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Regulation of resource partitioning coordinates nitrogen and rhizobia responses and autoregulation of nodulation in the legume Medicago truncatula
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Lagunas, Beatriz, Achom, Mingkee, Bonyadi-Pour, Roxanna, Pardal , Alonso Javier, Richmond, Bethany L., Sergaki, Chrysi, Vázquez, Saúl, Schäfer, Patrick, Ott, Sascha, Hammond, John and Gifford, Miriam L. (2019) Regulation of resource partitioning coordinates nitrogen and rhizobia responses and autoregulation of nodulation in the legume Medicago truncatula. Molecular Plant, 12 (6). pp. 833-846. doi:10.1016/j.molp.2019.03.014 ISSN 1674-2052.
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Official URL: https://doi.org/10.1016/j.molp.2019.03.014
Abstract
Understanding how plants respond to nitrogen in their environment is crucial for determining how they use it and how this nitrogen use impacts other processes related to plant growth and development. Under nitrogen limitation the activity and affinity of uptake systems is increased in roots and lateral root formation is regulated in order to adapt to lower nitrogen levels and scavenge from the soil. Plants in the legume family can form associations with rhizobial nitrogen fixing bacteria, and this association is tightly regulated by nitrogen levels. The effect of nitrogen on nodulation has been investigated in a number of studies but the effect of nodulation on nitrogen responses has received much less attention. We integrated molecular and phenotypic data in the legume Medicago truncatula and determined that genes controlling nitrogen influx are differently expressed depending on whether plants are mock- or rhizobia-inoculated. Our results show that a functional autoregulation of nodulation pathway is required for roots to perceive, uptake and mobilise nitrogen as well as for normal root development. Together we found that autoregulation of nodulation, root development and the location of nitrogen are processes balanced by the whole plant system as part of a resource partitioning mechanism.
Item Type: | Journal Article | |||||||||||||||||||||
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Subjects: | Q Science > QK Botany | |||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Computer Science Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) |
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Library of Congress Subject Headings (LCSH): | Plants -- Effect of nitrogen on | |||||||||||||||||||||
Journal or Publication Title: | Molecular Plant | |||||||||||||||||||||
Publisher: | Cell Press | |||||||||||||||||||||
ISSN: | 1674-2052 | |||||||||||||||||||||
Official Date: | 3 June 2019 | |||||||||||||||||||||
Dates: |
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Volume: | 12 | |||||||||||||||||||||
Number: | 6 | |||||||||||||||||||||
Page Range: | pp. 833-846 | |||||||||||||||||||||
DOI: | 10.1016/j.molp.2019.03.014 | |||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||
Date of first compliant deposit: | 19 March 2019 | |||||||||||||||||||||
Date of first compliant Open Access: | 11 June 2019 | |||||||||||||||||||||
RIOXX Funder/Project Grant: |
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