Water Status Effect on Dinitrogen Fixation and Photosynthesis in Soybean

Djekoun, Abdelhamid; Planchon, C.

doi:10.2134/agronj1991.00021962008300020011x

Cited by 84 publications

(45 citation statements)

References 16 publications

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“…These results suggested that soil moisture could be one of the major environmental factors influencing the SNF ability of beans in our study. This is consistent with previous reports of the negative impact of water shortage on SNF in common bean (Sangakkara et al 1996;Devi et al 2013), soybean (Djekoun and Planchon 1991;Sprent 2006), faba bean, lupin, and peanut (Sinclair and Serraj 1995). The reduction in N fixation under dry environments has been attributed to induced nodule senescence and decline in nitrogenase activity (Becana et a1.…”

Section: Discussionsupporting

confidence: 93%

N₂ fixation ability of different dry bean genotypes

FaridMehdi

NavabiAlireza

2015

Can. J. Plant Sci.

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Farid, M. and Navabi, A. 2015. N 2 fixation ability of different dry bean genotypes. Can. J. Plant Sci. 95: 1243Á1257. Common bean (Phaseolous vulgaris L.) is generally known as a weak N 2 fixer compared with other legumes. The availability of genetic variation for N 2 fixation potential of common bean supports the idea that symbiotic nitrogen fixation (SNF) in common bean can be improved through breeding. To assess the potential N 2 fixation of selected common bean genotypes, 12 bean varieties including three Andean and nine Middle American were screened for SNF ability and related traits in controlled environments and field trials in Ontario, Canada. A non-nodulating mutant, R99, was used as the reference plant to estimate nitrogen derived from the atmosphere (Ndfa) through the natural 15 N abundance method. Significant variation was found among the bean genotypes for Ndfa and its related traits. Environmental and genotype by environmental effects significantly influenced Ndfa and its related traits. The three Andean bean genotypes were superior to Middle American genotypes for nodulation ability, while the Middle American genotypes were generally stronger nitrogen fixers in optimum soil moisture conditions. In general, nitrogen fixation was found to be significantly associated with seed yield and carbon isotope discrimination, an indicator of water use efficiency.

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Section: Discussionsupporting

confidence: 93%

N₂ fixation ability of different dry bean genotypes

FaridMehdi

NavabiAlireza

2015

Can. J. Plant Sci.

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“…In addition the recovery of photosynthesis was apparently greater than that of N 2 fixation. These results are in agreement with those obtained for several other legume species that showed a similar higher sensitivity of N 2 fixation as compared to the photosynthesis rate (Huang et al,1974;Dekoun and Planchon, 1991;Sinclair and Serraj, 1995;Serraj et al, 1999a).…”

Section: Discussionsupporting

confidence: 92%

“…(Sinclair and Serraj, 1995;Figueiredo et al, 1999a). It has been reported that N 2 fixation is more sensitive to water stress than CO 2 -photosynthetic assimilation (Dekoun and Planchon, 1991). However, the carbohydrate supply from leaves intensively limits the nodule activity (Schubert et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

N-compound accumulation and carbohydrate shortage on N2 fixation in drought-stressed and rewatered cowpea plants

Silveira

Costa

Viégas

et al. 2003

Span. j. agric. res.

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In this study nodulated cowpea plants were exposed to a progressive drought-stress followed by rewatering in order to establish mechanisms related to the nodule sensitivity to N 2 fixation. Water stress caused a prominent decrease in the dry matter of leaf and nodule in contrast to the root growth that was stimulated. The drought-stressed plants showed a great decline in the ureide concentration of xylem sap whilst the concentration of the nodule leghaemoglobin decreased slightly. The stressed-nodules had significant accumulation of soluble carbohydrates in parallel to intense increase in the concentration of ureide, total amino acid and proline. After two days rewatering, the leaf growth showed a significant enhancement whereas in nodules a poor recovery was observed. In addition, the nodule N 2 fixation capacity did not improve after rehydration whereas the sap ureide experienced only a slight recovery and surprisingly the content of nodule soluble protein continued to drop. In contrast, a significant recovery in the nodule leghaemoglobin content was observed. Rewatering greatly induced depletion of both sucrose and total soluble sugar contents of nodules that were associated to a great decrease in the concentration of ureide, proline and amino acids, especially in leaves. Conversely the poor recovery of cowpea nodules after rehydration was apparently related to a carbohydrate shortage.Key words: leghaemoglobin, ureide, symbiose, water stress, Vigna unguiculata. Resumen Acumulación de componentes nitrogenados y reducción de carbohidratos en la fijación de nitrógeno de plantas de Vigna unguiculata (L.) Walp sometidas a estrés hídrico y rehidratadasA fin de establecer los mecanismos relacionados con la capacidad de los nódulos para fijar nitrógeno atmosférico, se expusieron plantas de Vigna unguiculata (L.) Walp noduladas a un estrés progresivo de sequía seguido de rehidratación. La sequía produjo una importante disminución en la materia seca de las hojas y de los nódulos, y en cambio estimuló el crecimiento de las raíces; por otro lado, hubo una gran disminución en la concentración de ureidos de la savia del xilema. Los nódulos sometidos a estrés presentaron una acumulación significativa de carbohidratos solubles, junto con un intenso aumento de la concentración de ureidos, aminoácidos totales y prolina, disminuyendo levemente la concentración de leghemoglobina. Tras dos días de rehidratación, el crecimiento de las hojas aumentó significativamente, pero tanto los ureidos de la savia como los nódulos sólo se recuperaron de forma leve, y no aumentó su capacidad de fijación de N 2 . Además, sorprendentemente, el contenido de proteínas solubles de los nódulos siguió disminuyendo, aunque el contenido de leghemoglobina se recuperó significativamente. Una rehidratación intensa indujo reducción tanto en el contenido de sacarosa como de azúcares solubles totales de los nódulos, junto con una gran disminución en la concentración de ureidos, prolina y aminoácidos, especialmente en las hojas. La pobre recuperación ...

