2025-11-17 CURRENT BIOLOGY 2025 35(卷), 22(期), (5502-5520页)
Heat waves, now more frequent and longer due to climate change, devastate plant productivity. Although they are rare, thermophilic plants could hold keys to engineering heat resilience in crop plants. Tidestromia oblongifolia is a thermophilic flowering plant that thrives at temperatures above 45 degrees C. When exposed to Death Valley summer conditions, T. oblongifolia increased its thermal optimum of photosynthesis and accelerated growth within 10 days. The physiological changes were accompanied by morphological, anatomical, and gene expression changes revealed by a newly sequenced genome. In bundle sheath cells where Rubisco fixes CO2, mitochondria relocated to chloroplasts and novel, cup-shaped chloroplasts appeared. Understanding how this plant acclimates under heat may afford new ways of engineering heat tolerance in crop plants.
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