggestions for additional tools that we should include in the future. Many thanks to Andreas Rempel and de.NBI for their excellent support!

Boas Pucker presenting at LUH

Visit at University of Hannover

Boas visited the research group Biochemistry of Plant Specialised Metabolites (University of Hannover) and enjoyed numerous discussions about biotechnology and specialized metabolism in plants. As part of a seminar, various projects for omics-based elucidation of biosynthetic pathways were presented. Many thanks for the invitation and the amazing time in Hannover!

direct RNA sequencing

RNA sequencing via MinION

We have performed direct RNA sequencing using our MinION. Melina extracted RNAs from flower samples of an aquatic plant. Melina and Benni prepared these RNAs for sequencing by creating complementary cDNA and attaching adaptors. After quality control, sequencing was performed on an R9 flow cell using one of our MinIONs. The length distribution shows an average read length of several hundred nucleotides, as many mRNAs are quite short. These data will provide an important foundation for gene identification. Many exciting experiments using this technology are planned!


Release of the bHLH_annotator

As part of her Bachelor thesis, Corinna Thoben developed a tool for the automatic identification and annotation of bHLH transcription factors in the genome sequences of plants. A corresponding preprint was just published on bioRxiv: Automatic annotation of the bHLH gene family in plants. The bHLH_annotator is freely available via GitHub.


iGEM2023 presentation

Project presentation by iGEM team 2023

Today, the iGEM team 2023 of TU Braunschweig presented the plan for their project Li+onSwitch in a public talk in the BRICS. All interested members of TU Braunschweig and other research institutes in Braunschweig participated. Ronja and Susanna gave an excellent talk. Additional updates will be shared through the team's website.

Data Literacy teaching materials available through Twillo

All teaching materials of our  "Data Literacy in Genome Research" course are now available through  Twillo. The development of this course is funded by the Stiftung Innovation in der Hochschullehre. All files are available on github, but we hope for an increased visibility through  Twillo. Additional information about this teaching innovation are available on the DaLiP website.


Zeitungsartikel über iGEM-Team 2023

iGEM-Team 2023 in newspaper

Our iGEM team TU Braunschweig 2023 was interviewed by the local newspaper. Now, you can find the content of that interview in the published newspaper article (in German).

Plant Biotechnology and Bioinformatics


We did a group trip and went bowling. It was a funny evening with many surprises.


LMU Munich visit 2023

Visit at LMU Munich

Boas visited the research group Systematics, Biodiversity and Evolution of Plants (LMU Munich) and enjoyed numerous discussions about the evolution of biosynthesis pathways. The invited talk covered our recent projects about the evolution of biosynthesis pathways with a focus on genomics. Plants in the greenhouses of the Botanical Garden Munich-Nymphenberg are impressive. Many thanks for the invitation and the great time in Munich!


Visit at University of Hohenheim

Boas visited the research group Physiology of Yield Stability (University of Hohenheim) and enjoyed inspiring discussions about the biosynthesis of specialized metabolites. The invited talk covered the recent insights into the mutual exclusion of anthocyanins and betalains in the Caryophyllales. Many thanks for the invitation and the excellent organisation!

BHB newsletter

iGEM-Team TU Braunschweig 2022 in BHB newsletter

The experiences and success of the iGEM team TU Braunschweig 2022 were summarized in the newsletter of the Braunschweiger Hochschulbunds (BHB) (in German) by Christian Köcher. Please find details about the 'LionDetect' project there.

Christmas party

We enjoyed a nice evening with snacks, waffles, and drinks.


Visiting the Christmas market in Braunschweig

On Friday evening, we enjoyed the Christmas market in the historic city center of Braunschweig. The relaxed atmosphere, hot wine punch, and tasty food facilitated conversations between the group members.

Barbecue in the dark

Last barbecue in 2022?

Due to the nice weather we decided to have a last barbecue in 2022. There is always something to celebrate and this is a great opportunity for exchange in the team.

Pitaya gene expression

Mutual exclusion of anthocyanins and betalains in plant pigmentation

For over 50 years, researchers have investigated the red, yellow, and blue pigments of plants in the Caryophyllales. Only plants in this order can have betalains, while most other land plants are pigmented by anthocyanins. However, the betalain-pigmented Caryophyllales plants do not accumulate anthocyanins. Recent studies by Fan et al., 2020 (now retracted) and Zhou et al., 2020 claimed that anthocyanins would contribute to the pigmentation of red pitayas. We previously addressed issues in the Fan et al., 2020 paper in our response (Pucker et al., 2022). Now, the paper by Zhou et al., 2020 was addressed by two correspondence articles just published in BMC Genomics. Both refute the contribution of anthocyanins to pigmentation in pitaya:

Pucker, B., Brockington, S.F. The evidence for anthocyanins in the betalain-pigmented genus Hylocereus is weak. BMC Genomics 23, 739 (2022).

