Physiological responses of two soybean [Glycine max (L.) Merr] cultivars to short-term flooding

Oosterhuis, Derrick M.; Scott, H. D.; Hampton, R.E.; Wullschleger, Stan D.

doi:10.1016/0098-8472(90)90012-s

Cited by 130 publications

(91 citation statements)

References 15 publications

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“…The high levels of amino acids seen in the xylem may, therefore, simply reflect a detoxification mechanism for NH 4 + . The high energy costs of NH 4 + detoxification may explain the lack of photosynthates for dry mass accumulation, under conditions where photosynthate production is probably limited in view of the negative effect of flooding stress on photosynthesis (Linkemer et al, 1998;Oosterhuis et al, 1990). Evidently, the greater accumulation of N derived from NO 3 -reflects a more efficient metabolism of N than that seen with NH 4 + as N source.…”

Section: Discussionmentioning

confidence: 99%

Amino acid and ureide transport in the xylem of symbiotic soybean plants during short-term flooding of the root system in the presence of different sources of nitrogen

Thomas

Sodek

2006

Braz. J. Plant Physiol.

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The transport of organic N compounds to the shoot in the xylem sap of nodulated soybean plants was investigated in an attempt to better understand the changes in N metabolism under root hypoxia (first 5 days of flooding), with different sources of N in the medium. NO 3 -is beneficial for tolerance of plants to waterlogging, whereas other N sources such as NH 4 + and NH 4 NO 3, are not. Nevertheless, in the presence of NH 4 + high levels of amino acids were transported in the xylem, consistent with its assimilation. Some increase in the transport of amino acids was also seen with NO 3 -nutrition during waterlogging, but not with N-free medium. Ureide transport in the xylem was severely reduced during waterlogging, consistent with impaired N 2 fixation under these conditions. The relative proportions of some amino acids in the xylem showed dramatic changes during treatment. Alanine increased tremendously under root hypoxia, especially with NH 4 + as N source, where it reached near 70 % of the total amino acids present. Aspartic acid, on the other hand, dropped to very low levels and was inversely related to alanine levels, consistent with this amino acid being the immediate source of N for alanine synthesis. Glutamine levels also fell to a larger or lesser extent, depending on the N source present. The changes in asparagine, one of the prominent amino acids of the xylem sap, were most outstanding in the treatment with NO 3 -, where they showed a large increase, characteristic of plants switching from dependence on N 2 fixation to NO 3 -assimilation. The data indicate that the lesser effectiveness of NH 4 + during waterlogging, in contrast to NO 3 -, involves restricted amino acids metabolism, and may result from energy metabolism being directed towards NH 4 + detoxification. Key words: Glycine max, alanine, hypoxia, N metabolism.Transporte de aminoácidos e ureídeos no xilema de plantas de soja simbióticas sob curto período de alagamento do sistema radicular com diferentes fontes de nitrogênio: O transporte de compostos nitrogenados orgânicos à parte aérea de plantas de soja, através da seiva do xilema, foi investigado para melhor entender as mudanças no metabolismo do sistema radicular sob hipoxia (primeiros 5 dias de alagamento) e com diferentes fontes de N no meio. O NO 3 -é benéfico à tolerância das plantas ao alagamento, enquanto que outras fontes de N, como o NH 4 NO 3 e o NH 4 , não são. Contudo, na presença de NH 4 + elevados níveis de aminoácidos foram transportados no xilema, demonstrando sua assimilação. Algum aumento no transporte de aminoácidos também ocorreu com a presença de NO 3 -durante o alagamento, mas não na ausência de N no meio. O transporte de ureídeos no xilema foi severamente reduzido durante o alagamento, demonstrando a inibição da fixação de N 2 nessa condição. As proporções relativas de alguns aminoácidos no xilema demonstraram mudanças drásticas durante os tratamentos. Alanina aumentou acentuadamente com o sistema radicular sob hipoxia, especialmente com NH 4 + como fonte de N, quando e...

