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Nouran is a scientist, educator, and life-long learner with a passion for making science more communicable. When not busy in the lab isolating blood macrophages, she enjoys writing on various STEM topics.
Ever wondered why tomatoes taste so bland?
Tomatoes used to have a sweet taste but scientists and farmers were obsessed with red ripe tomatoes that the taste was bred out via artificial selection.
Specifically, tasteless tomatoes were caused by a mutation that reduced the color variations of unripe green tomatoes settling them in a ‘uniform’ pale, green color. This mutation is in a gene now known as the Uniform gene where it’s naturally involved in tomato fruit chloroplast development. When mutated, as certain transcription factor, called Golden 2-like (GLK2), is disabled. Without GLK2 expression, a tomato's photosynthetic capacity is greatly reduced, resulting in decreased sugar content and ultimately flavorless tomatoes.