A few days ago I was in the process of replanting a lotus tuber from last year (thread of that here). I kept the lotus plant in a bin with water overnight while I resealed the leaky bottom of my pot. The next day I noticed a part of the tuber had turned black and it is most definitely rot. I planted it anyway since I had no idea what else to do about it. Is the rest of the tuber likely to rot and die, or is there hope?