Effect of night temperature on the assimilation of carbon dioxide by mature pineapple plants, ananas comosus (L.) merr

Abstract

The influence of a range of ambient night temperatures (15-35°C) on theCO.exchange patterns of mature pineapple plants is described. As night temperatures are increased (with day temperatures held constant at 27 5°C) the net assimilation of CO. at night decreased, while that by day increased. An 8-hr night at 35°C induced a net night-time efflux of CO2 and a continuous uptake of CO2 throughout the 16-hr day. The proportion of the total net assimilation of CO. over a complete 24-hr cycle that was assimilated at night ranged from 100 to 0 %, depending upon night temperature and photoperiod. © 1973 ASEG.