Not much research has been reported so far on biomolecule
delivery into plant cells. In this study, we have successfully delivered biomolecules of up to 250 kDa into canola protoplasts using
a microbubble assisted delivery method. The delivery efficiency
was around 90%. Although the delivery efficiency is similar at a
variety of centrifuge speeds and amounts of microbubble solution,
the FACS histogram showed that a higher amount of microbubble
solution could lead to stronger fluorescence. The advantage of this
method is the cost is extremely low. In addition, the number of
viable canola protoplast after microbubble assisted centrifugation
is as high as canola protoplasts which are centrifuged alone with
around 90% delivery efficiency. From confocal microscopy images,
we observed that FITC-Dextran could be delivered even into
canola cells with intact cell walls. This new delivery method holds
a great potential. Studies of this method’s applications in plant cel