How did this plant end up. Did you keep growing the purple buds. Did they smoke good? Did the purple spread etc. Was it the phytoplasma disease?. I have a plant that is doing the same thing. Only on the lowest branch. Looks identical as yours. I just switched from veg nutrients to bloom. It is going under 15c nightly. I have 5 other plants that all get the same water same nutrients at the same time. 5 plants look normal. And this one is doing what yours is