SUBSOIL ROOT GROWTH OF FIELD GROWN SPRING WHEAT GENOTYPES (<i>TRITICUM AESTIVUM</i>L.) DIFFERING IN NITROGEN USE EFFICIENCY PARAMETERS

Noulas, Christos; Liedgens, Markus; Stamp, P.; Alexiou, Ioannis; Herrera, Juan M.

doi:10.1080/01904167.2010.512049

Cited by 11 publications

(9 citation statements)

References 46 publications

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“…Of the tested genotypes, 'Toronit' showed continued photosynthetic activity after flowering, thus supporting findings for its good ability to take up N at flowering and by the end of the season (Noulas et al, 2010). Van Ginkel et al (2001) showed that uptake efficiency is more closely related with yield and biomass improvement at all N levels.…”

Section: Conclusion and Implications For Breedingmentioning

confidence: 59%

“…There are indications, that under low N conditions, 'Albis' translocated large amounts of N from the vegetative plant parts to grain (NTE) after anthesis and that a large amount of total plant N is stored in the seeds at maturity (NHI); but the grain yield potential of this genotype is moderate (Noulas et al, 2004) and its ability to take up N is limited (Noulas et al, 2010) both of which may limit the use of this genotype in breeding programs.…”

Section: Conclusion and Implications For Breedingmentioning

confidence: 99%

“…Nitrogen accumulation in the biomass was higher for 'Toronit' under both N levels in 1999, mainly due to its greater amount of biomass. Under high N supply in 2000, 'L94491' accumulated even more N in the biomass (significantly higher than 'Albis'), probably due to its higher post anthesis N uptake (Noulas et al, 2010).…”

Section: Shoot Biomass and N Accumulation By Anthesis And Maturitymentioning

confidence: 99%

“…'Albis' was the most efficient genotype in producing grain per unit of total plant N at high N supply in both years. However, this genotype was the least efficient genotype in producing grain yield per unit of N supply, mainly because of its markedly lower uptake efficiency (Noulas et al, 2010). 'Pizol' had a limited capacity to translate total plant N into grain yield thus this genotype may be less efficient in N use.…”

Section: Downloaded By [Tulane University] At 14:35 19 September 2013mentioning

confidence: 99%

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Course of Dry Matter and Nitrogen Accumulation of Spring Wheat Genotypes Known to Vary in Parameters of Nitrogen Use Efficiency

Noulas

Alexiou

Herrera

et al. 2013

Journal of Plant Nutrition

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2 Field experiments were conducted for two years to compare and identify bread spring wheat (Triticum aestivum L.) genotypes which make the most efficient use of nitrogen (N). Such information is required for breeding strategies to reverse the negative relationship between yield and protein content. Three Swiss spring wheat cultivars ('Albis', 'Toronit', 'Pizol') and an experimental line ('L94491') were grown without (N0; 0 kg N ha −1 ) and with high fertilizer N [(NH 4 NO 3 ); (N1; 250 kg N ha −1 ) supply on a clay loam soil with low organic matter content. Biomass and nitrogen accumulation in biomass as well as the leaf growth and senescence patterns (SPAD) were investigated in an attempt to explain the physiology of growth and N translocation of these genotypes. The pre-anthesis accumulation of biomass and N in the biomass depended on genotype only at N1 in 2000. In this year, conditions were less favorable for the pre-anthesis accumulation of biomass and N, which was, on average, 10 and 20% lower, respectively, of the total than in 1999. The contribution of pre-anthesis assimilates to the grain yield (CPAY) was higher in 1999 for all genotypes (36.9%) compared to 2000 (13.5%) except 'Toronit'. Between anthesis and maturity the climate influenced the genetic variability of some N use efficiency components: N translocation efficiency (NTE) and dry matter translocation efficiency (DMTE). NTE was higher in 1999NTE was higher in (68.1%) compared to 2000; 1999 was a year in which the post-anthesis period was drier and warmer than usual. 'Toronit' produced the highest biomass by maturity due mainly to greater and longer lasting green leaf area after anthesis. 'Albis' performed relatively well under low input conditions, with considerable amounts of N being re-translocated to the seeds at maturity (NHI), whereas 'Pizol' accumulated in grains N as high as for 'L94491'. In a humid temperate climate breeding for greater N uptake and partitioning efficiency may be a promising way to minimize N losses and produce high phytomass and grain yields. Using high protein lines as selection material and combining them with high biomass genotypes may lead to high protein contents without decreasing yield.

