Abscisic acid substantially inhibits senescence of cucumber plants (Cucumis sativus) grown under low nitrogen conditions

Oka, Mariko; Shimoda, Yousuke; Sato, Naoko; Inoue, Junya; Yamazaki, Takahiro; Shimomura, Norihiro; Fujiyama, Hideyasu

doi:10.1016/j.jplph.2012.02.001

Cited by 31 publications

(14 citation statements)

References 43 publications

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“…Perhaps most well-characterized is ABA, which can induce stomatal closure to prevent pathogenic bacterial infection but can also negatively affect plant immunity when acting as a signal molecule [142]. Notably, N deficiency can enhance ABA synthesis, while NO 3 − decreases ABA levels when compared with NH 4 + [143,144]. This may represent either nutritional stress or a role for NO and indicates the connection between N metabolism and ABA-regulated plant immunity.…”

Section: N Metabolism Links Hormones and Nitric Oxide Impacts On Defencementioning

confidence: 99%

Unravelling the Roles of Nitrogen Nutrition in Plant Disease Defences

Sun

Wang

Mur

et al. 2020

IJMS

133

113

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Nitrogen (N) is one of the most important elements that has a central impact on plant growth and yield. N is also widely involved in plant stress responses, but its roles in host-pathogen interactions are complex as each affects the other. In this review, we summarize the relationship between N nutrition and plant disease and stress its importance for both host and pathogen. From the perspective of the pathogen, we describe how N can affect the pathogen’s infection strategy, whether necrotrophic or biotrophic. N can influence the deployment of virulence factors such as type III secretion systems in bacterial pathogen or contribute nutrients such as gamma-aminobutyric acid to the invader. Considering the host, the association between N nutrition and plant defence is considered in terms of physical, biochemical and genetic mechanisms. Generally, N has negative effects on physical defences and the production of anti-microbial phytoalexins but positive effects on defence-related enzymes and proteins to affect local defence as well as systemic resistance. N nutrition can also influence defence via amino acid metabolism and hormone production to affect downstream defence-related gene expression via transcriptional regulation and nitric oxide (NO) production, which represents a direct link with N. Although the critical role of N nutrition in plant defences is stressed in this review, further work is urgently needed to provide a comprehensive understanding of how opposing virulence and defence mechanisms are influenced by interacting networks.

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Section: N Metabolism Links Hormones and Nitric Oxide Impacts On Defencementioning

confidence: 99%

Unravelling the Roles of Nitrogen Nutrition in Plant Disease Defences

Sun

Wang

Mur

et al. 2020

IJMS

133

113

View full text Add to dashboard Cite

show abstract

“…Involvement of ABA as a stressrelated signalling molecule in nutrient deficiency responses has also been inferred from transcriptome studies, showing an upregulation of ABA-related genes under deficiency of magnesium (Hermans et al, 2010), phosphorus (Woo et al, 2012) or sulfur (Koprivova & Kopriva, 2016). However, elevated concentrations of ABA in leaves have also been measured under nitrogen (N) or potassium deficiency (Haeder & Beringer, 1981;Oka et al, 2012). Based on our results, B deficiency can be added to the list of nutrients employing ABA signalling to adjust shoot growth, maybe via the regulation of transpiration and photosynthesis.…”

Section: Researchmentioning

confidence: 99%

Response of the plant hormone network to boron deficiency

Eggert

Wirén

2017

New Phytologist

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Plant hormones (PH) adjust plant growth to environmental conditions such as nutrient availability. Although responses of individual PHs to growth-determining nutrient supplies have been reported, little is known about simultaneous dynamics in the metabolism of different PH species. Brassica napus seedlings were grown under increasing supply of B, and LC-MS/MS was used to characterize bioactive forms of different PH species together with several of their precursors, storage and inactivated forms. Increasing shoot B concentrations in response to B supply were accompanied by decreasing concentrations of abscisic acid (ABA) and indole-3-acetic acid (IAA), which appeared to be synthesized under B deficiency mainly via indole-3-acetonitrile (IAN). By contrast, shoot B concentrations correlated closely with cytokinins, and the B-dependent growth response appeared to be triggered primarily by de-novo synthesis of cytokinins and by re-routing less active towards highly active forms of cytokinin. Also gibberellin biosynthesis strongly increased with B supply, in particular gibberellin species from the non-13-hydroxylation pathway. The brassinosteroid castasterone appeared to support shoot growth primarily at suboptimal B nutrition. These results indicate that a variable B nutritional status causes coordinated changes in PH metabolism as prerequisite for an adjusted growth response.

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“…In recent years, many high-N fertilizer-resistant cultivars have been produced to meet the demand for high yields, and more N fertilizer is applied in the seeding stage to form soil environments high in N to meet the needs of wheat seedling growth. However, N uptake and use by plants depend not only on the supply but also on the interception and absorption ability of roots (Barbier-Brygoo et al 2011;Oka et al 2012). Root and shoot growth are slow at the seedling stage in wheat, and the root number, length, and interception area are low, resulting in weak N uptake ability.…”

Section: Introductionmentioning

confidence: 99%

Postponed and reduced basal nitrogen application improves nitrogen use efficiency and plant growth of winter wheat

Tian

Liu

et al. 2018

Journal of Integrative Agriculture

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Excessive nitrogen (N) fertilization with a high basal N ratio in wheat can result in lower N use efficiency (NUE) and has led to environmental problems in the Yangtze River Basin, China. However, wheat requires less N fertilizer at seedling growth stage, and its basal N fertilizer utilization efficiency is relatively low; therefore, reducing the N application rate at the seedling stage and postponing the N fertilization period may be effective for reducing N application and increasing wheat yield and NUE. A 4-year field experiment was conducted with two cultivars under four N rates (240 kg N ha-1 (N240), 180 kg N ha-1 (N180), 150 kg N ha-1 (N150), and 0 kg N ha-1 (N0)) and three basal N application stages (seeding (L0), fourleaf stage (L4), and six-leaf stage (L6)) to investigate the effects of reducing the basal N application rate and postponing the basal N fertilization period on grain yield, NUE, and N balance in a soil-wheat system. There was no significant difference in grain yield between the N180L4 and N240L0 (control) treatments, and the maximum N recovery efficiency and N agronomy efficiency were observed in the N180L4 treatment. Grain yield and NUE were the highest in the L4 treatment. The leaf area index, flag leaf photosynthesis rate, flag leaf nitrate reductase and glutamine synthase activities, dry matter accumulation, and N uptake post-jointing under N180L4 did not differ significantly from those under N240L0. Reduced N application decreased the inorganic N content in the 0-60-cm soil layer, and the inorganic N content of the L6 treatment was higher than those of the L0 and L4 treatments at the same N level. Surplus N was low under the reduced N rates and delayed basal N application treatments. Therefore, postponing and reducing basal N fertilization could maintain a high yield and improve NUE by improving the photosynthetic production capacity, promoting N uptake and assimilation, and reducing surplus N in soil-wheat systems.

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Abscisic acid substantially inhibits senescence of cucumber plants (Cucumis sativus) grown under low nitrogen conditions

Cited by 31 publications

References 43 publications

Unravelling the Roles of Nitrogen Nutrition in Plant Disease Defences

Unravelling the Roles of Nitrogen Nutrition in Plant Disease Defences

Response of the plant hormone network to boron deficiency

Postponed and reduced basal nitrogen application improves nitrogen use efficiency and plant growth of winter wheat

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