The response of plant to increasing CO_2 con-centration in the atmosphere was mainly stud- ied on the biomass and photosynthetic rate inearly studies.The short period or long periodresponse of different plants to the increasing ofCO_2 concentration in the atmosphere were dif- ferent,and sometimes contradictory.To studythe response mechanism of plants to increasingCO_2 concentration in the atmosphere,scien- tists have focused their research on Rubisco,akey enzyme in the photosynthetic carbonmetabolism. Studies of the effects of CO_2-riched atmo-sphere on the Rubisco content and activity,mRNA content in rice,and their relationshipshave not been reported.The aim of this studyis to analyze the effect of double CO_2 concen- tration in the atmosphere on the biomass,pho- tosynthetic rate,Rubisco content and activity,and translatable mRNA of Rubisco in rice. Results were as follows:
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