Transient GUS gene expression in cassava (Manihot esculenta Crantz) using Agrobacterium tumefaciens leaf infiltration


Paula Díaz T
Adriana Bernal G
Camilo López C


Objective. Assess transient gene expression of GUS in cassava (Manihot esculenta Crantz) leaves using Agrobacterium tumefaciens infiltration. Materials and methods. A. tumefaciens strains GV3101 and AGL1 containing pCAMBIA1305.2 were used to evaluate transient gene expression of β-glucuronidase (GUS). A. tumefaciens infiltration (agroinfiltration) was made using both leaves from in vitro and 1 month old greenhouse plants. Leaves were incubated in X-GLUC buffer, stained and photographed to detect GUS activity. Results. Agroinfiltration assays showed GUS transient expression in leaves of cassava varieties widely cultivated in the north coast and eastern savannah, MCOL2215 (Venezuelan) and CM6438-14 (Vergara), respectively. A. tumefaciens agressive strain AGL1 showed high efficiency inducing GUS expression in cassava leaves. Conclusions. We recommend using A. tumefaciens agressive strain AGL1 for agroinfiltration to assess transient expression in cassava leaves.

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