Temperature Dependence of Photosynthesis in Agropyron smithii Rydb.

Temperature dependence of photosynthesis in cotton.

Cotton plants (Gossypium hirsutum L., var. Deltapine Smooth Leaf) were grown under controlled environmental conditions over a range of day/night temperatures from 20/15 to 40/35 C. Their photosynthetic characteristics were then measured over a comparable temperature range. Net photosynthesis tended stongly to be greatest, and intracellular resistance to CO(2) transport to be lowest, when the me...

Temperature acclimation of photosynthesis: mechanisms involved in the changes in temperature dependence of photosynthetic rate.

Growth temperature alters temperature dependence of the photosynthetic rate (temperature acclimation). In many species, the optimal temperature that maximizes the photosynthetic rate increases with increasing growth temperature. In this minireview, mechanisms involved in changes in the photosynthesis-temperature curve are discussed. Based on the biochemical model of photosynthesis, change in th...

Temperature dependence of photosynthesis in Arabidopsis plants with modifications in Rubisco activase and membrane fluidity.

Net photosynthesis (Pn) is reversibly inhibited at moderately high temperature. To investigate this further, we examined the effects of heat stress on Arabidopsis plants in which Rubisco activase or thylakoid membrane fluidity has been modified. During heating leaves from 25 to 40 degrees C at 250 ppm CO2 and 1% O2, the wild-type (WT), plants expressing the 43 kDa isoform only (rwt43), and plan...

Photosynthetic adaptation to temperature in c(3) and c(4) grasses: a possible ecological role in the shortgrass prairie.

Increasing pretreatment day temperatures of 20, 30, and 40 C resulted in decreased net photosynthesis in Agropyron smithii (C(3)) while in Bouteloua gracilis (C(4)) net photosynthesis was increased. The effect on photosynthesis of increasing analysis temperatures was the same as observed by increasing pretreatment temperatures. Resistance of the stomata and boundary layer were less affected by ...

The temperature dependence of the stimulation of photosynthesis by elevated carbon dioxide in wheat and barley