Scientists discovered a gene variant in rice that helps plants tolerate heat without sacrificing yield, revealing how plants balance sun protection and stress response under rising temperatures and UV radiation.
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The UV light receptor OsUVR8b in rice is regulated by an energy-sensing enzyme (SnRK1), linking UV stress responses to the plant's broader metabolic energy state.
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A single amino acid change at position 177 (Serine) in OsUVR8b is associated with adaptation to tropical, high-temperature climates.
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The thermotolerant variant of OsUVR8b appears to modulate the tradeoff between heat stress survival and crop yield, suggesting it could be a target for breeding more resilient rice.
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