Growth and biomass productivity
Plant growth (as defined by change in plant height) was measured weekly following the emergence of seedlings. The experiment was terminated shortly following the opening of bolls, with the date varying across temperature treatments due to different growth rates. Harvests were performed immediately at the end of the experiment, on 116, 123, 126 and 145 DAP for 32/26oC, 32/22oC, 28/22oC and 28/18oC temperature regimes, respectively. The aboveground portion of the plant was collected by excising the stem just above the soil level, and separated into vegetative organs (leaves, stem and branches) and fruits (lint and bract). Plant materials were oven-dried at 70oC for at least 72 hours to constant mass before determining dry mass.