A chloroplast is the part of a plant cell that captures light and turns it into energy through photosynthesis. It contains chlorophyll, the green pigment that gives leaves their color and allows the plant to make sugars from light, water, and carbon dioxide.
For plant owners, chloroplasts are why light matters so much. When a plant gets enough light, chloroplasts work efficiently and support steady growth. In low light, they produce less energy, which can lead to slow growth and pale or yellowing leaves.
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