Evolution of root endosymbiosis with bacteria: How novel are nodules?
Identifieur interne : 002A72 ( Main/Corpus ); précédent : 002A71; suivant : 002A73Evolution of root endosymbiosis with bacteria: How novel are nodules?
Auteurs : Katharina Markmann ; Martin ParniskeSource :
- Trends in plant science [ 1360-1385 ] ; 2009.
English descriptors
- KwdEn :
- MESH :
- genetics : Plant Root Nodulation, Plant Roots, Symbiosis.
- microbiology : Plant Roots.
- physiology : Mycorrhizae, Plant Root Nodulation.
- Biological Evolution.
Abstract
Plants form diverse symbioses with nitrogen-fixing bacteria to gain access to ammonium, a product of the prokaryote-exclusive enzyme nitrogenase. Improving the symbiotic effectiveness of crop plants like maize, wheat or rice is a highly topical challenge and could help reduce the need for energy-intense nitrogen fertilizer in staple food production. Root nodule symbiosis (RNS) constitutes one of the most productive nitrogen-fixing systems, but it is restricted to a small group of related angiosperms. Here, we review the genetic regulation of RNS and its interconnections with other plant symbiosis or plant developmental programs. Since RNS uses genetic programs that are widely conserved in land plants, we evaluate the prospects for a transfer to plants that are currently non-nodulating.
DOI: 10.1016/j.tplants.2008.11.009
PubMed: 19167260
Links to Exploration step
pubmed:19167260Le document en format XML
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<term>Plant Root Nodulation (physiology)</term>
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<front><div type="abstract" xml:lang="en">Plants form diverse symbioses with nitrogen-fixing bacteria to gain access to ammonium, a product of the prokaryote-exclusive enzyme nitrogenase. Improving the symbiotic effectiveness of crop plants like maize, wheat or rice is a highly topical challenge and could help reduce the need for energy-intense nitrogen fertilizer in staple food production. Root nodule symbiosis (RNS) constitutes one of the most productive nitrogen-fixing systems, but it is restricted to a small group of related angiosperms. Here, we review the genetic regulation of RNS and its interconnections with other plant symbiosis or plant developmental programs. Since RNS uses genetic programs that are widely conserved in land plants, we evaluate the prospects for a transfer to plants that are currently non-nodulating.</div>
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