High irradiance improves ammonium tolerance in wheat plants by increasing N assimilation

Setién, Igor; Fuertes‐Mendizábal, Teresa; González, Amalia Rodríguez; Tejo, Pedro María Aparicio; González‐Murua, Carmen; González‐Moro, María Begoña; Estavillo, J. M.

doi:10.1016/j.jplph.2012.12.015

Cited by 83 publications

(85 citation statements)

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“…This primarily results in glutamine, which is catalysed by GS. Drought sensitivity and light dependence were previously reported in wheat (Nagy et al, 2013;Setién et al, 2013). In the two durum cultivars, the GS activity similarly decreased during water deprivation at low temperature.…”

Section: Discussionsupporting

confidence: 74%

Reduced light and moderate water deficiency sustain nitrogen assimilation and sucrose degradation at low temperature in durum wheat

Majláth

Darkó

Palla

et al. 2016

Journal of Plant Physiology

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(I. Majláth). 2 SUMMARYThe rate of carbon and nitrogen assimilation is highly sensitive to stress factors, such as low temperature and drought. Little is known about the role of light in the simultaneous effect of cold and drought. The present study thus focused on the combined effect of mild water deficiency and different light intensities during the early cold hardening in durum wheat (Triticum turgidum ssp. durum L.) cultivars with different levels of cold sensitivity. The results showed that reduced illumination decreased the undesirable effects of photoinhibition in the case of net photosynthesis and nitrate reduction, which may help to sustain these processes at low temperature. Mild water deficiency also had a slight positive effect on the effective quantum efficiency of PSII and the nitrate reductase activity in the cold. Glutamine synthesis was affected by light rather than by water deprivation during cold stress. The invertase activity increased to a greater extent by water deprivation, but an increase in illumination also had a facilitating effect on this enzyme. This suggests that both moderate water deficiency and light have an influence on nitrogen metabolism and sucrose degradation during cold hardening. A possible rise in the soluble sugar content caused by the invertase may compensate for the decline in photosynthetic carbon assimilation indicated by the decrease in net photosynthesis. The changes in the osmotic potential can be also correlated to the enhanced level of invertase activity. Both of them were regulated by light at normal water supply, but not at water deprivation in the cold. However, changes in the metabolic enzyme activities and osmotic adjustment could not be directly contributed to the different levels of cold tolerance of the cultivars in the early acclimation period.

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Section: Discussionsupporting

confidence: 74%

Reduced light and moderate water deficiency sustain nitrogen assimilation and sucrose degradation at low temperature in durum wheat

Majláth

Darkó

Palla

et al. 2016

Journal of Plant Physiology

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“…In this same line, it has been hypothesized that an improvement in the photosynthetic process, providing both the necessary energy and carbon skeletons to assimilate inorganic nitrogen into amino acids, should also lead to an amelioration of ammonium use. In this sense, the growth of plants under high irradiance led to increased photosynthetic carbon assimilation and alleviated the toxic effects of high external ammonium concentrations both in pea [13] and wheat plants [8]. Overall, improvement of N status occurs in parallel to TCA anaplerotic enzymes induction; and this induction has been shown to be higher under ammonium nutrition compared to nitrate nutrition [14][15][16].…”

Section: Introductionmentioning

confidence: 95%

“…Presently, although no single mechanism can fully account for ammonium toxicity/tolerance [2,4,5], several explanations are considered in relation to ammonium toxicity, as the energy deficit associated with futile transmembrane NH 4 + /NH 3 cycling [6], the acidification of the rhizosphere, the ammonium-induced imbalance of mineral cations [2,7] and the depletion of C required for enhanced ammonium assimilation [3,8,9]. Nevertheless, the modulation of certain environmental and growth conditions has been shown to be effective to alleviate ammonium toxicity symptoms such as, external pH buffering, co-provision of additional K + in the nutrient solution [2] or supplementation of a minimal amount of NO 3 - [10].…”

