HERBICIDAS INIBIDORES DA GLUTAMINA SINTETASE

Debora DE O. LATORRE; Ilca P. DE F. E SILVA; Josué F. DA S. JUNIOR; Fernando F. PUTTI; Ana P. SCHIMIDT; Rafael LUDWIG

doi:10.18011/bioeng2013v7n3p134-141

Autores

Debora DE O. LATORRE
Ilca P. DE F. E SILVA
Josué F. DA S. JUNIOR
Fernando F. PUTTI
Ana P. SCHIMIDT
Rafael LUDWIG

DOI:

https://doi.org/10.18011/bioeng2013v7n3p134-141

Palavras-chave:

amônio glufosinate, sítio de ação, glutamato

Resumo

O amônio glufosinate é um herbicida aplicado em pós-emergência, não seletivo, de baixa translocação e amplo espectro de controle de plantas daninhas. É o único herbicida comercializado no Brasil pertencente aos inibidores da glutamina sintetase (GS). A GS é a enzima responsável por catalisar a formação de glutamina, incorporando uma molécula de amônio no aminoácido glutamato e, sua inibição promove acúmulo de amônia a níveis tóxicos para as plantas. As plantas Liberty Link^® são constituídas por um gene que codifica a produção da enzima fosfinotricina acetil transferase (PAT), responsável pela acetilação do amônio glufosinate, inativando-o na planta. Nesta revisão, serão abordados aspectos relacionados ao comportamento no solo, absorção e translocação, sintomas do herbicida amônio glufosinate, assim como a tecnologia Liberty Link^® e casos de resistência.

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