Create an image of a futuristic plantoid, a synthetic organism designed to resemble and behave like a plant. The plantoid should have intricate root systems and appendages that extend towards beneficial environmental factors like sunlight, ideal temperatures, and water-rich areas. It should react to its surroundings with organic, plant-like movements and structures, mimicking a plant’s growth behavior. The design should incorporate advanced technology that blends seamlessly with natural plant features, showcasing the plantoid's adaptability to its environment for monitoring and research purposes. Visualize a variety of plantoids in diverse environments, displaying different shapes and sizes, while maintaining a harmony with nature.