Regulation of nutrient exchange in the Rhizobium-legume symbiosis

Lead Research Organisation: John Innes Centre
Department Name: Contracts Office

Abstract

Nitrogen fixation by the legume-Rhizobium symbiosis is driven by a supply of carbon from the plant, so by understanding this process we can actually determine which factors regulate the total amount of nitrogen fixed. The regulation of nutrient exchange between a legume and Rhizobium is largely determined by two membrane systems, one is plant derived and the other is bacterial. Our approach to understanding the interactions within and between these membranes is to mutate and clone the bacterial transport systems important for nutrient exchange. The genetics governing regulation of expression of these transport systems is being investigated and their effects on nitrogen fixation assessed.

Publications

10 25 50
publication icon
Karunakaran R (2013) Malonate catabolism does not drive N2 fixation in legume nodules. in Applied and environmental microbiology

publication icon
Oldroyd GE (2011) The rules of engagement in the legume-rhizobial symbiosis. in Annual review of genetics

publication icon
Poole P (2017) Shining a light on the dark world of plant root-microbe interactions. in Proceedings of the National Academy of Sciences of the United States of America

publication icon
Terpolilli JJ (2012) What determines the efficiency of N(2)-fixing Rhizobium-legume symbioses? in Advances in microbial physiology

publication icon
Udvardi M (2013) Transport and metabolism in legume-rhizobia symbioses. in Annual review of plant biology

 
Description Botanic Gardens seminar 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Public/other audiences
Results and Impact I talked to the Botanic Gardens about nitrogen and humanity

Lots of questions and feedback. This is widely advertised to the public
Year(s) Of Engagement Activity 2014
 
Description Give peas a chance 
Form Of Engagement Activity A magazine, newsletter or online publication
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Schools
Results and Impact We made a film with Oxford sparks on nitrogen fixation

Lots os hits on the web site
Year(s) Of Engagement Activity 2014
 
Description Meeting minds Oxford Alumni 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Local
Primary Audience Public/other audiences
Results and Impact I gave a talk to the Oxford biological sciences Alumni

Enthusiastic response from the audience
Year(s) Of Engagement Activity 2014
 
Description Schools one week Intensive course 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Schools
Results and Impact Intensive one week course for A level students in practical plant and microbial science

Students all keen to apply for science based university courses
Year(s) Of Engagement Activity 2014
 
Description Wymondham academy school visit 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Schools
Results and Impact Talk to 6th form students to encourage them to consider science as a career

Students keen to apply for university places
Year(s) Of Engagement Activity 2014