Is the C:N ratio a reliable indicator of C allocation to primary and defence-related metabolisms in tomato?

Royer, Mathilde; Larbat, Romain; Bot, Jacques Le; Adamowicz, Stéphane; Robin, Christophe

doi:10.1016/j.phytochem.2012.12.003

Cited by 102 publications

(106 citation statements)

References 45 publications

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“…Some reports have indicated that the N supply did not influence the phenolic accumulation in leaves and roots of onion (Mogren et al, 2006), whereas Logan et al (1999) detected a low content of phenolics in plants grown under N deprivation. In contrast, high N levels in growth media have been associated with a reduction of both the content of phenolic compounds and the antioxidant capacity in vascular plants ( (Royer et al, 2013). In our study, leaves of Legacy showed a decrease in phenols (Figure 2a), including flavonoids ( Figure 2c) and anthocyanins (Figure 3), as a consequence of increasing N additions.…”

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confidence: 43%

Photosynthetic and Antioxidant Performance Are Differentially Affected by Short-Term Nitrogen Supply in Highbush Blueberry Cultivars at the Short-Term

et al. 2014

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E. Yañez-Mansilla, P. Cartes, M. Reyes-Díaz, A. Ribera-Fonseca, and M. Alberdi. 2014. Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars. Cien. Inv. Agr. 41(1): 61-70. Nitrogen (N) is an essential nutrient for photosynthesis and may influence phenolic compound synthesis in higher plants. The effect of different amounts of N (0 to 38 mM) provided on a short-term (4 d) basis on the photosynthetic and antioxidant performance of highbush blueberry cultivars (Legacy and Bluegold) grown in a nutrient solution was studied. In both cultivars, the N concentration of leaves slightly increased in response to the N supply, with Bluegold frequently showing higher N concentrations than Legacy. Photosynthesis was reduced in Bluegold at the highest N dose, whereas in Legacy, a decrease of CO 2 assimilation occurred under N starvation. This decrease in photosynthesis was accompanied by enhanced lipid peroxidation but only in Bluegold. In both cultivars superoxide dismutase (SOD) was activated with an increasing N supply. Legacy also showed increased SOD activity to counteract oxidative stress at higher N levels. Radical scavenging activity was not affected by the N supply. However, the total phenols and anthocyanins steadily declined in the leaves of Legacy, and flavonoids were significantly increased in the roots of both cultivars with increasing N treatments. Thus, our findings indicate that blueberry cultivars exhibit differential sensitivity to short-term N stress, and SOD appears to be more involved than phenolic compounds in the amelioration of N-induced oxidative stress. Further studies are required to confirm the sensitivity to either N starvation in Legacy or N excess in Bluegold under long-term conditions.

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confidence: 43%

Photosynthetic and Antioxidant Performance Are Differentially Affected by Short-Term Nitrogen Supply in Highbush Blueberry Cultivars at the Short-Term

et al. 2014

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“…While the control plants generated on average 7 new shoots per explant (SMR), plants under N stress conditions just generated 2 (70% less) (Table 1). When the aerial parts of plants are reduced against low availability of N, Cbased compounds are target to root construction to ensure efficient N uptake (Royer et al 2013;Ncube et al 2014). Here we observe that generated roots showed changes in their architecture; they were more numerous and 30% longer than those of control plants (Fig 1h-k).…”

Section: Discussionmentioning

confidence: 99%

MORPHOGENESIS AND SECONDARY METABOLITES PRODUCTION IN THE MEDICINAL PLANT Castilleja tenuiflora Benth. UNDER NITROGEN DEFICIENCY AND STARVATION STRESS IN A TEMPORARY IMMERSION SYSTEM

Cortes¹

2017

Rev.Mex.Ing.Quim.

