2022​ - Issue 2

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Jun 23
Issue 2 • 2022
IS-MPMI members Dr. Greg Martin and Dr. Blake Meyers have earned membership in the prestigious U.S. National Academy of Sciences. NAS recognizes achievement in science by election to membership and, with the National Academy of Engineering and National Academy of Medicine, provides science, engineering, and health policy advice to the federal government and other organizations.
Photo: Carol M. Highsmith, public domain, via Wikimedia Commons
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Also in this issue...
Dr. Blake Meyers holds joint appointments at the Donald Danforth Plant Science Center
and the University of Missouri-Columbia. He has been widely recognized for his major research contributions in the field of disease resistance, small RNAs, and evolutionary biology. Dr. Ajayi Olaoluwa Oluwafunto recently interviewed Dr. Meyers, asking several questions related to his research, lab, and thoughts on various topics important to junior scientists.
On June 8 and 9, IS-MPMI held the first of two virtual Early Career Showcases to highlight the outstanding work being done by our junior members. The June showcase was moderated by Dr. Morgan Carter and Dr. Kevin Cox, featured the work of 15 graduate students and postdocs, and included discussions on a wide variety of topics.
Submit your paper by September 9, 2022, for the MPMI 2023 Focus Issue on the Plant Endomembrane System in Molecular Plant–Microbe Interactions.
Explore Recent MPMI Editor's Picks
Explore the Editor's picks from the March, April, and May issues of MPMI.
Registration is open for the upcoming APS Annual Meeting, Plant Health 2022, August 6–10, in Pittsburgh, PA. Don't miss this in-person meeting and the opportunity to network with plant pathologists. We hope you can join us for this exciting event!
We are always looking for content for Interactions. Please contact Interactions Editor-in-Chief Dennis Halterman with questions or article ideas.​

Jun 22
InterStellar: Dr. Martin and Dr. Meyers Elected to National Academy of Sciences
Photo: Carol M. Highsmith, public domain, via Wikime​dia Commons​​​

Two IS-MPMI members, Dr. Greg Martin and Dr. Blake Meyers, have earned membership in the prestigious U.S. National Academy of Sciences (NAS; The NAS is a private, nonprofit institution that was established under a congressional charter signed by President Abraham Lincoln in 1863. Currently, it has about 2,400 active members and 500 foreign associates. The NAS recognizes achievement in science by election to membership and, with the National Academy of Engineering and the National Academy of Medicine, provides science, engineering, and health policy advice to the federal government and other organizations.

Dr. Greg Martin

Dr. Martin is the Boyce Schulze Downey Professor at the Boyce Thompson Institute (BTI) and a professor in the School of Integrative Plant Science (SIPS) at Cornell University. At BTI, researchers in Dr. Martin's lab study the molecular basis of bacterial pathogenesis and the plant immune system. The long-term goal of his research is to use knowledge gained about the molecular basis of plant–pathogen interactions to develop plants with enhanced natural resistance to diseases. An InterView with Dr. Martin conducted by Haesong Kim from Pohang University of Science and Technology will be published in the September issue of Interactions.

Dr. Blake Meyers

Dr. Meyers is a principal investigator and member at the Donald Danforth Plant Science Center and professor at the University of Missouri-Columbia. Dr. Meyers' group leads development and application of high-throughput DNA sequencing technologies to make fundamental discoveries about the biology of plants, including mechanisms of disease resistance, function and regulation of genomes, epigenetic mechanisms, and regulatory RNA. You can read the InterView with Dr. Meyers conducted by Dr. Ajayi Olaoluwa Oluwafunto in this issue of Interactions.

Jun 22
InterView with Dr. Blake Meyers, Newly Elected Member of the National Academy of Sciences
Dr. Aj​ayi Olaoluwa Oluwafunto​

Dr. Blake Myers

Dr. Ajayi Olaoluwa Oluwafunto

Dr. Ajayi Olaoluwa Oluwafunto recently completed her Ph.D. degree from the University of Ibadan, Nigeria, and works in the Soil Microbiology unit of the International Institute of Tropical Agriculture, Ibadan, Nigeria. Her major research interest is in plant–microbe interactions, particularly in promoting the yield and health of legumes using plant growth-promoting bacteria, nitrogen-fixing bacteria, and molecular approaches.