Khan, M.I. The reported colour formation mechanism in pitaya fruit through co-accumulation of anthocyanins and betalains is inconsistent and fails to establish the co-accumulation. BMC Genomics 23, 740 (2022).

If you are interested in this topic, please have a look at these recent publications: Timoneda et al., 2019, Sheehan et al., 2020, and Pucker et al., 2022.

Shakunthala Natarajan

Shakunthala shares her experiences

Shakunthala shares her experiences in Germany in a recent blog post. A particular focus is on her research experiences in our group at TU Braunschweig.

RISE project offer

DAAD RISE project offer

Maria offers a project with the title

Unwrapping the wonders of chocolate: from candy to functional food

for international students as part of the RISE program of the DAAD. Please contact Maria directly if you are interested in additional details. Would you like to apply? You can do this through the DAAD portal. Here is the project code: Braunschweig_BI_CH_4798.


Long read sequencing in plant genomics blog entry

Blog post about future of long read sequencing in plant genomics

Here is the blog post about the future of long read sequencing in plant genomics: "From finding flavonoids to the ‘dark matter’ of T-DNA insertions — investigating plant genomes with nanopore sequencing".


Talk about long read sequencing applications in plant genomics

Boas was invited to give a talk about applications of long read sequencing in plant genomics as part of the APBioNET seminar series.


Python for Life Scientists

Python for Life Scientists

Life science students learnt the basis of Python3 and completed several application exercises. Slides and materials are available via github. Students can expressed there interest in taking this course in the future can send an email to Boas Pucker.


Benni, Melina, und Victoria-Seerose

Research on Victoria

Melina and Benni (s. photo) are excited about the flower color change of Victoria spec. They collected samples during the summer of 2022 and would like to investigate these in detail to understand the molecular mechanisms. Therefore, they are collecting support through a crowd funding project at betterplace.


de.NBI Cloud enables Next Generation Plant Science

Many thanks to de.NBI for excellent support! Our research would not be possible without de.NBI. The details are described in a testimonial on the de.NBI website.


Publications 09/2022

International collaborations resulted in publications

Successful (international) collaborations resulted in three new publications:

  • Busche M., Pucker B., Weisshaar B., Stracke R. Three R2R3-MYB transcription factors from banana (Musa spp.) activate structural anthocyanin biosynthesis genes as part of an MBW complex. bioRxiv 2022.08.15.503939; doi:
  • Rajput, R., Tyagi, S., Naik, J. et al. The R2R3-MYB gene family in Cicer arietinum: genome-wide identification and expression analysis leads to functional characterization of proanthocyanidin biosynthesis regulators in the seed coat. Planta 256, 67 (2022). doi:10.1007/s00425-022-03979-z.
  • Mengist MF, Grace MH, Mackey T, Munoz B, Pucker B, Bassil N, Luby C, Ferruzzi M, Lila MA and Iorizzo M (2022) Dissecting the genetic basis of bioactive metabolites and fruit quality traits in blueberries (Vaccinium corymbosum L.). Front. Plant Sci. 13:964656. doi: 10.3389/fpls.2022.964656.




Support for innovative teaching ("Freiraum2022")

A proposal for "Freiraum 2022" received very positive evaluations and funding. As of September 2022, we are preparing several courses around 'plant genomics' and 'data literacy'. More details are available here (in German).


Boas @ Botaniktagung 2022 (Bonn)

Presentation at International Conference of the German Society for Plant Sciences 2022 in Bonn

Boas Pucker gave a presentation at International Conference of the German Society for Plant Sciences 2022 in Bonn. Topic of this talk were molecular mechanisms that explain mutual exclusion of anthocyanins and betalains in the Caryophyllales. This involved KIPEs which was important for the identification of anthocyanin biosynthesis genes.



We enjoyed the nice weather in our beautiful garden. The visit of a future Master student, Michael, was an excellent reason for a barbecue.

Simplified KIPEs workflow

KIPEs3 preprint is online

We released an updated version of KIPEs on our web server. The changes between KIPEs3 and the original KIPEs version are described in a prepint:

bioRxiv preprint

KIPEs paper

KIPEs github repository

ONT sequencing status

ONT sequencing of plant genomes started

We started the sequencing of two plant genomes. The picture shows the state of nanopores during the sequencing process. Green indicates that the nanopores are active and sequence DNA strands. First analysis of the datasets are promising. More details about this innovative sequencing technology are available in our recent review article.