Section: Introductionmentioning

confidence: 99%

CO 2 enrichment modulates ammonium nutrition in tomato adjusting carbon and nitrogen metabolism to stomatal conductance

et al. 2015

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“…A combinação da fertilização amoniacal (10 mM) e exposição a alta irradiância (700 µmol de fótons m −2 s −1 ) proporcionou maior acúmulo de biomassa, incremento da razão raiz:parte aérea e das taxas fotossintéticas da espécie Triticum aestivum (Setién et al, 2013 ). As diferentes condições de irradiância proporcionaram diferenças na alocação de biomassa, sendo que plantas sob moderada irradiância investiram predominantemente na expansão de área foliar, enquanto plantas expostas a alta irradiância aumentaram a produção de matéria seca foliar e a razão raiz:parte aérea (Tripathi & Raghubanshi, 2014).…”

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“…Em particular, o efeito positivo do amônio em plantas submetidas a essa condição tem sido atribuído à maior densidade de fluxos fotossintéticos, que favorece a biossíntese de carboidratos, os quais são translocados para a raiz (Ariz et al, 2011), aumentando as taxas de assimilação do amônio, haja vista que a assimilação desse íon a aminoácidos e proteínas requer disponibilidade de carbono, fornecido pelo ciclo dos ácidos tricarboxílicos (TCA) (Ariz et al, 2013;Setién et al, 2013).…”

Section: Introductionunclassified

Efeito da Fertilização Amoniacal na Aclimatação de Ingá Sob Alta e Moderada Irradiância

et al. 2017

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RESUMOO nitrogênio pode ser determinante para a tolerância das plantas a fatores de estresse como a alta irradiância. O objetivo deste trabalho foi investigar o efeito da fertilização amoniacal na aclimatação de plantas jovens de ingá sob dois ambientes de luz. O acúmulo e partição de matéria seca, o crescimento, a capacidade fotossintética e os teores foliares de nitrogênio (N) foram analisados em plantas submetidas a irradiância moderada = 554,4 ± 81 µmol de fótons m -2 s -1 e alta irradiância = 1941 ± 12,3 µmol de fótons m -2 s -1 . Os maiores valores de matéria seca, crescimento e fotossíntese foram verificados em plantas sob moderada e alta irradiância fertilizadas com amônio. A área foliar específica foi maior nas plantas sob moderada irradiância, enquanto que os tratamentos controle e com a participação do N não diferiram entre si, independentemente do ambiente de luz. A fertilização amoniacal contribuiu para a aclimatação e promoveu o acúmulo de massa seca dos ingás sob moderada e alta irradiância, enquanto plantas crescendo sob moderada irradiância investiram em estratégias de interceptação de energia (e.g., área foliar específica). Palavras-chave:Inga edulis, Fabaceae arbórea, nitrogênio, crescimento, luz. Effect of Ammonium Fertilization on Acclimation of Ingá to High and Moderate Irradiance ABSTRACTNitrogen can be decisive for the tolerance of plants to stress factors such as high irradiance. This work aimed to investigate the effect of ammonium fertilization during acclimation of young ingá plants under two light environments. Accumulation and partitioning of dry matter, growth, photosynthetic capacity and leaf nitrogen content were analyzed in ingá plants subjected to moderate and high irradiance of 554.4±81 µmol photons m -2 s -1 and 1941±12.3 µmol photons m -2 s -1 , respectively. The highest values of dry matter, growth and photosynthesis were observed in plants subjected to moderate and high irradiance fertilized with ammonium. The specific leaf area was higher in plants under moderate irradiance, while the treatments control and N fertilization showed no differences, independent of light condition. The ammonium fertilization contributed to acclimation and dry matter accumulation of ingá under moderate and high irradiance, while plants subjected to moderate irradiance invested in strategies for energy interception (e.g. specific leaf area).

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High irradiance improves ammonium tolerance in wheat plants by increasing N assimilation

Cited by 83 publications

References 91 publications

Reduced light and moderate water deficiency sustain nitrogen assimilation and sucrose degradation at low temperature in durum wheat

Reduced light and moderate water deficiency sustain nitrogen assimilation and sucrose degradation at low temperature in durum wheat

CO 2 enrichment modulates ammonium nutrition in tomato adjusting carbon and nitrogen metabolism to stomatal conductance

Efeito da Fertilização Amoniacal na Aclimatação de Ingá Sob Alta e Moderada Irradiância

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