​Dr. Blake Meyers is a senior member of IS-MPMI who holds joint appointments at the Donald Danforth Plant Science Center and the University of Missouri-Columbia. Dr. Meyers' current research emphasizes bioinformatics and plant functional genomics to understand the types of RNA they produce, particularly pollen and plant reproduction, gene regulation and small RNA, and secondary siRNAs in anther development, working in collaboration with scientists in other labs. He has been widely recognized for his major research contributions in the field of disease resistance, small RNAs, and evolutionary biology. He is an elected Fellow of the American Association for the Advancement of Science (AAAS) and the American Society of Plant Biology (ASPB). He became a reviewing editor at The Plant Cell in 2008 and then a senior editor in 2017. He was also recently elected to the National Academy of Sciences as a member of the 2022 class of inductees.


Dr. Meyers grew up in the college town of Williamsburg, where his father worked as a professor of English. His numerous adventures with nature in fields and outdoors helped him develop an early interest in plants and food production. He completed his undergraduate studies at the University of Chicago, and afterward, he had the opportunity to work on a team that had access to the most advanced DNA sequencing equipment in the field. He formed a second interest in genomic research during his M.S. and Ph.D. degree studies with Dr. Richard Michelmore at UC Davis, where he was funded by an NSF predoctoral fellowship focused on characterizing the diversity of nucleotide-binding, leucine-rich repeat (NB-LRR or NLR) disease-resistance genes in lettuce.

His first postdoctoral assignment was at Dupont-Pioneer (where he met his wife), and his second assignment was at the Michelmore lab, where his work focused on disease resistance genes. At the Michelmore lab, he manually re-annotated NLR-encoding genes for the then just released Arabidopsis thaliana Col-0 genome, the results of which were published in The Plant Cell (Meyers et al., 2003). His findings showed that the 150 Arabidopsis NLR genes often formed in segmentally duplicated clusters, similar to those in lettuce, and that the automated gene prediction tools misannotated nearly one-third of the NLR genes and still required human inputs.

Dr. Meyers began working as a faculty member at the University of Delaware in 2002, where his lab used multiple sequencing approaches to analyze mRNA and small RNAs. In 2005, with collaborator Pam Green, his lab was the first to perform large-scale, genome-wide analysis of small RNAs, and in 2008, the Green and Meyers labs codeveloped a new and widely adopted method for the genome-wide analysis of cleaved mRNAs. Dr. Meyers' career progressed rapidly at the University of Delaware, and he became the Edward F. and Elizabeth Goodman Rosenberg Professor of Plant and Soil Sciences in 2010. In 2012, he was named a Fellow of AAAS.

Dr. Meyers started his laboratory at the Donald Danforth Plant Science Center in 2016. Research at the Donald Danforth Center is focused on developing tools and resources to help breeders and farmers make agriculture more sustainable, reduce our dependence on water, protect the soil, and provide nutritious crops for communities around the world. The Meyers lab has developed and used a wide variety of bioinformatics tools and pipelines, provided a customized genome browser, and developed apps for analysis of small RNA targets, cleavage, etc., which are available to the public using their tools.

Dr. Meyers' lab group was the first to demonstrate the targeting of transcripts from NLR genes directly by microRNAs and indirectly through the production of “phased," short, interfering RNAs (phasiRNAs) (Zhai et al., 2011). Their work on phasiRNAs has identified roles in posttranscriptional control of numerous pathways, with much of their current work focused on understanding the functions and evolutionary history of two genetically separable pathways that are highly active in premeiotic and meiotic maize anthers (Zhai et al., 2015). Dr. Meyers copublished a seminal 2005 manuscript in Science, “Elucidation of the Small RNA Component of the Transcriptome," that has generated more than 2 million reads, providing the most expansive and detailed data set view of small RNAs in any plant, animal, or fungal species at the time.