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“…N 2 fixation in soybean is reportedly more sensitive to moderate water deficits than are many other plant processes including transpiration (Sall and Sinclair, 1991;Serraj and Sinclair, 1996) and leaf gas exchange (Durand et al, 1987;Djekoun and Planchon, 1991). It has been proposed that increased tolerance of N 2 fixation to water deficits would increase overall water-deficit tolerance in soybean.…”

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Inhibition of N2 Fixation in Soybean Is Associated with Elevated Ureides and Amino Acids

2005

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Decreased N 2 fixation in soybean (Glycine max) L. Merr. during water deficits has been associated with increases in ureides and free amino acids in plant tissues, indicating a potential feedback inhibition by these compounds in response to drought. We evaluated concentrations of ureides and amino acids in leaf and nodule tissue and the concurrent change in N 2 fixation in response to exogenous ureides and soil-water treatments for the cultivars Jackson and KS4895. Exogenous ureides applied to the soil and water-deficit treatments inhibited N 2 fixation by 85% to 90%. Mn fertilization increased the apparent catabolism of ureides in leaves and hastened the recovery of N 2 fixation following exogenous ureide application for both cultivars. Ureides and total free amino acids in leaves and nodules increased during water deficits and coincided with a decline in N 2 fixation for both cultivars. N 2 fixation recovered to 74% to 90% of control levels 2 d after rewatering drought-stressed plants, but leaf ureides and total nodule amino acids remained elevated in KS4895. Asparagine accounted for 82% of the increase in nodule amino acids relative to well-watered plants at 2 d after rewatering. These results indicate that leaf ureides and nodule asparagine do not feedback inhibit N 2 fixation. Compounds whose increase and decrease in concentration mirrored the decline and recovery of N 2 fixation included nodule ureides, nodule aspartate, and several amino acids in leaves, indicating that these are potential candidate molecules for feedback inhibition of N 2 fixation.Water-deficit stress is often a primary constraint of soybean (Glycine max) yields (Purcell and Specht, 2004). N 2 fixation in soybean is reportedly more sensitive to moderate water deficits than are many other plant processes including transpiration (Sall and Sinclair, 1991;Serraj and Sinclair, 1996) and leaf gas exchange (Durand et al., 1987;Djekoun and Planchon, 1991). It has been proposed that increased tolerance of N 2 fixation to water deficits would increase overall water-deficit tolerance in soybean.Despite much research effort in the area, the mechanisms influencing N 2 fixation response to limited soil water are not well understood. Accumulating evidence indicates that the decline in N 2 fixation during water deficits and genotypic differences in sensitivity to drought may be associated with levels of nitrogenous compounds, such as amino acids or ureides, in leaves or nodules of N 2 -fixing plants (Silsbury et al., 1986;Parsons et al., 1993;Oti-Boateng and Silsbury, 1993;Serraj et al., 1999a;Purcell et al., 2000;. How specific compounds regulate nodule activity is unclear, although several hypotheses have been proposed (Serraj et al., 1999b).The ureides, allantoin and allantoate, are the final products of N 2 fixation that are exported from soybean nodules to the shoot (McClure and Israel, 1979), where they are catabolized. While N 2 fixation declines in response to water deficits, shoot ureides often increase (de Silva et al., 1996; due to a decrease...

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Water Status Effect on Dinitrogen Fixation and Photosynthesis in Soybean

Cited by 84 publications

References 16 publications

N₂ fixation ability of different dry bean genotypes

N₂ fixation ability of different dry bean genotypes

N-compound accumulation and carbohydrate shortage on N2 fixation in drought-stressed and rewatered cowpea plants

Inhibition of N2 Fixation in Soybean Is Associated with Elevated Ureides and Amino Acids

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Water Status Effect on Dinitrogen Fixation and Photosynthesis in Soybean

Cited by 84 publications

References 16 publications

N2 fixation ability of different dry bean genotypes

N2 fixation ability of different dry bean genotypes

N-compound accumulation and carbohydrate shortage on N2 fixation in drought-stressed and rewatered cowpea plants

Inhibition of N2 Fixation in Soybean Is Associated with Elevated Ureides and Amino Acids

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N₂ fixation ability of different dry bean genotypes

N₂ fixation ability of different dry bean genotypes