Mold on plywood in cold room

Hi All, I just purchased my first house and noticed that there is some mold on the plywood of the cold room ceiling which I'd like to remove. My question is, is it better to simply remove all this wood in order to get rid of the mold (and if so how can I go about doing this)? Or am I better off leaving the wood as is and trying to clean the mold off it? Also, does it look like the black shading on the concrete is mold as well? Attachment 38856 (http://www.doityourself.com/forum/attachments/basements-attics-crawl-spaces/38856-mold-plywood-cold-room-20140910_144634.jpg)