I interviewed Dr. Meyers and asked several questions related to his research, lab, and thoughts on various topics important to junior scientists. I have summarized his responses in my own words, but you can read the direct responses from Dr. Meyers here​.

Interview Summary

Looking back over the years, when he was a younger scientist, like most graduate students, postdocs, and early-career scientists, Dr. Meyers felt the pressure to make progress on his projects, publish, and make a name for himself while balancing his personal life with work and a myriad of other things. During the early stages of his career, he felt that success was an uncertain thing, with moments of success that he was worried would be short-lived. He warns young scientists that there are a lot of decisions to be made along the way—which way to go, which goal to pursue, etc.—stating that success is a product of how you set and measure up to your own goals, plus some hard work to meet those goals and a measure of serendipity. He also tries to spend time doing things outside of work that he enjoys, although at certain times he has put more effort into work than he should have. Putting it in one piece of advice, he says that we should appreciate both failures and successes along the way for the learning moments that they represent. And, appreciate the great people we meet, the moments when good fortune occurs, and the remarkable career that we as scientists can have relative to many other professions.

When setting up his lab, about 10 or 20 years ago, he had to spend a lot of time finding and training people, working directly with them to build up systems for data management. He also had to juggle the many responsibilities of early-career faculty, including teaching and generating data for grant proposals, having to make tough decisions about where to focus his limited time, and building stories that would result in papers and good talks. These experiences have helped, and he can now do most tasks, such as writing and evaluation, much quicker than when he first started out. However, while there are aspects of the work that, over time, get quicker or easier, other tasks, such as mentoring, designing experiments, and thinking creatively, still take the same amount of time. He has found that selective investment of time early in your career can yield time savings later through greater efficiency and experience.

In recent years, Meyers says that he has also been fortunate to be able to attract and retain talented staff, postdocs, and research scientists with whom he can share the work of managing the group. This has allowed continuity and retained institutional memory of how things work, why things might fail, and who to go to when assistance is needed. This is all important to managing one's time, leaving him free to work on other things, as he can depend more on many people, from administrative assistants to academic staff. Meyers says that it is not him per se, but “all of us working as a team, and when it is a well-oiled operation, we are that much better," which is why they are a high-achieving and successful group. He also says they are a cohesive, collaborative group that works well together, which is important to success. He notes that a good personality is a winning trait, arguably even more so than technical skills among group members, and that when conflicts and complications occur within a group, or communication is poor, it slows things down.

Since he has a dependable team, Meyers' personal work revolves around his email inbox, as this is where he diligently manages his time. The emails in his inbox represent his “to do" list—as soon as he finishes a task, he files or deletes the email. Over the last couple of years, he has tried to keep his inbox to around 20 emails, at least as a regular weekly low point. He even hit the legendary “inbox zero" over the last winter holiday, which was the first time in over a decade. Jokingly, he commented that he would file the email for this interview, removing it from his to-do list as taken care of after the interview.

As an accomplished writer, he points out that experience is important for efficiently writing good publications and successful grant proposals. He provides a few tips that he also reminds his lab members about:

  • ​Write for a reader who does not know your work at all but has the ability to learn it quickly.
  • Pay close attention to the clarity of your text, avoiding hasty writing that comes off as sloppy.
  • Use good transitions, continuity, and logical flow by ensuring one sentence follows from the former and into the next.
  • Pay attention to the conclusions of paragraphs and sections to end on your strongest point made in that block of text; don't simply let the text fizzle out with a minor or tangential point.
  • Work with a mentor or instructor to critique your writing, or even read a few books on the topic, as there are many.

Meyers advises that when preparing a good paper there is a lot to think about at the submission/evaluation stage of publishing and that the inputs by reviewers should be greatly appreciated, as they help to improve your work. He also points out that there is a need to develop a thick skin, as you occasionally get reviewers who are mean, nitpicky, or just do not share your enthusiasm for the topic, and at such times, even if you are feeling irritated by a reviewer or editor, you should make sure you take an extra day or so to get over the emotions and purge your responses of adjectives or opinions—focusing on the science and keeping a neutral tone. It is also important to do as much extra work to address the comments as possible, as reviewers and editors appreciate it when you fix a concern and do not argue everything.