New group picture

We used the nice weather to take a new group picture.

iGEM2022 TU_Braunschweig TU Magazin article

iGEM-Team TU_Braunschweig 2022 im TU Magazin

A recent article in TU Magazin reports about the iGEM team TU_Braunschweig 2022, which is working on the laboratories of our group. The endless possibilities of an iGEM participation are highlighted in this article.

iGEM official logo

iGEM team TU_Braunschweig 2022 registered

The iGEM team TU_Braunschweig 2022 is now officially registered for the competition. iGEM is a synthetic biology competition for student teams from around the world. Teams of TU Braunschweig participated very successfully in 2013 and 2014.

MYB_annotator web server screenshot

Web server for bioinformatic tools is online

Our bioinformatic tools (MYB_annotator & KIPEs) are now available through a web server. This web server enables researchers without any bioinformatic skills to benefit from these tools. Files with sequences are uploaded to start the analysis. Once the analysis is completed, a compressed archive of all result files will be offered for download. Currently, the choices of parameters are restricted. The addition of other tools is in progress.

Simplified illustration of the flavonoid transport routes in a plant cell

Review article about flavonoid transport

We summarized the current knowledge about the transport of flavonoids in a review article. This process revealed that there are numerous gaps in the available knowledge. Our review was already available as a preprint and is now published in Plants.


Oxford Nanopore Technologies' and Pacific Biosciences' long read sequencing technologies

Review article about latest sequencing technologies

We wrote a review article about the development and current state of long read sequencing technologies with focus on plant genomics. This review covers the sequencing technologies provided by ONT and PacBio as well as applications of these technologies. Future challenges of plant genomics are presented.


Read mapping and variant calling workflow

Editor's Choice: Comparison of Read Mapping and Variant Calling Tools for the Analysis of Plant NGS Data

Our publication "Comparison of Read Mapping and Variant Calling Tools for the Analysis of Plant NGS Data" was selected by the Editor as one of the promising and important studies in the field. We compared different bioinformatic tools for the alignment of reads against a reference sequence and the following identification of sequence differences.

iGEM official logo


We are currently informing students at TU Braunschweig about the opportunity to participate in iGEM, the international competition for synthetic biology. More details are available here: iGEM (in German).


Appointment as junior professor: Boas Pucker (m.) with President Prof. Angela Ittel and Prof. Christoph Jacob, Dean of the Faculty of Life Sciences. Photo credit: Markus Hörster/TU Braunschweig

Interview in TU Magazin

An interview with Boas Pucker was published under the title "In Search of Drug Candidates in the Plant Genome" in the TU Magazin.


Publications in October

In October, the results of three projects were published as preprints on bioRxiv:

  • Pucker B (2021). Automatic identification and annotation of MYB gene family members in plants. bioRxiv 2021.10.16.464636; doi: 10.1101/2021.10.16.464636.
  • Sielemann K, Pucker B, Schmidt N, Viehoever P, Weisshaar B, Heitkam T, Holtgraewe D (2021). Complete pan-plastome sequences enable high resolution phylogenetic classification of sugar beet and closely related crop wild relatives. bioRxiv 2021.10.08.463637; doi: 10.1101/2021.10.08.463637.
  • Movahedi A, Wei H, Pucker B, Sun W, Li W, Yang L, Zhuge Q (2021). Regulation of poplar isoprenoid biosynthesis by methylerythritol phosphate and mevalonic acid pathways interactions. bioRxiv 2020.07.22.216804; doi: 10.1101/2020.07.22.216804.

BRICS membership

Boas Pucker was accepted as member of the Braunschweig Integrated Centre of Systems Biology (BRICS) on the 11th October 2021.


Pucker Lab opens in October 2021

Environmental Challenges

Since the 1st October 2021, the group is located at the TU Braunschweig in the Institute of Plant Biology (Mendelssohnstrasse 4). Details about research and resulting publications are available on the dedicated pages.

Email Newsletter

News regarding the group can be retrieved automatically via email. This includes open positions, publications, and other important events. Please click on the link below and enter your email address on the next page to subscribe/unsubscribe.




Offer accepted

The offer to start a group with focus on Plant Biotechnology and Bioinformatics was accepted in spring 2021. There will be a PhD position available. Stay tuned for updates!