The Kingdom Plantae includes all eukaryotic chlorophyll-containing organisms having prominent chloroplasts and cellulosic cell walls.
Mode of nutrition is mainly autotrophic. It occurs through the process of photosynthesis.
However, some plants have heterotrophic mode of nutrition, such as Cuscuta which is a parasitic plant. The insectivorous plants like Venus Fly Trap are partially heterotrophic.
The reserve food material is starch.
Ecologically, they act as producers in an ecosystem.
Producers perform photosynthesis in the presence of light.