He points out that writing grant proposals is different in many ways from writing papers and requires good ideas along with preliminary data, which can sometimes take months (or years) to generate. In other words, you need to play the long game, building a story over time with the anticipation that you will be able to work it in as preliminary data for a proposal. That is what start-up funds are for, and even when you have a grant, you need to be thinking about the dual needs of addressing the objectives of the current funding while planning for the next round. All this has to be done while ensuring that your team has interesting projects that are going to yield publications. When asked this question, he said, “Now that you are asking me to think about it, it is kind of stressing me out, but in real life, it seems to work out but can take a lot of planning."

There are so many interesting areas within plant biology in which breakthroughs are needed and are likely to come. On the biological side, his interests continue to focus on small RNAs—how are they made, how they function, where they go, how different organisms exploit them for signaling, etc. For the last decade, his lab group has been working with collaborators, mainly the lab of Virginia Walbot at Stanford University, to determine why many flowering plants accumulate extraordinarily high levels of several classes of small RNAs in their anthers during pollen development. Understanding why this occurs and what those small RNAs are doing would be a major breakthrough. Being able to answer those questions is likely to require technical breakthroughs, including single-cell analysis of small RNAs and spatial transcriptomics of small RNAs, so these are also major (technical) breakthroughs to look forward to, whether from his lab or someone else's.

In the context of IS-MPMI, Meyers would also say that another major breakthrough would be to fully understand the small RNAs that mediate communication between plant hosts and their pathogens and symbiotic microbes. He states that only in recent years have we begun to characterize these RNAs, and there are many things yet to learn about the mechanism of movement, perception, and response, which will require several major breakthroughs, by many people in the field, perhaps with contributions by his group—although not his primary area of work, it is an exciting field in which he will be pleased to be involved.

Jun 22
IS-MPMI Hosts Junior Colleague Showcase
On June 8 and 9, IS-MPMI held the first of two virtual Early Career Showcases to highlight the outstanding work being done by our junior members. The June showcase was moderated by Dr. Morgan Carter, a postdoctoral scholar in the lab of Dr. David Baltrus at the University of Arizona in Tucson, and Dr. Kevin Cox, a Hanna Gray postdoctoral fellow in the lab of Dr. Blake Meyers at the Donald Danforth Plant Science Center in St. Louis, MO. The showcase featured the work of 15 graduate students and postdocs located around the world and included discussions on a wide variety of topics. The list of speakers and titles can be found on the Early Caree​r Showcase website.​

Following the presentations each day, the event included several breakout rooms for discussions on various topics important to junior members. These included the following topics:

  • "Navigating the Scientific Jungle Gym—Career Options for Scientists," hosted by Dennis Halterman (U.S. Department of Agriculture, USA) and Tessa Burch-Smith (Donald Danforth Plant Science Center, USA)
  • "Securing Your Own Funding—Insights to Fellowships and Grants," hosted by Patricia Baldrich (Donald Danforth Plant Science Center, USA)
  • "Identifying Questions and Leads to Chase—Scientific Intuition," hosted by Roger Innes (Indiana University, USA) and Kevin Cox (Donald Danforth Plant Science Center, USA)
  • "Caring for Yourself—Work–Life Balance and Well-being," hosted by Charles Roussin-Léveillée (University of Sherbrooke, Canada) and Mary Beth Mudgett (Stanford University, USA
  • "Building Skills and Relationships—Effective Networking," hosted by Adam Bogdanove (Cornell University, USA) and Morgan Carter (University of Arizona, USA).

The second Early Career Showcase will be held on September 20 and 21. Registration is free for IS-MPMI members. Register today!

Jun 22
Call for Papers for the MPMI 2023 Focus Issue!

Submit your paper by September 9, 2022! Learn more about the scope of the MPMI 2023 Focus Issue on the Plant Endomembrane System in Molecular Plant–Microbe Interactions and submit your manuscript for consideration. Focus Issue Guest editors are H. Jin, E. Park, A. Wang, and D. Wang.

