数字农科院2.0

Photosynthetic acclimation is a key contributor to exponential growth of a desert plant in Death Valley summer

文献类型： 外文期刊

作者： Karine Prado;Bo Xue;Jennifer E. Johnson;Sterling Field;Matt Stata;Charles L. Hawkins;Ru Ching Hsia;Hongbing Liu;Shifeng Cheng;Seung Y. Rhee

作者机构：

关键词： C4 NADP-ME;chloroplast morphology;desert plant ecology;high-temperature photosynthesis;mitochondria-chloroplast coupling;photosynthetic heat acclimation;Rubisco activase, RCA1;thermophile;thermotolerance;Tidestromia oblongifolia

期刊名称： Current Biology

ISSN： 0960-9822

年卷期： 2025 年 35 卷 22 期

页码：

收录情况： SCIE（2025版）

摘要： 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°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. Video abstract

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