My doctor has not advised any saline water application on my recipient area after transplant.

It is best to ask your surgeon about post operative care as each doctor has their unique regimen.  If your doctor advised you NOT to do something, then you should not do it.

Thank you for your question. You should follow the recovery instructions provided by your board certified facial plastic surgeon. 
Best wishes,

Different post operative hair transplant instructions for care vary by surgeon and different is not necessarily wrong. Please discuss the post operative instructions with your doctor and see his/her reasoning.

An FUE is treated just like a regular hair transplant with regard to the recipient area, but the donor area has open wounds which require daily washing with soap and water. Within 3 days of surgery, you can resume full activities, heavy exercises if you wish. The recipient area requires daily washes as well to keep the recipient area free of crusts. I generally recommend the use of a sponge and supply my patient with a surgical sponge to fill with soapy water and press on the recipient area daily. By repeating this daily, all crusts can be washed off without any fear of losing grafts. IF any crust is present, use a Q tip and dip it into soapy water, and roll it on the crusts and that will lift them off without dislodging them, but never rub them, just roll the Q tip on the recipient crust. I like to see no evidence of any crusting in the recipient area and the crusts from the donor area gone in 3-4 days with daily washing. To get the crusting off, you need to leave the shampoo on your hair for 10 minutes and as the crust become water logged, then will come off with gentle finger action. Repeat this twice a day until it is all
gone.