The concept of tissue culture was introduced by Haberlandt. It is important to understand the contributions of the other options as well. Halfmeister is not associated with the concept of tissue culture, so option 1 can be eliminated. Hanstein is known for his work in plant morphology, but he did not introduce the concept of tissue culture, so option 2 can also be eliminated. Option 4, Hanning, is not a known figure in the field of tissue culture, so it is unlikely to be the correct answer. Therefore, the correct answer is indeed option 3, Haberlandt.