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Section: Discussionmentioning

confidence: 99%

Amino acid and ureide transport in the xylem of symbiotic soybean plants during short-term flooding of the root system in the presence of different sources of nitrogen

Thomas

Sodek

2006

Braz. J. Plant Physiol.

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“…Numerous previous studies on excess moisture injury in soybean specifically examined the stress-induced decrease of growth and related eco-physiological parameters such as leaf color, photosynthetic activity, nodule activity and mineral absorption during the waterlogged period (Bennett and Albrecht, 1984;Sojka, 1985;Buttery, 1987;Sallam and Scott, 1987;Griffin and Saxton, 1988;Scott et al, 1989;Oosteshuis et al, 1990;Sung, 1993;Sugimoto, 1994;Bacanamwo and Purcell, 1999). Few reports have described growth recovery after the removal of stress and its relation to final yield.…”

Section: Discussionmentioning

confidence: 99%

Effect of Waterlogging During Vegetative Stage On Growth And Yield in Supernodulating Soybean Cultivar Sakukei 4

Matsunami

Jung

Oki

et al. 2007

Plant Production Science

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“…Many researchers have investigated the response of single cultivars to low-oxygen conditions or the phenotypic consequences of waterlogging stress across multiple cultivars [9] [12] [15] [16]. Although the use of a comparative physiological approach might provide new insights into soybean waterlogging tolerance, there are no available reports describing studies involving several cultivars under normal and oxygen-stress conditions in the root zone.…”

Section: Introductionmentioning

confidence: 99%

“…Waterlogging is associated with characteristic injuries. For example, during germination, rapid water uptake causes the seed structure to collapse [7] [8], while in plantlets, it interferes with physiological characteristics such as leaf water potential, nitrogen fixation, and mineral absorption [9] [10] [11]. However, soybean plantlets adapt to waterlogged soils by forming adventitious roots [12] [13] and secondary aerenchyma [14], as well as by undergoing other non-morphological changes to their root system.…”

Section: Introductionmentioning

confidence: 99%

Hypoxia-Responsive Root Hydraulic Conductivity Influences Soybean Cultivar-Specific Waterlogging Tolerance

Jitsuyama¹

2017

AJPS

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Excess soil moisture induces hypoxic conditions and causes waterlogging injury in soybean [Glycine max (L.) Merr.]. This study investigated the mechanism underlying the development of waterlogging injury. Nine Japanese soybean cultivars with varying degrees of waterlogging tolerance were grown in a hydroponic system for 14 days under hypoxic conditions. Shoot and root biomasses and root hydraulic conductivity were measured at an early vegetative stage for plants under control and hypoxic conditions. Root morphological traits and intramembrane aquaporin proteins were also analyzed. The tolerance of each cultivar to field waterlogging was based on biomass changes induced by the hypoxia treatment. Root hydraulic conductivity responses to hypoxia were associated with changes in total dry weight, leaf dry weight, and leaf area. The effects of hypoxic conditions on root hydraulic conductivity were also represented by the changes in root morphology, such as total root length, thick-root length, and number of root tips. Additionally, a 32.3 kDa aquaporin-like protein seemed to regulate root hydraulic conductivity. Our results from a hydroponic culture suggest that the soybean cultivar-specific responses to hypoxic conditions in the rhizosphere reflect fluctuations in hydraulic conductivity related to root morphological or qualitative changes.

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Physiological responses of two soybean [Glycine max (L.) Merr] cultivars to short-term flooding

Cited by 130 publications

References 15 publications

Amino acid and ureide transport in the xylem of symbiotic soybean plants during short-term flooding of the root system in the presence of different sources of nitrogen

Amino acid and ureide transport in the xylem of symbiotic soybean plants during short-term flooding of the root system in the presence of different sources of nitrogen

Effect of Waterlogging During Vegetative Stage On Growth And Yield in Supernodulating Soybean Cultivar Sakukei 4

Hypoxia-Responsive Root Hydraulic Conductivity Influences Soybean Cultivar-Specific Waterlogging Tolerance

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