Engineering phosphorus metabolism in plants to produce a dual fertilization and weed control system.
Nat Biotechnol
; 30(9): 889-93, 2012 Sep.
Article
em En
| MEDLINE
| ID: mdl-22922674
ABSTRACT
High crop yields depend on the continuous input of orthophosphate (PO(4)(−3))-based fertilizers and herbicides. Two major challenges for agriculture are that phosphorus is a nonrenewable resource and that weeds have developed broad herbicide resistance. One strategy to overcome both problems is to engineer plants to outcompete weeds and microorganisms for limiting resources, thereby reducing the requirement for both fertilizers and herbicides. Plants and most microorganisms are unable to metabolize phosphite (PO(3)(−3)), so we developed a dual fertilization and weed control system by generating transgenic plants that can use phosphite as a sole phosphorus source. Under greenhouse conditions, these transgenic plants require 3050% less phosphorus input when fertilized with phosphite to achieve similar productivity to that obtained by the same plants using orthophosphate fertilizer and, when in competition with weeds, accumulate 210 times greater biomass than when fertilized with orthophosphate.
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Base de dados:
MEDLINE
Assunto principal:
Fósforo
/
Plantas Geneticamente Modificadas
/
Fertilizantes
/
Controle de Plantas Daninhas
/
Engenharia Metabólica
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article