Fourth IPWG Meeting

Valencia, Spain
September 8-12, 2019

Thank you to all who attended the 4th meeting of the International Phytoplasmologist Working Group that was held from the 8th to the 12th of September in Valencia, Spain.

4th IPWG Meeting Report

IPWG 2019 Meeting


Abstract Book of the meeting




UNIVERSITY OF BOLOGNA leads a worldwide research to fight against bacteria affecting tropical and subtropical crops

Bologna, 15th May 2017
To address three economically important insect-borne prokaryote-associated diseases of perennial crops (palm, citrus and grapevine) with the aim of (read more...)






We have 3 guests online
Razin web
In Memory – Prof. Shmuel Razin 1929-2021
Words spoken By Shlomo Rottem at his service
Yaffa, Eran, Family members and friends,
We are now following Shmuel (Shmulik as known to all) on his final way. Shmulick was born in 1929 in Mandatory Palestine, and gone through all the troubled time of the pre-state of Israel: He was arrested by the British forces, served in the students’ brigade of the Hagana, took active part of the battles of the newly born Israel to defend Jerusalem. At the end of the Independence war, he started his studies at the Hebrew University. In 1955 He received his M.Sc. with honors, and in 1958 he received his PhD in Microbiology at the Lab of Late Prof. Gurevich and Prof. Rozansky from the Department of Clinical Microbiology of the Hebrew University and Hadassah Medical Center.
After a Postdoctoral period in the UK, he came back to the Hebrew university and established his own lab the Faculty of medicine. The lab became a cornerstone in the study of Mycoplasmas that were known at that time as PPLO. I was honored to be one of his very first students.
In 1971 Prof Razin received his Full professor, no doubt that this was one of the fasted nominations to such degree on those days.
In 1972 at a CIBA conference in London, Shmulick raise the idea to establish an International organization to study Mycoplasmas. This idea came to true couple of years later with the foundation of the IOM (International Organization for Mycoplasmology). Prof. Razin was one of the nine original founders.
Shmulick was a pioneer in using mycoplasma as a model organism for many aspects in Microbiology. In fact he changed the concept of mycoplasmas as anecdotal group of bacterial to the concept that mycoplasmas are one of the most established genus in Microbiology.
Shmulik was a unique researcher with the ability to write easily and fluently, and that resulted in hundreds of articles, reviews and commentaries in the leading scientific journals. Many of his manuscripts became iconic during the years, and for many years he was one of the mostly quoted authors in the scientific community.
The major scientific impact of Shmuel, was his works on cell membrane that lead to clear understanding on the membrane organization, its fluidity and the role of cholesterol on membrane stability. Shmuel was also one of the pioneers that alongside with late Prof. Morowitz from Yale, identified and defined the 380 essential genes to the viability of biological cell. A work that later lead to other pioneering work such as is done at the Craig Venter Institute.
Alongside his scientific role, Shmuel chaired the Institute for microbiology at the Hebrew University, He chaired the Israeli Society for Microbiology, the IOM. He served as the Dean for the Faculty of medicine at the Hebrew University. In the Faculty of medicine, he had a fundamental and pivotal role on the physical development as well as the scientific development of the medical school. After his retirement from the Hebrew University, he served as the chairman of the School for Medical Sciences at the Hadassah Graduate college for almost 20 years.
Shmulick was an outstanding teacher and one-of-a-kind role model. He always was happy to share his groundbreaking ideas with his colleges and students and always was happy with their success and accomplishments.
Today we have lost a friend and a colleague that knew always to stand behind, listen and help in whatever he could.
Shmuel was a solid rock for his friends and family and we will miss him.
May he rest in peace blessed by his memory.






WELCOME to the IPWG website

The Main goal of our group is to bring together researchers from entomology, molecular biology, and plant pathology to increase and expand knowledge about phytoplasma diseases worldwide


"Phytoplasma research has progressed greatly during the forty years since the fastidious pathogens have been identified by plant pathologists and entomologists in Japan. The intricate interactions between insect vectors and phytoplasmas continue to attract plant pathologists, entomologists, and molecular biologists, who contribute new findings from laboratories around the world. I still remember the time when phytoplasma diseases were believed to be caused by viruses. I also recall the time when tubercle bacteria could not yet be cultured in artificial media and, together with leprosy and syphilis pathogens, were considered fastidious. Until 1960 mycoplasmas were called fastidious PPLO, but Channok and Hayflick succeeded in growing them in a culture medium and the PPLO name was changed to mycoplasmas. Phytoplasmas multiply in plants and specific invertebrate animal vectors, but not yet in artificial culture media. I hope that collaboration between phytoplasma researchers and microbiologists will eventually result in the cultivation of the fastidious phytoplasmas. We are witnessing at the First Phytoplasma Meeting the close collaboration between researchers from universities and laboratories in countries on different continents. Science recognizes no political, religious, ethnic, or geographic borders and scientists speak only one language – the language of science. Scientists can collaborate with each other, irrespective of background and political believes. I hope that at the Second Phytopathology Meeting, which I would like very much to attend, there will already be reports about the successful cultivation of phytoplasmas. I am writing today to you and all participants of the First Phytoplasma Meeting to express my best wishes for your continuous and successful research and happy life."

July 24, 2007
Karl Maramorosch

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