Jun 22
Explore Recent MPMI Editor's Picks!


Two Related Picks from the MPMI Editors: We've studied rhizobia and legumes for a long time, and here we highlight two Editor's Picks that are beginning to address a whole new field: positive effects on nonhost plant growth and development by rhizobia. Both the Mercedes Schroeder et al. and the Casandra Hernández-Reyes et al. papers identify specific mechanisms by which symbiotic rhizobium bacteria promote the root growth of a nonhost, Arabidopsis, altering root architecture via auxin transport (Schroeder et al.) and modulating cell division and cell elongation via NLP-mediated nitrate signaling (Hernández-Reyes et al.).​

Bradyrhizobium japonicum IRAT FA3 Alters Arabidopsis thaliana Root Architecture via Regulation of Auxin Efflux Transporters PIN2, PIN3, PIN7, and ABCB19

Mercedes M. Schroeder, Melissa Y. Gomez, Nathan McLain, and Emma W. Gachomo

Plant root development changes in response to beneficial rhizobacteria. This MPMI paper by Schroeder et al. shows B. japonicum's influence on host transcriptional reprogramming during their beneficial interaction. Through bacterial association with knockout lines, plant auxin efflux transporters were identified as critical to developing the B. japonicum-modified root architecture.

NIN-Like Proteins: Interesting Players in Rhizobia-Induced Nitrate Signaling Response During Interaction with Non-Legume Host Arabidopsis thaliana

Casandra Hernández-Reyes, Elisabeth Lichtenberg, Jean Keller, Pierre-Marc Delaux, Thomas Ott, and Sebastian T. Schenk

As an essential macronutrient, nitrogen plays an important role in plant development and plant–microbe symbioses, including legume–rhizobia interactions. Hernández-Reyes et al. demonstrate that a nitrate-related NLP signaling pathway in Arabidopsis regulates rhizobium-induced lateral root growth and increased root hair length and density. The involvement of two NLP transcription factors in mediating this response and their similarity to known legume NLPs involved in nodule symbiosis suggests the response to rhizobia is a trait shared within that protein clade.


Analysis of Outer Membrane Vesicles Indicates That Glycerophospholipid Metabolism Contributes to Early Symbiosis Between Sinorhizobium fredii HH103 and Soybean

Dongzhi Li, Ziqi Li, Jing Wu, Zhide Tang, Fuli Xie, Dasong Chen, Hui Lin, and Youguo Li

Gram-negative bacteria can produce outer membrane vesicles (OMVs), and most functional studies of OMVs have been focused on mammalian-bacterial interactions. Research on the OMVs of rhizobia is limited. In this work, Dhongzhi Li et al. isolated and purified OMVs from Sinorhizobium fredii HH103 under free-living conditions that were set as control (C-OMVs) and symbiosis-mimicking conditions that were induced by genistein (G-OMVs).


Synergistic Effects of a Root-Endophytic Trichoderma Fungus and Bacillus on Early Root Colonization and Defense Activation Against Verticillium longisporum in Rapeseed

Fatema Binte Hafiz, Narges Moradtalab, Simon Goertz, Steffen Rietz, Kristin Dietel, Wilfried Rozhon, Klaus Humbeck, Joerg Geistlinger, Günter Neumann, and Ingo Schellenberg

Rhizosphere-competent microbes often interact with plant roots and exhibit beneficial effects on plant performance. Numerous bacterial and fungal isolates are able to prime host plants for fast adaptive responses against pathogen attacks. The combined action of fungi and bacteria may lead to synergisms exceeding the effects of single strains. This study by Fatema Binte Hafiz et al. offers a perspective for the development of alternative and sustainable approaches to enhance the tolerance of rapeseed cultures against fungal infections.​

Jun 22
Join The American Phytopathological Society for Plant Health 2022!

Registration is open for the APS Annual Meeting, Plant Health 2022, taking place August 6–10 in Pittsburgh, PA. Don't miss this in-person meeting and the opportunity to network with plant pathologists and explore the profound changes in plant health research being driven by transformations in climate, technology, and society. We hope you can join us for this exciting event! Learn more and register.

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