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Effective nodulation takes place approximately four weeks after crop planting, with the size, and shape of the nodules dependent on the crop. Crops such as soybeans, or peanuts will have larger nodules than forage legumes such as red clover, or alfalfa, since their nitrogen needs are higher.
Investigating nodulation in legumes is essential for understanding plant development, the evolution of symbiosis and the plants response to developmental change. Further study of nodulation and nitrogen fixation may lead to a reduction in the need for nitrogen based fertilisers, which would benefit farmers and the environment.
Using genetic and genomic approaches, many components acting in the regulation of nodulation have now been identified. Discovering and functionally characterizing these components can provide genetic targets and polymorphic markers that aid in the selection of superior legume cultivars and rhizobia strains that benefit agricultural sustainability and food security.
- Brett J. Ferguson, Céline Mens, April H. Hastwell, Mengbai Zhang, Huanan Su, Candice H. Jones, Xiton...
- 2019
Aug 5, 2011 · In addition to the shoot-regulated hypernodulation mutants, other mutants have been identified, such as too much love (tml) from L. japonicus, nodulation3 (nod3) from pea and root determined nodulation1 (rdn1) from M. truncatula that systemically inhibit nodulation and of which the hypernodulation phenotype is controlled by the root (Postma, Jacobsen & Feenstra 1988; Magori et al. 2009).
- Virginie Mortier, Marcelle Holsters, Sofie Goormachtig
- 2012
Mar 3, 2014 · Legumes supply nutrients such as malate, SO 4 2-, Fe 2+, Mg 2+, and MoO 4 2-across the peribacteroid membrane and this is a potential level of control; the legume transporters for SO 4 2-and Fe 2+ (Sst1 and Dmt1, respectively) have been characterised, but others have yet to be identified. In addition, legumes produce phytoalexins and antimicrobial metabolites such as canavanine that can limit ...
May 28, 2018 · The use of molecular and bioinformatic techniques to identify the key genetic markers, quantitative trait loci (QTL), and functional genes associated with acid-tolerant nodulation, coupled with genome editing (e.g., CRISPR) and modern breeding approaches, could rapidly and effectively aid in overcoming this limitation of acid soils on legume nodulation (Bian, Zhou, Sun, & Li, 2013; Scheben ...
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Feb 29, 2024 · Legumes have the ability to establish a nitrogen-fixing symbiosis with soil rhizobia that they house in specific organs, the nodules. In most rhizobium-legume interactions, nodulation occurs on ...
