Long-term heat tolerance in plants
Two papers describe the genetic basis of long-term heat tolerance in the model plant Arabidopsis thaliana, with implications for crop breeding. Teruaki Taji and colleagues evaluated dozens of lines of the model mustard weed for both long term (37 °C for 36 days) and short term (42°C for 50 minutes) heat stress. The authors found considerable variation within the species, but little overlap between responses to the two different heat challenges, suggesting that long-term heat stress tolerance is controlled by different cellular mechanisms than the more commonly studied short-term heat stress. Chromosomal mapping using the F2 progeny of a cross between a long-term-heat ...

