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Section: Conclusion and Implications For Breedingmentioning

confidence: 59%

Section: Conclusion and Implications For Breedingmentioning

confidence: 99%

Section: Shoot Biomass and N Accumulation By Anthesis And Maturitymentioning

confidence: 99%

Section: Downloaded By [Tulane University] At 14:35 19 September 2013mentioning

confidence: 99%

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Course of Dry Matter and Nitrogen Accumulation of Spring Wheat Genotypes Known to Vary in Parameters of Nitrogen Use Efficiency

Noulas

Alexiou

Herrera

et al. 2013

Journal of Plant Nutrition

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“…Another strategy of grasses adapted to low-fertility soils for soil nutrient utilization involves allocation of a large proportion of photosynthetically fixed carbon to root production (Rao et al 1995) when plants are under stressed conditions. The rapid initial growth of the root system is believed to be the main factor increasing N absorbed by these plants (Liao et al, 2004;Noulas et al, 2010), and this behavior favors grasses persistence in production system. Mombaça and Tanzania produced the highest root dry matter under both N rates (Fig.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen use of Panicum and Brachiaria cultivars vary with nitrogen supply: I. Differences in plant growth

Garcez¹,

Monteiro

2016

Aust J Crop Sci

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Tropical grass pastures are broadly split between those that use high N fertilizer rates and those that use little or none. Maximizing the efficiency of N application in pastures requires understanding which features and adaptations species utilize to take advantage. This study was designed to determine the variation in growth of Brachiaria cultivars (Basilisk, Marandu, Piatã and Xaraés) and Panicum cultivars (Aruana, Massai, Mombaça and Tanzania) under two N supply rates (low and high) in order to understanding forage-grass species adaptive mechanisms for high and low N supply. Changes in growth were determined based on the following characteristics: number of leaves and tillers, leaf area (LA), shoot dry matter (SDM) production, root surface area (RSA), root length (RL) and root dry matter(RDM) production. The experimental design consisted of 8 forage-grass cultivars x 2 N rates (30 and 300 mg dm-3) in a randomized block design with four replications. At low N supply, Marandu, Xaraés, Piatã, Basilisk and Mombaça cultivars maintained a constant number of tillers but showed a decrease in the number of leaves and LA compared to high N. Tanzania cultivar maintained a constant number of tillers and LA but showed a decrease in the number of leaves under low N. In contrast, cultivars Aruana and Massai showed an increased number of tillers and a reduced LA. At low N rate, Brachiaria cultivars prioritized roots growth but with high N supply increased leaf and tiller growth. Brachiaria cultivars demonstrated high plasticity of reserve allocation, suggesting that these cultivars may better withstand N stress, ensuring their persistence. Panicum cultivars exhibited vigorous roots growth which may improve the capture of soil N and reduce losses from leaching and volatilization, and also can contribute to reduce environment contamination.

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Root–root interactions: extending our perspective to be more inclusive of the range of theories in ecology and agriculture using in-vivo analyses

et al. 2013

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The development of non-invasive methods to dynamically study root-root interactions in vivo will provide the necessary tools to study a more inclusive conceptual framework for root-root interactions. By following the dynamics of root-root interactions through time in a whole range of scenarios and systems, using a wide variety of non-invasive methods, (such as fluorescent protein which now allows us to separately identify the roots of several individuals within soil), we will be much better equipped to answer some of the key questions in root physiology, ecology and agronomy.

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SUBSOIL ROOT GROWTH OF FIELD GROWN SPRING WHEAT GENOTYPES (TRITICUM AESTIVUML.) DIFFERING IN NITROGEN USE EFFICIENCY PARAMETERS

Cited by 11 publications

References 46 publications

Course of Dry Matter and Nitrogen Accumulation of Spring Wheat Genotypes Known to Vary in Parameters of Nitrogen Use Efficiency

Course of Dry Matter and Nitrogen Accumulation of Spring Wheat Genotypes Known to Vary in Parameters of Nitrogen Use Efficiency

Nitrogen use of Panicum and Brachiaria cultivars vary with nitrogen supply: I. Differences in plant growth

Root–root interactions: extending our perspective to be more inclusive of the range of theories in ecology and agriculture using in-vivo analyses

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