Agrow is part of the Business Intelligence Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC’s registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

This copy is for your personal, non-commercial use. Please do not redistribute without permission.

Printed By


P syringae action elucidated

Researchers from the UK’s Imperial College (London) have elucidated the molecular mechanism used by the bacterial disease, Pseudomonas syringae, to trigger plant infection. In tomatoes, where it causes bacterial speck, it uses a pair of two very similar genes, HrpR and HrpS (HrpRS), which have evolved as a result of gene duplication. The genes work in tandem to launch the infection process that eventually kills the plant's cells. The researchers found that the HrpRS pair control the production of pili, which are needle-like structures through which bacteria secrete proteins that repress plant cell immune responses. Pili are only produced once bacteria are inside a plant cell. Pili development, and thus infection, cannot proceed effectively without both genes being active.



What to read next




Ask The Analyst

Please fill in the form below to send over your enquiry or check the Ask The Analyst Page to find out more about the service

Your question has been successfully sent to the email address below and we will get back as soon as possible. my@email.address.

All fields are required.

Please make sure all fields are completed.

Please make sure you have filled out all fields

Please make sure you have filled out all fields

Please enter a valid e-mail address

Please enter a valid Phone Number

Ask your question to our analysts