Systems analysis of long-term heat stress responses in the C4 grass Setaria viridis.

ABSTRACT: Many C4 plants are used as food and fodder crops and often display improved resource use efficiency compared to C3 plants. However, the response of C4 plants to future extreme conditions such as heatwaves is less understood. Here, Setaria viridis, an emerging C4 model grass, was grown under long-term high-temperature stress for 2 wk (42 °C, compared to 28 °C). This resulted in stunted growth, but surprisingly had little impact on leaf thickness, leaf area-based photosynthetic rates, and bundle sheath leakiness. Dark respiration rates increased, and there were major alterations in carbon and nitrogen metabolism in the heat-stressed plants. Abscisic acid and indole-3-acetic acid-amino acid conjugates accumulated in the heat-stressed plants, consistent with transcriptional changes. Leaf trans

SUBMITTER: Zhang P 

PROVIDER: S-EPMC11964294 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature