The Rhizobium leguminosarum bv. viciae NodO protein compensates for the exported signal made by the host-specific nodulation genes

Downie, J. A.; Economou, Anastassios; Scheu, A. K.; Johnson, Aaron; Firmin, J. L.; Wilson, Karen E.; Cubo, MT; Mavridou, Annoula; Marie, Corinne; Davies, A.M.C.; Surin, Prayoon

doi:10.1007/978-1-4684-6432-0_21

Cited by 6 publications

(2 citation statements)

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“…In fact, it is responsible for generating the greatest amount of symbiotically fixed N 2 , totaling roughly 20 million tons each year (Herridge et al 2008). Soybean root nodule nitrogen fixation is a symbiotic process, whereby Rhizobium colonize soybean roots to form nodular structures that carry out biological nitrogen fixation (Kijne et al 1990;Yan et al 2014;Nanjareddy et al 2017;Dennis et al 2015;Downie et al 1990). In this process, root nodules capture N 2 from the air and then the nitrogen is incorporated into nitrogen-containing compounds, which serve as an important nitrogen source.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen fixation capacity and metabolite responses to phosphorus in soybean nodules

Yao

Yuan

et al. 2022

Symbiosis

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Phosphorus (P) is necessary for nitrogen fixation in the root nodules of soybeans, a symbiotic process whereby plants support bacterial nitrogen fixation to obtain nitrogen needed for plant growth. Nitrogen accumulation, quantity, weight, specific nitrogenase activity (SNA) and acetylene reduction activity (ARA) of root soybean nodules were analyzed, using a broadly targeted metabolomics method incorporating liquid chromatography-mass spectrometry (LC-MS) to study the effects of P level (1, 11, 31, 61 mg/L denoted by P1, P11, P31, P61) on the types and abundance of various metabolites and on the expression of associated metabolic pathways in soybean root nodules. Nitrogen accumulation, quantity, weight, SNA and ARA of root nodules were inhibited by P stress. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis indicated that root nodules responded to P stress by increasing the number of amino acids and derivatives. Down-regulation of ABA, phosphorylcholine, and D-glucose 6-phosphate affected carotenoid biosynthesis, glycerophospholipid metabolism and sugar metabolism which inhibited nodule nitrogen fixation under P stress. More flavonoids were involved in metabolic processes in soybean root nodules under P stress that regulated the nodulation and nitrogen fixation. The pathway ascorbate and aldarate metabolism, and associated metabolites, were involved in the adaptation of the symbiotic soybean root nodule system to P starvation. This work provides a foundation for future investigations of physiological mechanisms that underly phosphorus stress on soybeans.

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Section: Introductionmentioning

confidence: 99%

“…Thus, nitrogen fixation efficiency is a key determinant of soybean growth and yield. Indeed, root nodule-associated nitrogen fixation accounts for over 60% of total nitrogen accumulation in soybean plants during the various developmental stages (Downie et al 1990;Zhao et al 2017;Tate 1995).…”

Section: Introductionmentioning

confidence: 99%