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G. Inei-Shizukawa, H. A. Velasco-Bedrán, G. F. Gutiérrez-López and H. Hernández-Sánchez Abstract Castilleja tenuiflora Benth, is a medicinal plant that synthesizes secondary metabolites such as phenylethanoid glycosides (PhGs), flavonoids, lignans, and iridoid glycosides with pharmacological properties. Nutrient deficiency stress in in vitro culturing of plants has been shown to be a good biotechnological strategy to stimulate secondary metabolism. Our aim was to evaluate morphogenesis (growth and development) and the production of secondary metabolites in C. tenuiflora shoots in response to stress by nitrogen (N) deficiency and starvation in temporary immersion bioreactors. Shoots were grown in B5 liquid medium with 25.74 mM (control), 1.32, 0.66 (deficiency) and 0 mM (starvation) N concentration. In all treatments, matter and shoot multiplication rate (SMR) decreased over 40%, chlorophylls content decreased, roots length increased, and leaves showed chlorosis respect to control. Under 0.66 mM N deficiency, the enzyme phenylalanine ammonia lyase (PAL) was more active (twice more than control) and total phenolic compounds were enhanced. At day 21: maximum concentration of PhGs (verbascoside and isoverbascoside) and iridoids (aucubin) was observed in 0.66, 1.32 and 0 mM N treatments (283 ± 0.5, 90 ± 0.3 and 12.5 ± 0.1 mg g −1 DM, respectively); these concentrations were 175, 143 and 34% greater than respective controls on the same day. Additionally, presence of anthocyanins was evident in stems of all plants developed under N deficiency and starvation. Despite the fact that, the matter, SMR and chlorophylls decreased because N stress deficiency, the production of secondary metabolites was enhanced, demonstrating that in vitro culture in temporary immersion bioreactors under suitable nutrients deficit such as N is an appropriate strategy to stimulate secondary metabolism in C. tenuiflora. Keywords: abiotic stress, Aucubin, nitrogen starvation, phenylethanoid glycosides, RITA® bioreactor. ResumenCastilleja tenuiflora Benth., es una planta medicinal que sintetiza metabolitos secundarios como feniletanoides glicosilados (PhGs), flavonoides, lignanos, e iridoides; que presentan actividad farmacológica. El estrés por deficiencia de nutrientes en el cultivo de plantas in vitro ha mostrado ser una estrategia biotecnológica apropiada para estimular su metabolismo secundario. En este trabajo se evaluaron la morfogénesis (crecimiento y desarrollo) y la producción de metabolitos secundarios en brotes de C. tenuiflora en biorreactores de inmersión temporal expuestos a estrés por deficiencia y ausencia de nitrógeno (N). El estrés se aplicó a un cultivo de los brotes cultivados en medio líquido B5 con 25.74 mM (control), 1.32, 0.66 (deficiencia) y 0 mM (ausencia) de N. En comparación con el control, todos los tratamientos mostraron una disminución de más del 40% en la biomasa y elíndice de multiplicación de brotes, el contenido de clorofila disminuyó, la longitud de las raíces aumentó y las hojas mostraron clorosis. En defi...

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“…The carbon fixation rate CFR Plant photosynthesis and yield of the plants (tomatoes in this model) were estimated by the reported C/N ratio in tomato plants [42] and the reported N assimilation rate (Equations (3) and (6)). …”

Section: Car Microbial Biomassmentioning

confidence: 99%

Nutrients and Energy Balance Analysis for a Conceptual Model of a Three Loops off Grid, Aquaponics

Yogev

Barnes

Gross

2016

Water

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Food security, specifically in water scarce regions, is an increasing local and global challenge. Finding new ways to increase agricultural production in a sustainable manner is required. The current study suggests a conceptual model to integrate established recirculating aquaculture practices into a near-zero discharge aquaponic system that efficiently utilizes water, excreted nutrients and organic matter for energy. The suggested model allows to significantly extend the planted area and recover energy in the form of biogas to operate the system off-grid. A mass balance model of nitrogen, carbon and energy was established and solved, based on data from the literature. Results demonstrate that a fish standing stock of about 700 kg would produce 3.4 tons of fish annually and enough nutrients to grow about 35 tons of tomatoes per year (chosen as a model plant) and recover sufficient energy (70 kWh/day) to run the system on biogas and use less water. If proven successful, this approach may play a major role in sustainably enhancing food security in rural and water scarce regions.

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Is the C:N ratio a reliable indicator of C allocation to primary and defence-related metabolisms in tomato?

Cited by 102 publications

References 45 publications

Photosynthetic and Antioxidant Performance Are Differentially Affected by Short-Term Nitrogen Supply in Highbush Blueberry Cultivars at the Short-Term

Photosynthetic and Antioxidant Performance Are Differentially Affected by Short-Term Nitrogen Supply in Highbush Blueberry Cultivars at the Short-Term

MORPHOGENESIS AND SECONDARY METABOLITES PRODUCTION IN THE MEDICINAL PLANT Castilleja tenuiflora Benth. UNDER NITROGEN DEFICIENCY AND STARVATION STRESS IN A TEMPORARY IMMERSION SYSTEM

Nutrients and Energy Balance Analysis for a Conceptual Model of a Three Loops off Grid, Aquaponics

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