Abstract
In northern part of Japan, rice crop production is occasionally damaged severely by cool temperature in summer due to the disturbance in pollen formation. Rice is most chilling sensitive at the onset of microspore release. Through the application of chilling stress in rice anther, the expression of OPDAR1 and Radc1 was repressed and the expression of SAMDC1 was induced. Expression patterns of these genes were histochemically examined in anthers from transgenic rice plants bearing individual gene promoter::GUS fusions. A new cis element that includes a DNA transposon sequence found in the 5' upstream region of Radc1, and functional importance of polyamine or jasmonate under chilling-stress during rice pollen formation will be discussed.
