Use of thermal imaging and the photochemical reflectance index (PRI) to detect wheat response to elevated CO and drought.

The spectral-based photochemical reflectance index (PRI) and leaf surface temperature (T ) derived from thermal imaging are two indicative metrics of plant functioning. The relationship of PRI with radiation-use efficiency (RUE) and T with leaf transpiration could be leveraged to monitor crop photosynthesis and water use from space. Yet, it is unclear how such relationships will change under future high carbon dioxide concentrations ([CO ]) and drought.

Early or late? The role of genotype phenology in determining wheat response to drought under future high atmospheric CO levels.

The combination of a future rise in atmospheric carbon dioxide concentration ([CO ]) and drought will significantly impact wheat production and quality. Genotype phenology is likely to play an essential role in such an effect. Yet, its response to elevated [CO ] and drought has not been studied before.