climate-change
Climate change refers to the ongoing shift in global temperatures and weather patterns driven largely by human activities such as fossil fuel combustion and deforestation. For plant science, these changes present critical challenges, as rising temperatures, altered precipitation, and increased atmospheric CO2 directly affect plant growth, development, and crop yields. Understanding how plants respond and adapt to these stressors is essential for developing resilient cultivars and securing global food systems.
open_in_new WikipediaPubMed · 2026-02-15
Warmer nights caused by climate change reduce rice grain quality by throwing off the balance between protein and starch. A study of two rice varieties found that one accumulated excess protein under high nighttime temperatures, making the rice stickier, chalkier, and less palatable.
Nighttime temperatures raised from 22°C to 27°C significantly increased grain protein content in one rice variety (YY4949) but not the other (HHZ), demonstrating clear genetic differences in heat stress response.
The protein-to-amylose ratio showed a stronger correlation with chalkiness and pasting (cooking texture) characteristics than protein content alone, identifying it as a key quality indicator under heat stress.
Accelerated chloroplast breakdown and upregulated nitrogen transport enzymes in YY4949 drove excessive nitrogen remobilization from leaves to grains, depleting the leaf 'source' and disrupting starch-protein balance in the grain.
