The absence of the short arm of chromosome 7B produces inhibition of N mobilization 
and decreases grain protein concentration in wheat (<i>Triticum aestivum</i> L.) cv. Chinese Spring

Fatta, N.; Caputo, Carla; Barneix, Atilio J.

doi:10.1051/agro:2000138

Cited by 4 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been observed that the efficiency of N remobilization is governed by the availability of N in the soil. That is, N remobilization efficiency decreases with the increase in N availability (Dalling 1985, Fatta et al 2000, Ercoli et al 2008. Furthermore, an increase in the phloem amino acid exudation rate at the beginning of the grain filling period has been observed in field-grown barley plants subject to N deficiency (Veliz et al 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Final N concentration depends on soil NO 3 − absorbed and reduced during grain filling and on the remobilization from source tissues of N accumulated during vegetative period. Under conditions of high N availability in the soil, remobilization efficiency is decreased and a significant amount of N remains in the straw after harvest (Dalling 1985;Fatta et al 2000;Ercoli et al 2008). Barley, besides its importance as a crop, is an established model plant for agronomic, genetic, and physiological studies.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Post-anthesis N and P dynamics and its impact on grain yield and quality in mycorrhizal barley plants

et al. 2014

Self Cite

View full text Add to dashboard Cite

An essential goal for modern agriculture is the simultaneous improvement of productivity efficiency and nutrient use efficiency. One way to achieve this goal in crops is to enhance nitrogen (N) and phosphorus (P) acquisition through the mycorrhizal association. This study examined the effect of mycorrhization on post-anthesis N and P dynamics and its impact on grain yield and quality in barley. In addition, the efficiency of both N and P utilization and remobilization was evaluated. With those purposes, barley plants inoculated or not with Rhizophagus intraradices were grown in a soil poor in N and P under greenhouse conditions. Inoculation with R. intraradices in barley enhanced both N and P content in grain and vegetative tissue and reduced phloem amino acid export rate. On the other hand, both N and P vegetative tissue content and phloem amino acid and P export rates decreased during grain filling, whereas N and P grain content increased in both treatments according to the senescence process. However, whereas N grain concentration decreased during grain filling, P grain concentration did not vary, thus suggesting a differential regulation on grain filling. Inoculation with R. intraradices improved the yield and grain quality, thus demonstrating that inoculation with R. intraradices in barley is beneficial, but mycorrhization caused a diminution in nutrient utilization efficiency. As the phloem remobilization rate of amino acids and P did not decrease during grain filling in R. intraradices-inoculated plants compared to non-inoculated ones, these results suggest that nutrient utilization efficiency is most probably regulated by sink strength rather by a mycorrhizal effect.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Post-anthesis N and P dynamics and its impact on grain yield and quality in mycorrhizal barley plants

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…In common wheat, a number of QTL in chromosomes with which "direct" use of nitrogen for grain filling is associated are identified (1A, 4A, 1D) [65]. It was demonstrated on populations of T. durum from the cross DT695/Strongfield that an increase in GPC in recombinants is associated with the contribution of two main QTL both in N remobilization (on 2BL) and in direct intake of N into grain (on 7AL) [50].…”

Section: Remobilization Of Nitrogenmentioning

confidence: 99%

Genetic architecture of grain protein content in wheat

Krupnov

Krupnova

2012

Russ J Genet

View full text Add to dashboard Cite

Studies on identification and localization of quantitative traits for grain protein content (QGpc loci) on chromosomes in Triticum aestivum and Triticum durum are reviewed. Association of QGpc with vari ous traits of morphology, physiology, adaptation and tolerance to abiotic and biotic stress is shown. Genetic and environmental QGpc contexts that should be taken into account when using molecular markers in breed ing for the grain protein content are considered.

show abstract

The export of amino acid in the phloem is altered in wheat plants lacking the short arm of chromosome 7B

Caputo

Fatta

Barneix

2001

Journal of Experimental Botany

View full text Add to dashboard Cite

Grain protein content is one of the major determinants of the baking and nutritional quality of wheat. It has previously been reported that the ditelosomic line of wheat (Triticum aestivum L.) CSDT7BL, where the short arm of chromosome 7B is missing, shows a lower grain protein concentration than the normal line, but a similar grain yield. In the present paper the growth and nitrogen (N) metabolism of wheat plants cv. Chinese Spring (CS) and its ditelosomic line CSDT7BL were compared. When plants were grown to maturity in pots with different N supplements, the wild-type line showed a higher grain protein concentration and a lower straw N concentration than the ditelosomic line at every N level analysed, suggesting a deficiency in the N remobilization capacity. When 15-d-old plants were grown in a growth cabinet in pots with sand, and supplied with nutrient solutions of different nitrate concentrations, the ditelosomic line showed no differences in N uptake per unit of root dry weight, nitrate reductase activity, nitrate, total N concentration or free amino acid concentration. However, the ditelosomic line showed a decreased capacity to export amino acids in the phloem under high N, independently of the N source. This deficiency was also observed under dark-induced senescence. The diminished export of amino acids to the phloem was principally caused by a decrease in the export of Glu, Asp, and Gln. It is suggested that the decrease in grain protein concentration in the ditelosomic line is a consequence of defective export in the phloem of these amino acids.

show abstract

The absence of the short arm of chromosome 7B produces inhibition of N mobilization and decreases grain protein concentration in wheat (Triticum aestivum L.) cv. Chinese Spring

Cited by 4 publications

References 13 publications

Post-anthesis N and P dynamics and its impact on grain yield and quality in mycorrhizal barley plants

Post-anthesis N and P dynamics and its impact on grain yield and quality in mycorrhizal barley plants

Genetic architecture of grain protein content in wheat

The export of amino acid in the phloem is altered in wheat plants lacking the short arm of chromosome 7B

Contact Info

Product

Resources

About