. As light bounces off these structures within an iridoplast,
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Those structured chloroplasts also offer a survival benefit,
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, the new research shows: They help the plants collect light. In a hybrid of two species — Begonia grandis and Begonia pavonina?—?the structures enhance the absorption of green and red wavelengths by concentrating these rays on light-absorbing compartments within the iridoplasts. Importantly,
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“These iridoplasts can basically photosynthesize at low-light levels where normal chloroplasts just simply could not photosynthesize,” says study coauthor Heather Whitney, a plant biologist at the University of Bristol in England. Iridoplasts, however, can’t hold their own in bright light. So begonias also have standard chloroplasts, which provide

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