Abstract: Through changing sowing date, the impact of photoperiod-temperature conditions on the male-sterile gene expression of photoperiod-temperature sensitive genic male-sterile wheat line ES-8 was studied. The results show that in Changsha, when ES-8 was sowed from September 5 to October 15, the percentage of its pollen abortion and that of sterile plants were all 100%. When sowed from December 5 to December 15, its self seeding rate ranged in 71.6～72.7%, while from October 25 to November 25, it showed partly sterile and partly fertile. ES-8 had two critical dates of fertility alteration, one on October 25, from sterile to semi-sterile, and another on December 5, from partly fertile to completely fertile. The critical day-length of fertility alteration was less than 11.5 hours.

Key words: Wheat, Photoperiod-temperature sensitive genic male-sterility, Fertility alteration,Photoperiod-temperature condition, Wheat line ES-8, atmospheric dry deposition velocity, ecological effects, biogenic elements, fluxes of dry and wet depositions, Jiaozhou Bay