Both the cultures suffer from "a senior is always right" mentality. Therefore, with my juniors, I used to intentionally (sometimes, and mostly during early days of their joinings) make stupid little mistakes (harmless) and used to let those folks figure that out and then appreciate them on catching it. Worked like wonder. Never ever anyone hesitated to discuss anything with me anytime.. even personal issues many times :)

You just have to make it easy for others to do their jobs. Removing barriers, of any kind, helps. This is even more true with juniors.