Canopy warming accelerates development in soybean and maize, offsetting the delay in soybean reproductive development by elevated CO2concentrations
Year: 2018
Type: article
Abstract: Increases in atmospheric CO2concentrations ([CO2]) and surface temperature are known to individually have effects on crop development and yield, but their interactive effects have not been adequately investigated under field conditions. We evaluated the impacts of elevated [CO2] with and without canopy warming as a function of development in soybean and maize using infrared heating arrays nested within free air CO2enrichment plots over three growing seasons. Vegetative development accelerated in soybean with temperature plus elevated [CO2] resulting in higher node number. Reproductive development was delayed in soybean under elevated [CO2], but warming mitigated this delay. In maize, both vegetative and reproductive developments were accelerated by warming, whereas elevated [CO2] had no apparent effect on development. Treatment‐induced changes in the leaf carbohydrates, dark respiration rate, morphological parameters, and environmental conditions accompanied the changes in plant development. We used two thermal models to investigate their ability to predict the observed development under warming and elevated [CO2]. Whereas the growing degree day model underestimated the thermal threshold to reach each developmental stage, the alternative process‐based model used (βfunction) was able to predict crop development under climate change conditions.
Source: Plant Cell & Environment
DOI: 10.1111/pce.13410
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDGs: Zero hunger, Climate action
Open Access status: bronze
Award: G7673657196
OpenAlex ID: W2884092706