Transport of Recently Assimilated15N Nitrogen to Individual Spikelets in Spring Wheat Grown in Culture Solution

Oscarson, Petter

doi:10.1006/anbo.1996.0145

Cited by 19 publications

(17 citation statements)

References 34 publications

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“…The roots maintained their capability to absorb N through the whole senescence period, in agreement with findings by Oscarson et al (1995b) and Oscarson (1996). For cv Sport the translocation system was maintained until Day 154, when the 15 N concentration was rising in the shoots and roots.…”

Section: Redistribution Of Nitrogensupporting

confidence: 80%

“…Similarly as in earlier studies (Mattson et al, 1992;Oscarson et al, 1995a;Oscarson, 1996;2000) using the cultivation technique applied in the present study, all N supplied to the plants were re-found in the plant. Earlier studies have shown that 12% of the N from the plant is lost to the soil through release from the roots (Rroco and Mengel, 2000).…”

Section: Root Development and Nitrogen Recoverysupporting

confidence: 65%

“…The N concentration in the roots at full maturity was in average for the two cultivars 5.2 mg g −1 dry weight. Higher root N concentration at full maturity than in this experiment has been found in wheat experiments with high N status (Oscarson 1996;Rroco and Mengel, 2000). During the vegetation period N concentration and N amount in the aboveground parts of cereals are higher at high N supply than at low N supply (Siman, 1974).…”

Section: Redistribution Of Nitrogenmentioning

confidence: 76%

“…To give an equal daily dose of N to the cultivars, the NA was set to 1.00 mg N seedling −1 before the first N dose. When RA is kept at a growth limiting level, the NA added daily is taken up within 24 hours and is equal to the relative increase in plant NA (Mattson et al, 1992;Oscarson et al, 1995a;Oscarson, 1996).…”

Section: Nitrogen Supplymentioning

confidence: 99%

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Nitrogen redistribution from the roots in post-anthesis plants of spring wheat

2005

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The aim of this study was to investigate post-anthesis N redistribution from the roots to other organs in the wheat plant. Two cultivars of spring wheat (Triticum aestivum L.) Sport and WL were grown to maturity in culture solution with stepwise-decreasing N supply and 15 N before sampling. The N concentration of dry weight in the roots decreased from anthesis to full maturity. At maturity the root N concentration was 5.5 mg g −1 dry weight for Sport and 4.9 mg g −1 dry weight for WL, while the main shoot N concentration was 2.1 mg g −1 dry weight for Sport and 2.2 mg g −1 dry weight for WL. The roots were a major sink for N taken up post-anthesis and contained the main proportion of the 15 N during the whole post-anthesis period. The N redistributed from the roots contributed 24.3% of the total N amount in the grains at maturity in cv Sport and 8.7% in cv WL. For cv Sport, 46.3% of the root N amount was redistributed to other parts of the plant and for WL 25.4%. The tiller grains were supplied with N from the 15 N applied post-anthesis to a higher degree than the main shoot grains. The transport capability was maintained until 12 days after complete yellowness. We concluded that wheat has a great ability to redistribute nitrogen from the root system to the grains.

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Section: Redistribution Of Nitrogensupporting

confidence: 80%

Section: Root Development and Nitrogen Recoverysupporting

confidence: 65%

Section: Redistribution Of Nitrogenmentioning

confidence: 76%

Section: Nitrogen Supplymentioning

confidence: 99%

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Nitrogen redistribution from the roots in post-anthesis plants of spring wheat

2005

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“…A third variable influencing GNC is the amount of N reallocated from the biomass to the grain, which might vary among the genotypes (Andersson et al, 2005). Reallocation of N from the leaves and stem to the grain was used as a certain breeding criteria when the genotype Sport was bred (Oscarson, 1996). However, in the present investigation the genotype Sport was not found to have very low SNC.…”

Section: Discussionmentioning

confidence: 67%

Genotypic Variationin Dry Weight and Nitrogen Concentration of Wheat Plant Parts; Relations to Grain Yield and Grain Protein Concentration

Malik¹,

Andersson²,

Kuktaite³

et al. 2012

JAS

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This study aimed at investigating genotypic variability in nitrogen (N) concentration and dry weight of wheat plant parts and their relation with grain yield and protein concentration. Sixteen Nordic and three Pakistani wheat genotypes were grown in controlled climate chambers. Plant parts such as shoot, roots and grains were collected after harvesting, weighed and N concentration was determined. The results showed a large genetic variation for dry weight and N concentration in the various plant parts. Grain weight (GW) was negatively correlated with biomass in the vegetative parts of the plant and with grain N concentration (GNC). A spread distribution was found among the investigated genotypes related with the correlation between different investigated parameters. From a breeding perspective, the genotypes APU and Møystad were of interest due to both a relatively high GW and GNC. Lanor, Saffran, Auqab and Lavett were interesting genotypes, the two first ones combining high GW, and the two last ones combining high GNC, with low RNC and high RW. By combining information of dry weight and N concentration in various plant parts of a genotype, options are increased for a successful breeding of environmentally sound cultivars with high grain yield and high grain protein concentration.

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Iron Complex with Ionic Tag‐Catalyzed Olefin Reduction under Oxidative Conditions—A Different Reaction for Iron

et al. 2012

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An iron(III) complex with ionic tags was applied to the reduction of alkenes in imidazolium-based ionic liquids (ILs) under oxidative conditions. The catalyst is very efficient to promote reactions of biomass derivatives. At least ten recycling reactions were performed without any loss of catalytic activity. Some important mechanistic insights for this new reaction are also provided based mostly on electrospray ionization quadrupole-time of flight mass spectrometry (ESI-QTOF-MS).

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Transport of Recently Assimilated15N Nitrogen to Individual Spikelets in Spring Wheat Grown in Culture Solution

Cited by 19 publications

References 34 publications

Nitrogen redistribution from the roots in post-anthesis plants of spring wheat

Nitrogen redistribution from the roots in post-anthesis plants of spring wheat

Genotypic Variationin Dry Weight and Nitrogen Concentration of Wheat Plant Parts; Relations to Grain Yield and Grain Protein Concentration

Iron Complex with Ionic Tag‐Catalyzed Olefin Reduction under Oxidative Conditions—A Different Reaction for Iron

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