Defining the physiological determinants of low nitrogen requirement in wheat.
Biochem Soc Trans
; 49(2): 609-616, 2021 04 30.
Article
en En
| MEDLINE
| ID: mdl-33769462
ABSTRACT
Nitrogen (N) is a major nutrient limiting productivity in many ecosystems. The large N demands associated with food crop production are met mainly through the provision of synthetic N fertiliser, leading to economic and ecological costs. Optimising the balance between N supply and demand is key to reducing N losses to the environment. Wheat (Triticum aestivum L.) production provides food for millions of people worldwide and is highly dependent on sufficient N supply. The size of the N sink, i.e. wheat grain (number, size, and protein content) is the main driver of high N requirement. Optimal functioning of temporary sinks, in particular the canopy, can also affect N requirement. N use efficiency (i.e. yield produced per unit of N available) tends to be lower under high N conditions, suggesting that wheat plants are more efficient under low N conditions and that there is an optimal functioning yet unattained under high N conditions. Understanding the determinants of low N requirement in wheat would provide the basis for the selection of genetic material suitable for sustainable cereal production. In this review, we dissect the drivers of N requirement at the plant level along with the temporal dynamics of supply and demand.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Triticum
/
Grano Comestible
/
Productos Agrícolas
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Fertilizantes
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Nitrógeno
Límite:
Humans
Idioma:
En
Revista:
Biochem Soc Trans
Año:
2021
Tipo del documento:
Article
País de afiliación:
Reino Unido