One protein family controls how fruit gets its color
Zhou Z, Li T, Yan Z, Cong K, Wu C
Plant Signaling
The next time you watch a tomato turn red on the vine or an apple blush in the fall sun, a specific set of genetic switches called WRKY proteins is deciding exactly when and how much color shows up.
Fruit color comes from pigments like carotenoids, chlorophyll, and anthocyanins, and this review explains how a family of proteins called WRKY transcription factors act as the control panel for making, breaking down, and converting those pigments. These proteins listen to cues like sunlight, temperature, and water stress, then team up with other regulator proteins to fine-tune exactly how much color a fruit develops as it ripens. Understanding this control system could eventually help breeders grow more colorful, nutritious fruit on purpose rather than by chance.
Key Findings
WRKY transcription factors regulate biosynthesis, degradation, and interconversion of four major pigment classes: carotenoids, chlorophylls, anthocyanins, and betalains
WRKYs act mainly through W-box DNA binding sites and form regulatory networks with MYB and bHLH transcription factors to fine-tune pigment genes
Pigment regulation is integrated with environmental cues (light, temperature, water, nutrients), hormone signaling, ROS, and MAPK cascades
chevron_right Technical Summary
Scientists reviewed how a family of plant proteins called WRKY transcription factors act as master switches controlling fruit color, from ripening tomatoes to apples, by turning pigment genes on and off in response to light, temperature, and other signals.
Abstract Preview
Original paper
Mechanistic insights into WRKY transcription factor-mediated regulation of fruit pigmentation.
WRKY transcription factors are key regulators of plant transcriptional networks and have emerged as important modulators of fruit pigmentation. This review summarizes recent advances in understandi...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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